ML19207B551

Forwards IE Bulletin 79-14,Suppl 1, Seismic Analysis for As-Built Safety-Related Piping Sys. Action Required

ML19207B551
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	08/15/1979
From:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
To:	Goodwin C PORTLAND GENERAL ELECTRIC CO.
References
TAC-12369, NUDOCS 7908300241
Download: ML19207B551 (1)

Text

'o UNITED STATES k

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' ' *i, NUCLEAR REGULATORY COMMISSION REGION V 1990 N, CALIFORNI A BOULEVARD e'g o,

SUITE 202, WALNUT CHEEK PLAZA

+,,,e WALNUT CREEK, CALIFORNI A 94596 August 15, 1979 Docket tio. 50-344 Portland General Electric Company 121 S. W. Salmon Street Portland, Oregon 97204 Attention: Mr. Charles Gcodwin Assistant Vice President Gentlemen:

The enclosed supplement to Bulletin 79-14 is forwarded to you to provide added guidance on the intent of the Bulletin.

If you desire additional information regarding this matter, pleasc contact this office.

Sincerely, OLY cC0~

q R. H. Engelken Director

Enclosure:

Supplement IE Bulletin flo. 79-14 cc w/ enclosure:

B. Withers, PGE F. Gaidos, PGE 852 340 7 9083 0039 g

SSIrlS:

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UtlITED STATES NUCLEAR REGULATORY COMtilSSION OFFICE OF INSPECTION AND ENFORCEliEflT WASHINGT0il, D.C.

20555 August 15, 1979 Suoplement IE Bulletin No. 79-14 SEISMIC ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPIMG SYSTEMS Discription of Circumstances:

IE Bulletin No. 79-14 was issued on July 2,1979 and revised on July 18, 1979.

The bulletin requested licensees to take certain actions to verify that seismic analyses are applicable to as-built plants.

This supplement to the bulletin provides additional guidance and definition of Action Items 2, 3, and 4.

To comply with the requests in IE Bulletin '79-14, it will be necessary for licensees to do the following:

2.

Inspect Part of the Accessible piping For each systen selected by the licensee in accordance with Item 2 of the Bulletin, the licensee is expected to verify by physical inspection, to the extent practicable, that the inspection elements meet the acceptance criteria.

In perfoming these inspectons, the licensee is expected to use measuring techniques of sufficient accuracy to demonstrate that acceptance criteria are net. Where inspection elements important to the seisnic analysis cannot be viewed because of thermal insulation or location of the piping, the licensee is expected to remove thermal insulation or provide access.

Where physical inspection is not practicable, e.g., for valve weights and materials of construction, the license is expected to verify conformance by inspection of quality assurance records.

If a nonconfomance is found, the licensee is expected in accordance with Item 4 of the Bulletin to perfom an evaluation of the significance of the nonconfomance as rapidly as possible to detemine whether or not the operability of the system night be jeopa;dized during a safe shutdown earthquake as defined in the Regulations.

This evaluation is expected to be done in two phases involving an initial engineering judgement (within 2 days), followed by an analytical engineering evaluation (within 30 days). Where either phase of the evaluation shows that systein operability is in jeopardy, the licensee is expected to meet the applicable technical specification action statement and complete the inspections required by Iten 2 and 3 of the Bulletin as soon as possible.

Tle licensee must report the results of these inspections in accordance with the require-

.ments for content and schedule as given in Item 2 and 3 of the Bulletin.

3.

Inspect Remaining Piping The licensee is expected to inspect, as in Item 2 above, the remaining safety-related piping systems which were seismically analyzed and to report the results in accordance with the requirements for content and br^d q4}

schedule as given in Item 3 of the Bulletin.

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9 Supolement IE Bulletin No. 79-14 Page 2 of 2 August 15, 1979 4A.

Evaluate Monccmformances With regard to Item 3A for the Bulletin, the licensee is expected to include in the initial engineering judgement his justification for continued reactor operation.

For the analytical engineering evaluation, the licensee is expected to perform the evaluation by using the same analytical technique used in the seismic-analysis or by an alternate, lett cerclex tecSnicue p-Ovided that the lice see can show that it is conservative.

If either part of the evaluation shows that the system may not perform its intended function during a design basis earthquake, the licensee must promptly comply with applicable action statements and reporting requirements in the Technical Specifications.

4B.

Submit Nonconformance Evaluations The licensee is expected to submit evaluations of all nonconformances and, where the licensee concludes that the seismic analysis may not be conservative, submit schedules for reanalysis in accordance with Iten 4B of the Bulletin or correct the noncomformances.

4C.

Correct Nonconformances If the licensee elects to correct nonconformances, the licensee is expected to submit schedules and work descriptions in accordance with Iten 4C of the Bulletin.

40.

Improve Oualtiy Assurance If noncomformances are identified, tha licensee is expected to evaluate and improve quality assurance procedures to assure that future modifica-tions are handled efficiently.

In accordance with Iten 4D of the Bulletin, the licensee is expected to revise design documents and seismic analyses in a timely manner.

The schedule for the action and reporting requirements given in the Bulletin as originaliy issued remains unchanged.

Approved by GAO, B180225 (P.0072); clearance expires 7-31-80.

Approval was given under a blanket clearance specifically for identified generic problems.

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