Rules for Mechanical Design and Pressure Testing for

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

Need to Fulfil European and Swedish Laws, and ESS Rules ESS R 1 16: nt ules PED 20 FS 20 equipme - M for Qua d 14 A/68 ret/ai. Ening l e i n t c y h u R a L e n U e g r i c u u s n a l s i ation l e r E P q S u S i p E m A e U r F s n e and fo EN 13458 S t 2 i n 0 s spec 1 n s 7 t t n i o e : o n 3 m i e o r i t f u i p q e r r e S d s S s E urize n 5 o equi c 4 pme l a 4 nt i c 3 e 1 p S N C o M E de R S S CACF-M S 2 0 0 6 : 8 R EN 13480 x Overpressure tes ting 2

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

1. Determine Quality Classes Safety classes regarding emission of radioactive substances: MQC 1 – 4 • Based on the risk assessment (see ESS-0033258 and ESS-0016468) • MQC 4: 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/CO 2 -filled neutron detectors at the European Spallation Source", Applied Radiation and Isotopes 128 C (2017) pp. 275 -286, DOI: 10. 1016/j. apradiso. 2017. 06. 003, ar. Xiv: 1701. 08117 4

1. Determine Quality Classes For MQC 4, 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 5

Find PED Category of a Vessel PED Category Calculator Inert Reactive We are investigating the implications of operating at 0. 5 bar 6

Find PED Category of a Vessel 7

2. Documentations Minimum documentation after manufacturing Mos t do cum ents alre ady exis t 8

3. Inspection and Testing requirements 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) 9

Example of EIP 10

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 11

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. 12

Conclusion It’s complicated!!! • We need help! • Try to avoid complications whenever possible by staying in MQC 4 -C and outside the PED • Quality could not provide the support needed 13

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 14

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). 15

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

CHESS 17

CHESS 18