ML19259D091
| ML19259D091 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 08/15/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Boyer V PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 7908300168 | |
| Download: ML19259D091 (1) | |
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Io, UNITED STATES y } ) s,(f(,g NUCLEAR REGULATORY COMMISSION r, ik g/ : j REGION I 0, ' fin,,
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KING OF PRUSSIA, PENNSYLVANIA 19406 c
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Docket Nos. 50-352 AUG 151379 50-353 Philadelphia Electric Company ATTN:
Mr. V. S. Boyer Vice President Engineering and Research 2301 Market Street Philadelphia, Pennsylvania 19101 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, Rd4lithug cyce H. Grier Director
Enclosures:
1.
Supplement IE Bulletin 79-14 2.
Listing of IE Bulletins Issued in the Last 6 Months 2lb[
2b4 79083 00 K'8
ENCLOSURE 1 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 Supplement IE Bulletin No. 79-14 Date:
August 15, 1979 Page 1 of 2 SEISMIC ANALYSIS FCR AS-bOILT SAFETY-RELATED PIPING 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 ';, 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 selecte.d 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 performing these inspectons, 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 ar 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 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 meet the applicable technical specification action statement and complete the inspections required by Item 2 and 3 of the Bulletin as soon as possible.
The licensee must report the results of these h ments for content and sched DUPLICATE DOCUMENT 10 730 5 Entire document previously entered into system under:
ANO No. of Pages:
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