ML19276H413
| ML19276H413 | |
| 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. |
| Shared Package | |
| ML19276H411 | List: |
| References | |
| NUDOCS 7910220236 | |
| Download: ML19276H413 (3) | |
Text
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'o, UNITED STATES
?!.dyx. g( ~npy.1 NUCLE AR REGULATORY COMMISSION N
REGION V o (rW{g g
1990 N. CALIFORNIA EOULEVARD
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SUITE 202, WALNUT CREEK PLAZA 4
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WALNUT CREEK, CALIFORNIA 94596 August 15, 1979
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Occket ilo. 50-344 Portland General Electric Company 121 S. W. Salmon Street Portland, Oregon 97204 g
MUh @UuutJOUVALL, Attention: Mr. Charles Goodwin J
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, please contact this office.
Sincerely,
- [ t I qsc.,b -.--
R. H. Engelken Director
Enclosure:
Supplement IE Bulletin No. 79-14 cc w/ enclosure:
B. Withers, PGE F. Gaidos, PGE 236 7910220
SSIUS:
E020 Accession !:n:
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UNITED STATES h@
NUCLEAR REGULATCRY CON?ilSSI.0tj Gk9 0FFICE OF IG3PECTICN AND ENFORCEMENT T
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9 hb WASHINGTON, D.C.
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August 15, 1979 Sucplement IE Bulletin No. 79-14 SEISMIC ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPING SYSTEMS Discription of Circumstances:
IE Bulletin tJo. 79-14 was issued on July 2,1979 and revised on July 18, 1979.
The bulletin reauested ' licensees to take certain actions to verify that seismic analyses are applicable to as-built plants.
This supolement to the bulletin provides additional guidance and definition of Action Itens 2, 3, and 4.
To comply with the requests in IE Sulletin'79-14, it will be necessary for licensees to do the following.
2.
Inspect Part of the Accessible Piping For each system selected by the licensee in accordance with Item 2 of the Bulletin, the licensee is excected 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 met.
Where inspection
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elements important to the seismic analysis cannot be viewed because of themal insulation or location of the piping, the licensee is expected to remove themal 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 confomance 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 rapialy as possible to determine
'~shether or not th operability of the system night be jeopardi:ed during a safe shutdown earthquake as defined in the Regulations.
This evalua'. ion 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 system operability is in jeopardy, the licensee is expected to reet the applicable technical specification action statement and ccmolete the inspections The licensee required by Item 2 and 2 of the Eulletin as scon as possible.
must recort the results of these inspections in accordance with the recuire-cents for content and schedule as given in Item 2.and 3 of the Bulletin.
3.
Inspect Renaining Piping The licer.see is excected to Hsrect, as in I:cm 2 d ove, the rs a"ing safety-related piping sjstems 1.hich were seis-icall,. analy ec and to recort the results in accordance with the requirements for content and schedule as given in Item 3 of the Bulletin.
1149 100
Page 2 of 2 Succler.ent IE Eulletin l'o. 79-14 4
August 15, 1979 yb W p
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j 4A.
Evaluate l'oncomforrances With regard to Item 2A for the Sulletin, the licensee is expected to include in.the initial engineering judgement his justification for continued reactor c::eration.
For the analytical engineering evaluation, the licensee is expected to perform the evaluation by using the sane analytical technique used in the seismic-analysis or by an alternate, less cerclex techaicue :'revided that the liye" can show that it is conservative.
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If either part of the evaluation shows that t'.e system nay not perform c
its intended function during a design basis earthquake, the licensee must promptly ccmoly with applicable action statements and reporting requirements in the Technical Specifications.
4B.
Submit fianconferrance Evaluations The lice ~nsee is excected 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 Item 4B of the Bulletin or correct the nonccafomances.
4C.
Correct !!onconformances If the licensee elects to correct nonconformances, the licensee is
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expected to submit schedules and work descriptions in accordance with Item 4C of the Bulletin.
4D.
Improve Oualtiy Assurance If noncomfomances are identified, the licensee is expected to evaluate and improve quality assurance procedures to assure that future modifica-tions are handled efficiently.
In accordance with Item 40 of tha Bulletin, the licensee is expected to revise design documents and seismic analyses in a timely ranner.
The schedule for the action and reporting requirementt given in the Bulletin as originally issued renains unchanged.
3180225 (R0072), clearance expires 7-31-80.
Approval was Approved by GAO, given.:nder a blankat clearance specifically for ider.tified ger.eric problems.
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