Decree No. 309 / 2005 Coll.
Ordinance on the provision of technical safety for selected equipment
Valid
Effective from 10.08.2005
Text versions:
10.08.2005
02.08.2005
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309
DECLARATION
of 22 July 2005
on ensuring the technical safety of selected equipment
According to Article 47 (7) for the implementation of § 2 (nn), § 4a (1), § 4b (1) and § 17 (1) (m) of Act No. 18 / 1997 Coll., on the Peaceful Use of Nuclear Energy and Ionising Radiation (Atomic Act) and on the Amendment and Addition of Certain Acts, as amended by Act No. 83 / 1998 Coll., Act No. 71 / 2000 Coll., Act No. 132 / 2000 Coll., Act No. 13 / 2002 Coll., Act No. 310 / 2002 Coll., Act No. 320 / 2002 Coll., Act No. 279 / 2003 Coll., Act No. 186 / 2004 Coll., Act No. 1 / 2005 Coll., and Act No. 253 / 2005 Coll. (hereinafter "Act '):
Subject matter
(1) This Decree was notified in accordance with Directive 98 / 34 / EC of the European Parliament and of the Council of 22 June 1998 laying down a procedure for the provision of information in the field of technical standards and regulations and rules and of rules on information society services, as amended by Directive 98 / 48 / EC.
(2) This Decree provides for
(a) the method of identification of selected installations specially designed for nuclear installations;
(b) technical requirements to ensure the technical safety of selected equipment in production and in operation;
(c) procedures for assessing the conformity of selected equipment specially designed for nuclear installations with technical requirements; and
(d) the method of ensuring the technical safety of selected equipment in operation.
Basic concepts
For the purposes of this decree:
(a) selected equipment specially designed for nuclear installations ("specially designed equipment"), selected safety class equipment (1), (2) and (3), the failure of which may cause the leakage of radioactive substances or ionising radiation and endanger human health;
(b) pressure equipment specially designed for the selected equipment, stressed by the pressure of the working medium, including elements connected to the components under pressure;
(c) the maximum pressure used for the design of the essential dimensions of the pressure equipment in which operation is permitted under normal operating conditions;
(d) the maximum permissible pressure indicated by the manufacturer for which the pressure equipment is designed;
(e) the calculation temperature of the highest temperature used for the design of the essential dimensions of the pressure equipment at which operation is permitted under normal operating conditions;
(f) a part of the selected device a part of the selected device whose failure or malfunction may compromise the technical safety of that device;
(g) an authorised person is a legal person authorised under § 4b (1) of the Act to act in assessing compliance with technical requirements;
(h) the production of a process towards the manufacture of the selected equipment after the entry into service or of the individual phases thereof. The production shall include in particular the design phase, the manufacture of its parts and the assembly or assembly of the selected equipment from the parts of the selected equipment,
(i) by putting the selected device into service the moment when the selected device is taken over and used by the authorisation holder (2) for the purpose for which it was manufactured;
(j) technical documentation of a set of documents provided for in this Regulation by which the manufacturer provides evidence of the method of manufacture of the specially designed equipment or parts thereof and of the manner and extent of verification of its technical condition in service throughout the lifetime;
(k) accompanying technical documentation a set of documents as provided for in this Regulation by which the manufacturer provides evidence of the condition of the specially designed equipment or parts thereof after their manufacture;
(l) a declaration of conformity of the document by which the manufacturer submits the declaration of conformity assessment of the equipment specially designed to be selected with the technical requirements in the manufacture of the equipment.
