ML20133G172
| ML20133G172 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 09/30/1985 |
| From: | Opeka J NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| REF-PT21-85-414-000 F0844A, F844A, PT21-85-414, PT21-85-414-000, SD-82, NUDOCS 8510150233 | |
| Download: ML20133G172 (2) | |
Text
__
O N UTIEJTIES o.nor.i Ome... s ioon sir. B.,nn, conn.ci cui
'2,fDIN,,$. '[II[
P.O Box 270
.x m..a* a awa ce~
HAnTFO AD. CONN ECTICUT 061414270 L
L
- C.T',' C ; ; ' g -
(2e 665-sooo September 30, 1985 Docket No. 50-423 F0344A Dr. Thomas E. Murley Regional Administrator U. S. Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, PA 19406
References:
(1)
J. F. Opeka letter to T. E. Murley, F0779A, dated June 6, 1985.
(2)
- 3. F. Opeka letter to T. E. Murley, F0788A, dated August 29, 1985.
Dear Dr. Murley:
Millstone Nuclear Power Station, Unit No. 3 Reporting of Potential Significant Deficiencies in Accordance with 10CFR50.55(e):
Core Exit Thermocouples (50-82)
In a May 9,1985 telephone conversation between your Mr. T. Rebelowski and our Mr. R. K. McCarthy, Northeast Nuclear Energy Company reported a potential significant deficiency in the construction of Millstone Unit No. 3 in accordance with 10CFR$0.55(e). The potential significant deficiency involved the core exit thermocouple systems provided by Westinghouse.
1 As noted in Reference (1), while performing equipment qualification testing of the core exit thermocouples, Westinghouse noted that the total system error exceeded the errors assumed in the Westinghouse Emergency Response Guidelines. These Guidelines were used to develop the Emergency Operating Procedures.
I Westinghouse recently completed an environmental qualification test on the core exit thermocouples, connectors, potting adapters, splices, and reference junction boxes, however, their analysis of the test results are not complete at this time.
As such, the corrective action and final report cannot be provided until additional information is obtained. We will provide an update on this matter by October 30,1985.
Very truly yours, NORTilEAST NUCLEAR ENERGY COMPANY 0D101D0233 y h 423 PDR ADOCK pgg
~
0$
J.F.Op6ka v
Senior Vice President 10
.s 1
I
- k 2-cc:
Mr. 3. M. Taylor, Director Division of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20353 l
l l
l
_ _ _ _ _ _.