ML20101U082
| ML20101U082 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 01/24/1985 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-85-139-000 (RDC-115(84)), PT21-85-139-000, NUDOCS 8502060573 | |
| Download: ML20101U082 (2) | |
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f THE CLE!/ ELAND ELECTRIC iLLUMIN ATING COMPAl4Y P.o. BOX 5000 - CLEVELAND, OHIO 44101 - TELEPHONE (216) 622-9800 - lLLUMINATING BLDG. - 55 PUBLICSQUARE Serving The Best Location in the Nation
- I MURRAY R. EDELMAN VICE PRESIDENT NUCLEAR Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE: Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Potential Leakage Path in Electronics Housing Threads of Transmitters Supplied by Rosemount (RDC 115(84)]
Dear Mr. Keppler:
This letter serves as our final report pursuant to 10CFR50.55(e) concerning the Rosemount Model 1153 Series B Pressure Transmitters.
Mr. James McCormick-Barger of your office was notified on September 19, 1984, by Mr. V. Higaki of The Cleveland Electric Illuminating Company (CEI) that this problem was being evaluated. Our interim report on this subject was dated October 16, 1984.
This report contains a description of the deficiency, an analysis of safety implication and the corrective action.
Descrintion of Deficiency Rosemount supplied two hundred forty (240) Model 1153 Series B Pressure Transmitters to the Perry Nuclear Power Plant (PNPP), Units 1 and 2, under Procurement Specification 604. On September 10, 1984, Rosemount notified PNPP, under 10CFR21 regulations concerning a potential leakage path in the seal of the threads between the sensor module and the electronics housing of those transmitters manufactured after January 10, 1984.
Further investigation by both Rosemount and our Project Organization, revealed that sixty-three (63) transmitters were possibly affected. Thirty-six (36) had been installed, thirty-two (32) on Unit 1 and four on Unit 2, with the remainder located in the PNPP Warehouse.
Analysis of Safety Implication There is a possibility that this leak path could allow moisture from the ambient surrounding environment to enter the electronics housing during abnormal operating conditions. This moisture may cause the transmitter to stop functioning by causing the output signal to indicate excessively high or low conditions. The resultant actions may jeopardize safe shutdown of the reactor vessel during abnormal operating conditions.
8502060573 850124 JAN 2 81985 PDR ADOCK 05000440 g
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Mr. James G. K ppist J nuary 24, 1985 i
Corrective Action Nonconformance Reports TAS 93 and TAS 94 were issued for Unit I and Unit 2, respectively, to document our corrective action.-
Rosemount now has indicated that a twelve (12) hour curing period of the sealant at the housing / module neck joint at elevated temperatures provides a more predictable seal...Six test samples were produced by Rosemount with this
. process. These samples were successfully tested in a LOCA simulation test ending on October 3, 1984.
A11' sixty-three (63) transmitters will be shipped back to Rosemount where they
.will be disasceabled, cleaned and reassembled per Rosemount's new process,.
including 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> of curing at 200*F. After receipt from Rosemount, the
-installation of these refurbished transmitters will be accomplished under the supervision of our Project Organisation. It is presently expected that installation of Unit 1 transmitters will be completed by May 3, 1985. Unit 2 1
transmitters will be installed consistent with the Unit 2 construction 1
-schedule.
I j
Please call if there are any additional questions.
Sincerely,.
II 4
ay Murray k. Ede man Vice President Uuclear Group MRE:pab 1
1 cc:
Mr. J. A. Grobe j
USNRC, Site Office Mr. D. E. Keating l
l USNRC, Site Office Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. -205*5 U.S.. Nuclear. Regulatory Commission c/o Document Management Branch l
Washington, D.C.
20555 Records Center, SEE-IN Institute of Nuclear Power. Operations-t 1100 circle'75 Parkway, Suite 1500 Atlanta, Georgia 30339
.