Method of identification of specially designed selected devices
(K § 4a (1) of the Act)
(1) Specially designed devices are selected
(a) pressure equipment constituting the limit of the pressure circuit of the nuclear reactor coolant, classified in Security Class 1, comprising pressure vessels and steam generators operating with radioactive substances whose maximum permissible pressure exceeds 0,05 MPa and whose volume is greater than 10 litres, or pumps, pipes and fittings operating with radioactive substances having a maximum permissible pressure exceeding 0,05 MPa with a clearance exceeding DN 70;
(b) pressure equipment classified in security classes 1, 2 and 3 which ensure reactor cooling, volume compensation and hermetic space cooling systems, normal and emergency replenishment systems, primary circuit cooling systems and systems for the storage of spent nuclear fuel operating at a maximum permissible pressure exceeding 0,05 MPa with a brightness above DN 70;
(c) pressure equipment of nuclear equipment working media cleaning systems classified in safety class 2 and 3 (pressure circuit cleaning system operating with a maximum permissible pressure exceeding 0,05 MPa with a brightness above DN 70);
(d) pressure equipment constituting the construction part of a hermetic envelope, designed for internal overpressure, classified in Security Class 2, including devices ensuring its hermeticity in the event of a maximum project accident;
(e) secondary circuit pressure equipment classified in security classes 2 and 3 where the working media calculation pressure at a calculation temperature exceeding 100 ° C exceeds 4 MPa and the piping is greater than DN 200; or
(f) packaging packages for the transport, storage and storage of spent nuclear fuel in safety class 2.
(2) In the list of selected nuclear equipment equipment, the specially designed selected equipment shall be identified separately.
Technical requirements to ensure technical safety applicable in the manufacture of specially designed selected equipment
[K § 2 (nn) and § 4a (1) of the Act]
(1) The production of the equipment specially designed for technical safety shall be carried out in such a way that the outputs of each production phase comply with the technical requirements. The technical requirements for specially designed selected equipment are set out in Annex 1.
(2) The technical requirements for the specially designed equipment to be used in the manufacture of this equipment, as set out in Annex 1, also apply to parts of that equipment.
(3) The method of production of the specially designed equipment or parts thereof and the method of verification of their technical condition in service shall be documented in the technical documentation. The technical documentation requirements are laid down in Part I of Annex No 2.
(4) During the production of the specially designed equipment or parts thereof, checks shall be carried out to verify its compliance with the technical requirements. The requirements for such checks are laid down in Annex 3.
(5) Upon completion of the production of the specially designed device or part thereof, their technical safety status shall be documented in the accompanying technical documentation in accordance with the requirements set out in Part II of Annex 2. The quality of the production shall be demonstrated by assessing the conformity of the equipment specifically designed or part thereof with the technical requirements and shall be demonstrated by a declaration of conformity issued by the manufacturer. The formalities for the declaration of conformity shall be laid down in Part III of Annex 2. The declaration of conformity shall be part of the accompanying technical documentation.
Assessment of conformity of specially designed devices with the technical requirements laid down for such devices
[K § 2 (nn) and § 4a and § 4b (1) of the Act]
(1) The conformity assessment shall be carried out in accordance with paragraph 2 and with the conformity assessment procedures set out in Annex 4. The conformity assessment of part of the specially designed selected installation shall be carried out before it is used in a nuclear installation.
