ML20135C216
| ML20135C216 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 11/27/1996 |
| From: | Graham P NEBRASKA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-80-13, NLS960198, NUDOCS 9612060227 | |
| Download: ML20135C216 (3) | |
Text
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ewm uueaAn n-P.O. BOX 90, BROWNVt1E. NEBRASKA 68321 Nebraska Public Power District "Taggy" NLS960198 November 27,1996 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001
Subject:
Inspection of Core Spray Spargers and Piping Cooper Nuclear Station, NRC Docket 50-298, DPR-46
References:
1.
IE Bulletin 80-13, Visual Inspection of Core Spray Spargers 2.
EPRI Report TR-106740 dated July 1996, "BWR Vessel and Internal Project, Core Spray Internals Inspection and Flaw Evaluation Guidelines (BWRVIP-18)"
3.
Letter to C. E. Carpenter (USNRC) from J. T. Beckham, Jr. (BWRVIP Chairman) dated July 26,1996 4.
Letter to NRC Document Control Desk from J.11. Mueller (NPPD) dated November 22,1995, "IE Bulletin 80-13 Response; Visual Inspection of Core Spray Spargers" 5.
Letter to G. R. Horn (NPPD) from J. R. IIall (USNRC) dated December 21,1995," Cooper Nuclear Station - Evaluation of Core Spray Piping Indications (TAC No. M94097)"
Gentlemen:
Cooper Nuclear Station has been performing augmented examinations of the Core Spray System piping and spargers inside the reactor vessel since 1980, in accordance with the requirements of NRC Bulletin 80-13 (Reference 1). The purpose of this letter is to inform you that the Nebraska Public Power District (the District) is revising our previous commitment (References 4 & 5) and will follow the guidance in BWRVIP-18 (Reference 2) for future examinations of the Core Spray spargers and associated piping.
IE Bulletin 80-13 requires visual examinations of 100% of the accessible Core Spray spargers and associated piping using 0.001" resolution. The Boiling Water Reactor Vessel and Internals Project (BWRVIP) developed a comprehensive guideline for the inspection and evaluation of the spargers and associated piping based on industry experience gained since 1980. This guidance document, BWRVIP-18, was submitted to the NRC for review under separate cover (Reference 3). BWRVIP-18 requires visual examinations to be performed at 0.0005" resolution, AhQ;yr%lbl'I q)h annnn 9612060227 961127 s
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- NLS960198
', November 27,1996 l
Page 2 0f 2 i
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allows the use of ultrasonic examination techniques for pipe welds, focuses attention on the areas l
which have shown susceptibility to cracking (i.e. creviced welds), and relaxes the examination i
frequency for areas not found to be susceptible to cracking (i.e. piping base metal). The results l
of the inspections will be included in the Inservice Inspection Summary Report which is l
submitted after the completion of the outage. Indications that exceed the allowable flaw sizes will be repaired or evaluated for continued operation. All evaluations will be submitted to the NRC for approval prior to restart.
The District will implement the BWRVIP-18 inspection guidelines during the 1997 refueling outage (RFO-17). If you have any questions on the District's augmented inspection program for future examinations of the Core Spray spargers and associated piping, please do not hesitate to call.
Sincerely, b
~'
P. D. Graham Vice President - Nuclear
/dnm cc:
Regional Administrator USNRC - Region IV Senior Project Manager USNRC - NRR Project Directorate IV-1 j
Senior Resident Inspector
]
USNRC NPG Distribution i
LIST OF NRC COMMITMENTS l
, ATTACHMENT 3 Correspondence No: NL9960198 The following table identifies those actions committed to by the District in this document.
Any other actions discussed in the submittal represent intended or planned actions by the District. They are described to the NRC for the NRC's information and are not regulatory commitments.
Please notify the Licensing Manager at Cooper Nuclear Station of any questions regarding this document or any associated regulatory commitments.
COMMITTED DATE COMMITMENT OR OUTAGE Inspect Core Spray Spargers and associated piping in accordance with BWRVIP-18.
Note: This commitment Incorporate into ISI Program prior to RFO-supersedes the previous commitment (References 4 & 5) to 17*
inspect the Core Spray Spargers and piping in accordance with IEB 80-13.
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l PROCEDURE NUMBER 0.42 l
REVISION NUMBER 1.2 l
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