ML20092M854
| ML20092M854 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 06/15/1984 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (NMP2L-0083), (NMP2L-83), NUDOCS 8407020402 | |
| Download: ML20092M854 (2) | |
Text
w,;-rs M V NIAGARA R UMOHAWK NIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST, SYRACUSE, N.Y.13202/ TELEPHONE (315) 474-1511 June 15,1984 (NMP2L_0083)
Mr. R. W. Starostecki, Director U.S. Nuclear Regulatory Commission Region I Division _ of Project and Resident Programs 631 Park' Avenue King of Prussia, PA 19406 Re: Nine Mile Point Unit 2 Docket No. 50-410
Dear Mr. Starostecki:
Enclosed is a final report in accordance with 10CFR50.55(e) for the problem concerning feedwater piping spools _'(55(e)-84-05). This problem was
. reported in a telephone conversation between T. Loomis (Nine Mile Point Unit 2 Licensing)' and S. Collins of your staff on February 1,1984. An interim report was submitted via our letter dated March 5,1984.
Very truly yours, bN C. V. Mangan Vice President Nuclear Engineering & Licensing TRL:Ja Enclosure
-xc: Di ector of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC.20555-R. A. Gram, Resident Inspector 8407020402 840615 PDR ADOCK 05000410 S
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-NINE MILE POINT' UNIT 2 DOCKET N0, 50-410.
Final Report for a Problem
.Concerning Feedwater Piring Spools-(55(e)-84-05) j i
Description of>the Problem' Du. ring'.a-Stone'& Webster; Engineering Corporation audit of-I'TT Grinnell, it was l
observed that'the material-used in the fabrication of some feedwater piping
- spools did not meet all the impact testing requirements of ASME Secticn III.
-Certified Material Test Reports for the. material in question did not document
- ^
'the test' coupon _ heat treatment duration and temperature as. required by ASME l
Section III,:NB-2211.' Fu'ther inquiry revealed that the heat treatment of the r
test coup'on was in fact not. performed. Heat treatment of the test coupons is v
required to ensure that,the coupons reflect;the material conditions of the spoolLpiece. iEight feedwater pipe' spools.were affected.
The material. test ~ coupons with the same heat lot numbers as those of the eight feedwater pipe spools.have since been; heat treated,and impact tested.
Impact
' test results of:the coupons' indicated that seven spools meet the requirements l
-of ASME Section III. The coupon of the remaining spool piece did not meet the fimpact. test lateral; expansion criterion of ASME Section-III.
. Analysis of'SafetyJImplications.
-A detailed investigation of the spool piece that did not meet lateral zexpansion criterion, to determinecits suitability for use, was not performed.
ce
-Instead, this spool-piece willibe replaced with one meeting ASME.III C-
' requirements. Had the investigation indicated that the spool piece would not have performed its intended design function,ma possibility exists that the 4
-integrity ofathe reactor coolant-pressure boundary could have been.
Jjeopardizedt.Therefore, if.this problem.were to have remained uncorrected, it-
- could-have adversely:'affected the safe. operation.of the plant.-
~
- ~ Corrective Action r
t
?The spool. piece that did.not meet.ASME III requirements will be replaced by-September 14, 1984..
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