(2) Individual conformity assessment procedures specifically designed for selected equipment are for:
(a) specially designed safety class 1 devices
1. the type-examination and quality assurance of the production of the equipment specifically designed (conformity assessment procedures B and D) in accordance with Parts 1 and 4 of Annex No 4,
2. type-examination and verification of the equipment specifically designed (conformity assessment procedures B and F) in accordance with Parts 1 and 5 of Annex No 4,
3. verification of the specially designed equipment as a whole (conformity assessment procedure G) according to Part 6 of Annex 4,
(b) specially designed security class 2 devices, with the exception of packaging packages for the transport, storage and storage of spent nuclear fuel and pressure equipment forming the construction part of a hermetic envelope designed for internal overpressure
1. the type-examination and quality assurance of the production of the equipment specifically designed (conformity assessment procedures B and D) in accordance with Parts 1 and 4 of Annex No 4,
2. type-examination and verification of the equipment specifically designed (conformity assessment procedures B and F) in accordance with Parts 1 and 5 of Annex No 4,
3. verification of the specially designed equipment as a whole (conformity assessment procedure G) according to Part 6 of Annex 4,
4. comprehensive quality assurance (conformity assessment procedure H) in accordance with Part 7 of Annex No 4,
(c) packaging files for the transport, storage and storage of spent nuclear fuel included in safety class 2 of the verification of the specially designed selected equipment (conformity assessment procedure F) in accordance with Part 5 of Annex 4;
(d) pressure equipment constituting the construction part of a hermetic envelope, dimensioned to internal pressure class 2 of the verification as a whole (conformity assessment procedure G) according to Part 7 or type-examination and verification (conformity assessment procedures B and F) according to Parts 1 and 5 of Annex 4;
(e) specially designed safety class 3 devices
1. the examination of the design and quality assurance of the production of the equipment specifically designed (conformity assessment procedures B1 and D) in accordance with Parts 2 and 4 of Annex 4;
2. design and verification of the equipment specifically designed (conformity assessment procedures B1 and F) in accordance with Parts 2 and 5 of Annex 4,
3. design examination and conformity with type (conformity assessment procedures B and C1) in accordance with Parts 1 and 3 of Annex No 4,
4. verification of the specially designed equipment as a whole (conformity assessment procedure G) according to Part 6 of Annex 4;
5. comprehensive quality assurance (conformity assessment procedure H) in accordance with Part 7 of Annex No 4.
(3) When assessing the conformity of specially designed devices referred to in paragraph 2 (e), another procedure referred to in paragraph 2 (a) or (b) shall apply, if any.
(4) The conformity assessment procedures set out in paragraph 2 shall apply mutatis mutandis to the conformity assessment of a part of the specially designed equipment selected.
(5) The conformity assessment procedure used shall be documented. Evidence of the conformity assessment procedure used shall include:
(a) the technical documentation of the specially designed equipment or parts thereof listed in Annex 2; and
(b) documents issued in conformity assessment by an authorised person to the extent specified in the individual conformity assessment procedures referred to in Annex 4.
Method of ensuring the technical safety and technical requirements of selected equipment during operation
[Paragraph 17 (1) (m) of the Law]
(1) The selected equipment shall be put into service only if the final test has verified that the technical safety of the selected equipment is ensured after production in accordance with the technical requirements.
(2) The technical requirements for the selected equipment to be used in operation are laid down in specific legislation3) The technical requirements for specially designed equipment to be used in operation are set out in Annex 1.
(3) The basic requirement for ensuring technical safety in the operation of the selected equipment is to carry out and evaluate checks to verify the conformity of the selected equipment with the technical requirements. Control programmes, control plans and procedures for their implementation and evaluation shall be developed for checks in accordance with operational rules. The requirements for these checks are laid down in Part III of Annex 3.
(4) The documentation documenting the technical safety of the selected equipment, including documentation of the preparation and implementation of the reconstruction, repair and maintenance, updated accompanying technical documentation, including records, shall be archived throughout the operation of the selected equipment in accordance with the specific legislation1).
(5) Technical safety shall be regularly evaluated on the basis of the results of the checks throughout the operation of the selected equipment.
Transitional provision
The authorisation holder who operates the selected installations at the time of the entry into force of this Decree shall ensure, no later than 2 years after the entry into force of this Decree, that the list of selected installations is designated in accordance with § 3 (2) and shall submit the list of selected installations to the Authority for approval.
Efficacy
This Decree shall take effect on 10 August 2005.
President:
Ing. Drábová v. r.
Příloha č. 1
Annex No. 1 to Decree No. 309 / 2005 Coll.
Technical requirements for specially designed devices
1. General requirements
1.1. The technical requirements set out in this Annex shall apply to the specially designed selected equipment provided for in Section 3 (1).
