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USQ

USQ. Dick Englehart Office of Nuclear and Facility Safety Policy. USQ Guide Changes. External audit findings Design basis reconstitution Control of hazards during installation of modifications EFCOG issues Operability determinations. External audit findings.

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USQ

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  1. USQ Dick Englehart Office of Nuclear and Facility Safety Policy

  2. USQ Guide Changes • External audit findings • Design basis reconstitution • Control of hazards during installation of modifications • EFCOG issues • Operability determinations

  3. External audit findings • Dealing with multiple findings that could (or could not) constitute PISAs in hours to days • Consult DOE w/o delay; agree on approach with expeditious schedule; prioritize; disposition each finding • Imminent hazard – address as PISA without delay

  4. Design basis reconstitution(similar to external audit situation) • DBR efforts qualify as DSA upgrades • USQ doesn’t apply for new requirements or different analysis methods (prob/conseq) • USQ applies when safety basis is not bounding or otherwise inadequate • Project should have a process for prompt sorting of questions and issues as: • Normal part of reconstitution • PISAs

  5. Control of hazards during installation of modifications • Worker hazards dealt with under normal work control procedures • USQ invoked if and when facility safety basis may be affected

  6. EFCOG Issues • Screening • Simple go/no go decision • Is vs As (described in the DSA) • Evaluation of the safety of the situation (PISA) and JCO • Discernable increase • Major modifications • Transportation

  7. Operability Determinations • Non conforming SSC (loss of quality or functional capability) • PISA – place the facility in a safe condition – shutdown? • Forward-looking determination • Immediate: best available info and operational restrictions, if imposed • Final documented: analysis, tests, operating experience, engr. Judgment, availability of other equipment, conservatisms and margins, etc. • Final determination – part of the evaluation of the safety of the situation

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