ML20214F623
| ML20214F623 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 11/18/1986 |
| From: | Lindblad W PORTLAND GENERAL ELECTRIC CO. |
| To: | Baer R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 8611250371 | |
| Download: ML20214F623 (2) | |
Text
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POlfTLAND GENEHAL ELEcTurc COMPANY t2i S. W. S ALM ON STREET WILL4AM.J. LIN D B LAD Po RT LA N D. O R EGO N 97204 1503)226-8875 November 18, 1986 Trojan Nuclear Plant Docket 50-344 License NPF-1 Mr. Robert L. Baer, Chief Engineering and Generic Covununications Branch Division of Emergency Proparedness and Engineering Response Office of Inspection and Enforcement U.S. Nuclear Regulatory Comission Washington DC 20555
Dear Mr. Baer:
Coments on Draf t IE Information Notice on October 24, 1986, a redraft of the Information Notice concerning steam generator hydraulic snubber failures was forwarded to us for review and coment. The draft Information Notice is based primarily upon Licensee Event Report (LER) 86-13, Supplement 1 to that LER, and our letter dated July 24, 1986,. that provided coments on the initial draf t of the Informa-tion Notice. We have reviewed the redraft of the Information Notice and have made a few coments to clarify certain aspects of the technical information. These coments are provided as an attachment to this letter.
Otherwise, we found the Information Notice to be correct in describing the hydraulic snubber failures at Trojan.
If you have any questions concerning these comments, please do not hositate to contact me.
Sincerely, 2 f $,f
=<--r Attachment 8611250371 861118 gf'p/
f PDR ADOCK 05000344 PDR gq ib
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_b Trojan Nuclear Plant Mr. Robert L. Baer Docket 50-344 November 18, 1986 License NPF-1 Attachment Page 1 of 1 COMMENTS ON DRAFT INFORMATION NOTICE _
1.
In order to clarify the specific nature of the snubber failures, it is recommended that on Page 2 of 3 that the second paragraph should be changed to read as follows:
"The revised Technical specifications for testing the snubbers required testing of each snubber that had failed its test during the previous testing program. Therefore, the 16 steam generator hydraulic snubbers were again tested during the refueling outage that began in April 1986. The results of the testing indicated 12 failed snubbers - four with excessive drag, four with high bleed rates at faulted load, two with no bleed rate at faulted load, one with excessive drag and high bleed rate, and one with high bleed in compression and no bleed in tension. The snubbers with no bleed rate cleared themselves upon load reversal."
- 2., Page 1 of 1, first paragraph, last sentence, should read:
"This discovery delayed submittal of LER 85-13, which was being prepared at the time."
- 3., Page 1 of 1, Item 2, should read:
"2.
The second additional area of multiple snubber failures involved the four main steam line hydraulic snubbers (two 70-Kip and two 130-Kip Bergen-Paterson units). The snubbers were declared inoperable without testing upon discovery of the steam generator hydraulic snubber failures."
The main steam line hydraulic snubbers were not tested. The proposed wording in the draft Information Notice does not reflect this.
MHM/kal 1283W.1186
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