1.2. Technical requirements for specially designed selected equipment are:
1.2.1. the technical specification contained in a set of technical regulations, technical standards or technical conditions setting out the required characteristics of the specially designed selected equipment, such as the quality level, utility characteristics, safety, dimensions, conditions and requirements for the inspection of equipment and methods of inspection of equipment, the requirements for the marking of equipment, conformity assessment procedures, production methods and processes affecting the characteristics of the specially designed equipment; or
1.2.2. requirements applying after the specially designed selected equipment has been put into service, namely its own operating conditions, operating control conditions and their methods and conditions for re-use after repair or reconstruction of the specially designed equipment, if they can affect the technical safety of the equipment throughout its life.
1.3. Specially designed selected equipment is designed in accordance
1.3.1. with the requirements of special legislation4),
1.3.2. with the technical requirements laid down in this Decree,
1.3.3. With the requirements set out in its technical specification.
1.4. The specially designed selected device is designed to:
1.4.1. there could not be a sudden breach in all test and operating conditions, including unacceptable media leaks;
1.4.2. it has been possible to safely carry out all necessary planned and unplanned inspections, tests or revisions or diagnostics of the equipment during its operation;
1.4.3. it has been possible to safely perform the cleaning and washing of the deactivation solutions, repair and maintenance of the equipment.
1.5. The specially designed equipment shall be manufactured, tested and installed in such a way as to ensure its technical safety after its entry into service.
1.6. The specially designed selected equipment shall be capable of performing the required function in normal operation, abnormal operation, emergency conditions, project and maximum project accidents and of limiting the consequences of failures and accidents.
1.7. When processing the design of a specially designed device or modification of its technical characteristics, and possibly due to changes in the condition of the equipment caused by the operational degradation of the material, a technical safety hazard analysis shall be carried out and the final design shall be carried out taking into account the result of this analysis.
1.8. When selecting the most appropriate solution, the manufacturer shall apply the following principles in this order:
1.8.1. to the extent reasonably achievable, exclude or limit any foreseeable hazard;
1.8.2. apply appropriate protective measures against hazards which cannot be excluded.
1.9. Materials used for the manufacture of specially designed selected equipment and parts thereof ensuring the hermetics of the hermetic envelope shall be subject to similar requirements to those for pressure equipment referred to in point 4.
2. Design of pressure equipment
2.1. General
2.1.1. The pressure equipment shall be designed in accordance with its technical specification and taking into account the specified loads, in particular for normal operating conditions, abnormal operating conditions, emergency conditions and test pressure tests, so as to ensure the technical safety of the pressure equipment throughout its expected lifetime.
2.1.2. Appropriate safety factors shall be applied to the design of the pressure equipment using complex methods which are known to adequately calculate an adequate level of safety against all types of failures that are considered.
2.1.3. The design of the pressure equipment shall be based on the specified
2.1.3.1. the calculation, operation and test loads and their limits;
2.1.3.2. the operating conditions applicable to the pressure equipment;
2.1.3.3. the limit parameters of the operation of the pressure equipment in which mechanical movement is required;
2.1.3.4. operating modes with a view to its inclusion in the relevant safety class under a special legislative provision (1),
2.1.3.5. chemical and physical parameters of the media used in pressure equipment,
2.1.3.6. the corrosive effects of the media on the material of the pressure equipment over the required lifetime of the design of the device;
2.1.3.7. Requirements for demonstrating resistance to seismic effects or cyclic loads.
2.1.4. The pressure equipment shall be designed and manufactured in such a way as to eliminate or minimise the risk of significant loss of resistance to pressure due to a failure leading to a breach of the integrity of the pressure equipment and the spread of radioactive substances. In such cases, appropriate means of protection shall be provided to maintain operational parameters, by downstream power supply systems and heat drainage systems ensuring that the level of the medium in the pressure equipment is maintained and that the residual heat is safely removed during or after operation.
2.1.5. The pressure equipment forming the construction part of the hermetic envelope, including those affecting the tightness of the hermetic envelope, shall be designed, constructed and installed in such a way that the tightness can be determined in the design calculation pressure after installation of all passages.
2.1.6. The pressure pipe is designed and manufactured in such a way that the risk of overload due to unacceptable wills or excessive forces arising from flanges, joints, bellows, etc., is regulated, for example, by means of support, reinforcement, anchoring, levelling and prestressing.
