ML20133D774
| ML20133D774 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 07/25/1985 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| (RDC-140(85)), NUDOCS 8508070454 | |
| Download: ML20133D774 (2) | |
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M THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY P.O. BOX 5000 - CLEVELAND, OHIO 44101 - TELEPHONE (216) 622-9809 - ILLUMINATING BLDG.
- 55 PUBLIC SQUARE Serving The Best Location in the Nation July 25, 1985 MURRAY R. EDELMAN PY-CEI/OIE 0082 L VICE MtESIDENT NUCUAR 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 Setpoint Methodology Evaluation of Standby Liquid Control Tank Level Detector
[RDC 140(85)]
Dear Mr. Keppler:
This letter is a final report pursuant to 10CFR50.55(e) con-cerning the Standby Liquid Control (SLC) tank level transmitter which had an accuracy exceeding the tolerance of the alarm setpoint.
This discrepancy was identified during the Licensing Review Group BWR Owners Instrument Setpoint Methodology Program.
This item was reported by telephone to Mr. R. Knop of your office on June 25, 1985 by Mr.
B. D. Walrath of The Cleveland Electric Illuminating Company (CEI).
This item has been evaluated per Deviation Analysis Report No. 244.
Description of Potential Deficiency During the instrument setpoint methodology program, it was determined that the SLC tank level transmitter used to activate the high/ low alarms had an accuracy of 18 inches.
The specified tolerance of the alarm setpoint was il inch.
This level transmitter has a useable range of 400" which provides level indication for the entire tank.
This transmitter also actuates the tank high/ low alarms. The high/ low alarm is designed to ensure that an adequate volume of sodium pentaborate solution is available and to prevent tank overflow.
Analysis of Safety Implications The insufficient accuracy of the SLC tank level transmitter could result in a delay in identifying that the tank level fell below the Technical Specification limit or that the tank level was approaching the overflow level.
8508070454 850725 PDR ADOCK 05000440
/D OUL 291985_%M
i Mr. Jemma G. Ksppler July 25, 1985 PY-CEI/OIE 8082 Corrective Action General Electric has analyzed the accuracy requirements and determined that an instrument with a range of 100 inches and an accaracy of 12.064 inches would be acceptable.
A design change (FDDR-KL1-6150) to effect the installation of a new level transmitter with the required accuracy has been initiated.
- Also, the affected data sheet in Design Specification 301 will be revised.
This is the final report on this item.
If you have any questions, please call.
Sincerely, Murray R. Edelman Vice President Nuclear Group MRE:sab cc:
J. A. Grobe USNRC SBB50 D.
E. Keating USNRC SBB50 Director Office of Inspection and Enforcement U.S.
Nuclear Regulatory Commission Washington, D.C.
20555 U.S.
Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 Records Center, SEE-IN Institute of Nuc' ear Power Operations 1100 Circle 75 carkway, Suite 1500 Atlanta, Georgia 33039
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