ML19249B949
| ML19249B949 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna  |
| Issue date: | 08/15/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Proffitt W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 7909070131 | |
| Download: ML19249B949 (2) | |
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ATL ANT A. GEORGI A 30303 5W In Reply Refer To:
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0-338, 50-50-404. 50-405 50-280, 50-281 Virginia Electric and Power Company Attn:
W. L. Proffitt Senior Vice President, Power P. O. Box 26666 Richmond, Virginia 51
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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, s
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- _ u h i ri Jaces P. O Reilly Director Enclosares:
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Supplement IE Bulletin No. 7 9-l J.
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List of IE Bulletins Issued in Last Six Months a,, ' : !)
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SSINS: 6820 Accession No:
7908080360 UNITED STATES NUCLEAR REGULATORY COT!ISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 August 15, 1979 Supplement IE Bulletin No. 79-14 SEISMIC ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPING SYSTEMS Description 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 system selected by the licensee in accordance with Item 2 of the Bulletin, the licensee is expected to verify by physica?
inspection, to the extent practicable, that the inspection elements meet the acceptance criteria.
In performing these inspections, the licensee is expected to use measuring techniques of sufficient accuracy to demonstrate that acceptance criteria are met.
Where inspection elements important to the seismic 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 nonconformance is found, the licensee is expected in accordance with Item 4 of the Bulletin to perform an evaluation of the significance of the nonconformance as rapidly as possible to determine whether or not the operability of the system might be jeopardized during a safe shutdown earthquake as defined in the Regulations.
This evaluation is expected to be done in two phases involving an initial engineering j udg ment (within 2 days), followed by an analytical engineering evaluation (athin 30 days). Where either phase of the evaluation shows that system operability is in jeopardy, the licensee is expected to meet the applicable t('
- lical specification action statement and complete the inspections The licensee requ red by Item 2 nd 3 of the Bulletin as soon as possible.
"'- " arcarance with the require-must report the results of thess,
ments for content and schedule fyDUPLICATE DOCUMENT f
4 3.
Inspect Remaining Piping fEntire document previously entered The licensee is expected to ins jintosystemunder:
il safety-related piping systems v i ANO
%C$OgC 3(g report the results in accordanc a schedule as given in Item 3 of
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