2.2. Design to ensure proper strength
2.2.1. The pressure equipment shall be designed for a load corresponding to its intended use and reasonably foreseeable operating conditions. It is necessary to take into account the various loads which may be combined, taking into account the likelihood of their present occurrence.
2.2.2. The design ensuring the proper strength shall be based on the calculation method referred to in paragraph 2.2.3, supplemented if necessary by the experimental method. Only verified calculation programmes shall be used for the calculation.
2.2.3. Calculation method
2.2.3.1. The calculation methods provide a sufficient level of safety in accordance with requirements laid down by technical regulations or technical standards
2.2.3.1.1. to perform strength calculations;
2.2.3.1.2. On the mechanical properties of the base materials used,
2.2.3.1.3 on unbreakable (weld) connections and
2.2.3.1.4 to carry out pressure equipment checks and tests.
2.2.3.2. Resistance to internal pressure and other load aspects
Tolerance for pressure equipment shall be limited to the types of failure the occurrence of which can be predicted under operating conditions and operating modes. It is therefore necessary to apply safety factors that allow for the complete elimination of any uncertainty arising from production, actual operating conditions, stress, calculation models, as well as the characteristics and behaviour of the material.
2.2.3.3. Strength
2.2.3.3.1. Appropriate strength calculations shall be used to ensure the strength of the pressure equipment, including appropriate calculation, operation and test loads.
2.2.3.3.2. When calculating the strength of the pressure equipment, account shall be taken in particular of these loads:
2.2.3.3.2.1. internal and external pressure,
2.2.3.3.2.2. the effect of the device's own load and load,
2.2.3.3.2.3. additional load (effect of load on connected devices, insulation, pipes, etc.),
2.2.3.3.3.2.4. Strength from supports and pipes,
2.2.3.3.3.2.5. Temperature effects including temperature shocks;
2.2.3.3.2.6. vibration load,
2.2.3.3.2.7. seismic effects, wind load, flood,
2.2.3.3.2.8. processes causing material degradation due to radioactivity;
2.2.3.3.2.9. hydraulic resistors and pressure shocks,
2.2.3.3.2.10. aircraft crash
and other relevant loads resulting from hazard analysis in accordance with point 1.7.
2.2.3.3.3. Calculation loads
2.2.3.3.3.1. The calculation pressure shall be equal to or greater than the maximum allowable pressure and shall take into account the pressure shocks, system errors and system configuration influences. A test pressure equal to or greater than 1,25 times the calculation pressure shall be used for the design of the essential dimensions of the device. For parts of the structure, loaded at the same time by internal and external pressure, the difference between the two pressures at which the greatest wall thickness is achieved is taken at the calculation pressure.
2.2.3.3.3.2. The calculation temperature is determined with an appropriate level of safety. The calculation temperature shall not be less than the expected maximum mean temperature after the thickness of the part under consideration to which the limits for normal and abnormal operating conditions apply. If the equipment or pipes are heated by heat transfer from sources such as induction spirals, sheathing or internal heat source, their influence shall be taken into account when determining the calculation temperature.
2.2.3.3.3.3. The calculation loads shall be selected in such a way that, in combination with the effects of the calculation pressure, the greatest wall thickness of the equipment subject to normal operating conditions is determined.
2.2.3.3.3.4. The maximum stress and concentration values shall be kept within safe limits.
2.2.3.3.4. Operating load
When calculating the strength of the pressure equipment, account shall be taken, as appropriate, of all loads occurring under normal operating conditions, as well as those loads which are given by the technological operation to which the pressure equipment is intended and the external loads which are normally present. They also include stress and deformation loads in equipment material during production, transport, assembly and pressure tests, including residual stresses, the effect of which on the breaking strength states shall be assessed individually according to their significance.
2.2.3.3.5. Test load
2.2.3.3.5.1. In the strength calculation of pressure equipment, the expected test load shall be taken into account to verify the integrity of the device after its production, installation, given the period of operation, repair or reconstruction.
