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Rules for Mechanical Design and Pressure Testing for Detector vessel

Compliance guide for European and Swedish regulations on pressure equipment design, manufacturing, inspection, and testing for detectors.

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Rules for Mechanical Design and Pressure Testing for Detector vessel

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  1. Rules for Mechanical Designand Pressure Testing for Detector vessel Nathalie de Ruette Detector Lab Coordination officer European Spallation Source ERIC 2019-01-18

  2. Need to Fulfil European and Swedish Laws, and ESS Rules AFS 2016:1 Pressureretainingequipment ESS Rules for Quality Regulation - Mechanical Equipment PED 2014/68/EU EN 13458 AFS 2017:3 Use and inspection of pressurize equipment SSM Special conditions for ESS in Lund ESS requirements EN 13445 Code RCC-MRx AFS 2006:8 Overpressure testing EN 13480

  3. CoC – Certificate of Compliance/Conformity What are the requirements? Documentation before starting manufacturing/Installation Documentation after Manufacturing/Installation

  4. 1. Determine Quality Classes Safety classes regarding emission of radioactive substances: MQC1 – 4 • Based on the risk assessment (see ESS-0033258 and ESS-0016468) • MQC4: the design and manufacture of pressure equipment where deficiencies or malfunctions will not cause emission of radioactive substances • Assume no emission from detector vessels • Argon activation very small: E. Dian, K. Kanaki, R.J. Hall-Wilton, P. Zagyvai, Sz. Czifrus, "Neutron activation and prompt gamma intensity in Ar/CO2-filled neutron detectors at the EuropeanSpallation Source", AppliedRadiation and Isotopes 128C (2017) pp. 275-286, DOI:10.1016/j.apradiso.2017.06.003, arXiv:1701.08117

  5. 1. Determine Quality Classes For MQC4, the regulations AFS 2016:1 (PED, 2014/68/EU), AFS 2016:2 and AFS 2017:3 issued by the Swedish Work Environment Authority apply. • AFS 2017:3 defines inspection class A-B-C Pressure Vessel

  6. Find PED Category of a Vessel PED Category Calculator Inert Reactive We are investigating the implications of operating at 0.5 bar

  7. Find PED Category of a Vessel

  8. 2. Documentations Minimum documentation after manufacturing Most documents already exist

  9. 3. Inspection and Testingrequirements ESS Inspection Points, “EIP”: Describe the scope of the inspection ESS Examination Procedures “EEP”: gives references and instructions (scope, performance, acceptance criteria and reporting) for each EIP ESS-0108754 RESSQ-Mech Part C - Table of Contents of ESS Examination Procedures (EEP)

  10. Example of EIP

  11. Example of EEP AFS 2006:8 TESTING WITH OVERPRESSURE OR UNDERPRESSURE • Pressure testing with gas only. • The requirement on accreditation does not apply if: • The control pressure is 0.03 bar or lower • The control pressure is not more than 3 bar and P x V is not greater than 30 bar x litre

  12. 4. Detector Vessel Pressure Testing We need to follow the regulations (AFS 2006:8) P x V > 30 bar x litre! Can we do the testing inhouse? Yes, if: • we use liquids (water), or • we reduce the volume of the vessel, or • we get accreditation for the people (≈ 10 already accredited) • and facility (long and complicated). Otherwise, we need to outsource the testing to an accredited body.

  13. Conclusion It’s complicated!!! • We need help! • Try to avoid complications whenever possible by staying in MQC4-C and outside the PED • Quality could not provide the support needed

  14. What do we need to do to: • Purchase mechanical equipment • Manufacture mechanical equipment in-house and outsourced • Purchase installations and repairs • Install or repair under own management

  15. Mechanical Equipment: Generic term for equipment or components that serve to: • Receive external or internal pressure • Bear mechanical loads • Protect such pressure- and load bearing equipment referred to in the first and second indents (above) • Hold or control components in the intended manner • Include supports, holders, hangers and locking devices (not for lifting or moving components).

  16. ESS Examination Procedures EEP 2-7XX = Examination of base material and finished part EEP 3-7XX = Examination of manufacturing, welding and other joining EEP 4-7XX = Examination of completed mechanical equipment or subassemblies EEP 5-7XX = Examination of installation, welding and other joining EEP 6-7XX = Examination of completed installation of a system, parts of a system or repair of installed equipment

  17. CHESS

  18. CHESS

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