ML18101A909
| ML18101A909 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 08/21/1995 |
| From: | Eric Simpson Public Service Enterprise Group |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| LR-N95116, NUDOCS 9508250135 | |
| Download: ML18101A909 (2) | |
Text
4*-.;
. E. C. Simpson Public Service Electric and Gas
- Company Public SeNice Electric and Gas Company P.O. Box 236, Hancocks Bridge, NJ 08038 609-339-1700 Senior Vice President
- Nuclear Engineering AUG 211995 LR-N95116 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Gentlemen:
ALLOY 600 STEAM GENERATOR MECHANICAL TUBE PLUGS SALEM GENERATING STATION UNIT NOS. 1 & 2 FACILITY OPERATING LICENSE NOS. DPR-70 & DPR-75 DOCKET NOS. 50-272 & 50-311 PSE&G submitted a letter to the NRC on January 30, 1995 (LR-N95007) to provide additional information for Salem Units 1 and 2 concerning the recent industry experience with stress corrosion cracking of Alloy 600 Thermally Treated (TT) Steam Generator tube plugs.
This information included:
(a) the number of Alloy 600 TT tube plugs that are present in the Salem Steam Generators that have not been repaired or replaced, (b) the basis for why the Justification for Continued Operation (JCO) contained in Westinghouse WCAP 12244, Revision 3 is still valid for the remaining Alloy 600 TT plugs that have not been replaced, and (c) a commitment to evaluate the impact of Addendum 3 of WCAP-12244, Revision 3, upon issuance by Westinghouse, on the current Salem Units 1 and 2 Action Plans to replace/repair the Alloy 600 mechanical tubes developed in response to NRC Bulletin 89-01 and Supplements.
The results of this evaluation and any changes to the Action Plan schedule for repair/replacement, if necessary, were to be submitted to the NRC within 30 days of the next scheduled outages for Units 1 and 2.
The recent industry experience required Westinghouse to revise the corrosion algorithm presented in WCAP-12244, Revision 3 (Addendum 3) for determining the repair/replacement schedule for the Alloy 600 TT plugs.
Based on the recalculated useful life for the Alloy 600 TT hot leg plugs, repair/replacement of the hot leg plugs during the next scheduled refueling outage, or outage of duration greater than 30 days is required.
Salem Unit 2 currently has a total of 44 tube plugs manufactured from Alloy
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Document Control Desk rn..:.1ii9*5116 2
AUG 211995 600 TT material which have not been repaired/replaced.
Therefore, PSE&G has opted to repair/replace the remaining 44 Alloy 600 plugs during the current Salem Unit 2 outage in accordance with our response to NRC Bulletin 89-01 and WCAP-12444, Revision 3 (Addendum 3).
For Salem Unit 1, this issue is not of concern since all Alloy 600 hot leg plugs have been repaired/replaced.
Repair/replacement of the Alloy 600 cold leg plugs is required to be completed by the end of the year 2000 based on the most recent corrosion algorithm provided in WCAP-12444, Revision 3 (Addendum 4).
PSE&G will aiso repair/replace the Alloy 600 cold leg plugs during the current Salem Unit 1 and 2 outages.
Should you have any questions on this submittal, please contact us.
Sincerely, c
Mr. T. T. Martin, Administrator - Region 1 U. s. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. L. N. Olshan, Licensing Project Manager -
Salem U. s. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 14E21 Rockville, MD 20852 Mr. c. s. Marschall (S09)
USNRC Senior Resident Inspector Mr. Kent Tosch, Manager, IV NJ Department of Environmental Protection Division of Environmental Quality Bureau of Nuclear Engineering CN 415 Trenton, NJ 08625 95-4933