2.2.3.3.5.2. In particular, the test load shall be the pressure tests designed to check, at a pressure determined by the level of safety in relation to the calculation or, if applicable, the maximum permissible pressure, whether the device shows significant deformations or leakage exceeding the specified limit.
2.2.3.3.5.3. The test pressure shall be determined taking into account the evaluation of geometric and material characteristics and test conditions at the production site or in service in accordance with the requirements laid down in the technical regulations, technical standards or technical conditions for the production of pressure equipment.
2.2.3.3.6. Calculation of strength for pressure equipment shall be made for the following limits
2.2.3.3.6.1. sudden breach (tenacious or fragile),
2.2.3.3.6.2. Plastic deformations in the whole section of the component,
2.2.3.3.6.3. One-way growth of the plastic component by proportional deformation at cyclic load resulting in an unacceptable change of dimensions or breach;
2.2.3.3.6.4. the formation of cracks at cycle load,
2.2.3.3.6.5. loss of stability.
2.2.3.3.7. In the calculation of the strength for the limit states referred to in paragraph 2.2.3.3.6, values corresponding to material, strength, plastic, brittle-column characteristics and deformation resistance, as specified in the technical regulations or technical standards for the material in question, or experimentally determined by the accredited test laboratory, shall be used.
2.2.3.3.8. In the case of welded joints, it is necessary to choose for material properties appropriate values of the coefficient of joints depending on the type of materials connected, the type of non-destructive checks used and the assumed operating conditions.
2.2.3.3.9. For pressure equipment design, foreseeable degradation mechanisms (e.g. influence of radioactivity, corrosion, material fatigue) corresponding to the intended use of the equipment and related life of the equipment shall be taken into account in an appropriate manner.
2.2.3.3.10. The calculation of the strength of the pressure equipment shall be made in two stages
2.2.3.3.10.1. calculation for the design of basic dimensions of equipment (hereinafter referred to as "design of basic dimensions"),
2.2.3.3.10.2. equipment control calculation ("control calculation").
2.2.3.3.11. When designing basic dimensions, the permissible stress shall be calculated from the tensile strength and from the contractual slip limit, which are the essential characteristics of the materials permitted for the production of the equipment. The relevant safety factors shall be considered when calculating the permitted stresses.
2.2.3.3.12. When designing basic dimensions it is necessary to consider limit states
2.2.3.3.12.1. persistent infringement,
2.2.3.3.12.2. plastic deformations in the whole section of the component,
2.2.3.3.12.3. stability loss.
2.2.3.3.13. Following the design of the basic dimensions of the installation, a control calculation shall be drawn up which shall aim to:
2.2.3.3.13.1. strength demonstration at static (monotone) load,
2.2.3.3.13.2. demonstration of strength at cyclic (variable) loads,
2.2.3.3.13.3. demonstration of resistance to sudden (unstable) infringements,
2.2.3.3.13.4. vibration strength demonstration,
2.2.3.3.13.5. demonstration of resistance to loss of stability; and
2.2.3.3.13.6. demonstration of resistance to seismic effects.
The control calculation of pressure equipment shall take into account all loads, including temperature effects and all operating modes specified in the technical specifications and operating conditions. In particular, consideration shall be given to degradation of material properties during operation, surface quality, influence of voltage gradient, influence of corrosion environment, etc.
2.2.4. Experimental design method
2.2.4.1. The correct design of the pressure equipment as a whole or parts thereof shall be verified by an appropriate programme of checks and tests carried out on a representative sample of the equipment.
2.2.4.2. A programme of checks and tests shall be established before the start of the tests. The programme of checks and tests shall be recognised by the authorised person responsible for the design conformity assessment procedure, if any.
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Regulation Information
| Citation | Decree No. 309 / 2005 Coll., on the provision of technical safety of selected equipment |
|---|---|
| Regulation Type | - |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 02.08.2005 |
|---|---|
| Effective from | 10.08.2005 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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