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GPG14 Revision

GPG14 Revision. Pete Burgess. History. IRR 1985 – instruments shall be appropriately tested How – nothing said First attempt – a document for BNFL Sellafield addressing their portable kit and circumstances. Next Stage. HSE commissioned guidance – HS(G)49

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GPG14 Revision

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  1. GPG14 Revision Pete Burgess

  2. History • IRR 1985 – instruments shall be appropriately tested • How – nothing said • First attempt – a document for BNFL Sellafield addressing their portable kit and circumstances

  3. Next Stage • HSE commissioned guidance – HS(G)49 • Based on a very expanded version of the Sellafield document.

  4. GPG14 • HSE withdrew prescriptive guidance. • Asked the IRMF to take on provision • GPG14 – a fairly broad revision of HS(G)49 • Very successful, used round the world • Lead on to GPG29, 30 etc

  5. Now time for revision • Comments received – - advice on interpolation for photon contam monitor responses - development of the contiguous portions method. - updating for the IRR 1999 regs - QP was a legal appointment, now it isn’t

  6. More revision • Smart probes and interchangeability • Light leakage for dose rate scints • The problem of tying type test data to observed responses • Dose rate instruments with energy responses which can show variation in the 100 – 250 keV range

  7. Even more • More encouragement in the use of point sources for linearity testing • Auto-ranging instruments – do we need to test each decade? Are there relays which we don’t know about? • Energy response confirmation for high dose rate detectors • More guidance on testing after repair such as refoiling

  8. And more • Bring references up to date, especially IEC • Much more guidance on dealing with non-uniform contam sources • Dealing with dose rate monitors with really low responses at 900 but which are generally OK at slightly smaller angles – enrgy comp end window GMs

  9. More • QP training and competence – the statement in IRR99 • “Qps have to be fully conversant with, and have knowledge and understanding of, currently accepted testing standards and relevant technical guidance.” • How do we ensure this?

  10. Summary • Lots to do • NPL will: • Review all the suggestions • Incorporate those which are well supported and clearly a good idea • Circulate those where there is a need for discussion • Produce a draft for comment

  11. When? • Draft before the next meeting.

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