ML20202F460
| ML20202F460 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 04/03/1986 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-86, REF-PT21-86-115-000 (RDC-145(86)), PT21-86-115, PT21-86-115-000, PY-CEI-OIE-0186, PY-CEI-OIE-186, RDC-145(86), NUDOCS 8604140160 | |
| Download: ML20202F460 (4) | |
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f THE CLEVELAND ELECTR PO. BOX 5000 - CLEVF 6NO. OHIO 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLDG - 55 PUBLIC SQUARE Semng The Best Location in the Nation AURRAY R. EDELMAN VICE PREStoENT NUCLEAR April 3, 1986 PY-CEI/01E 0186 L 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 Docket No. 50-440 Kaman fligh Voltage Power Supply Circuitry (RDC 145(86)]
Dear Mr. Keppler:
Enclosed is a copy of the written report concerning Kaman liigh Voltage Power Supply Circuitry cupplied to the Perry Nuclear Power Plant (PNPP).
Mr. W. Forney of your office was verbally notified on March 26, 1986 that this item is being evaluated per Deviation Analysis Report 262.
This report is being cubmitted pursuant to 10CFR21 for PNPP Unit 1.
Verbal notification was made to the NRC because a potential generic implication may exist for other nuclear pcwer licensee to whom this component has been cupplied. Evaluation of the information required by 10CFR21.21(b)(3) ic ctill ongoing which has led to the submittal of this written report outside the time frame identified in 10CFR21.
If you require further information at this time, please call.
Sincerely, h
[
G Murr P.. Edelman Vice President Nuclear Group MRE:sab Attachment APR 7 8861 ry ts604140160 860403 PDR ADOCK 05000440 PDR S
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Mr. James G. KopplGr April 3, 1986 PY-CEI/0IE 0186 L cc:
Mr. J. A. Grobe USNRC. Site Office Director (3 copies)
Office.of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 U. S. Nucicar Regulatory Commission c/o Document Management Branch Washington, D.C. 20555 Records Center, SEE-IN Institute of Nuclear Power Operations 1100 Circle. 75 Parkway. Suite 1500 Atlanta, Georgia 30339 Mr. Frank Bergamo Box 20 Kaman Instrumentation Corporation P.O. Box 7463 Colorado Springs, CO 80933 1
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Attechment to PY-CEI/OIE 0186 L April 3, 1986 PERRY M! CLEAR POWER PLANr 10CFR21 REPORT Docket Number 50-440 l
l 1.
The name and address of the individual or individuals informing the NRC.
-Mr. R. G. Soit The Cleveland Electric Illuminating Company 10 Center Road Perry. Ohio 44081 2.
Identification of the activity or the basic component supplied which fails to couply or contains a defect.
-Kanan High Voltage Power Supply (P/N 450447) in Microcomputers 1D19-J100 and 1D19-J200 for the Post Accident High Range Radiation Monitoring System at Perry Nuclear Power Plant Unit #1 (Control Complex E1. 638'-0).
3.
Identification of the firm supplying the basic component which fails to comply or contains a defect.
-Kaman Instrumentation Company 1500 Carden of the Gods Road Colorado Springs. Colorado 80933-7463.
4.
The nature of the defect or failure to comply and the safety hazard which is created or could be created by cuch defect or failure tc comp 1.
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-The power supply voltage was found to be onci11ating between 240 and 1030 volts at 100 HZ. during troubleshooting activities.
Investigation was conducted by disconnecting the mineral insulated (MI) cable and the detector from the high voltage power supply.
With the power supply set to operate at 800 volts, the power supply output voltage was found to spike to 1300 volta when the power was turned on to the microprocecoor. This voltage apike exceeds the manufacturers hypot test voltage of 1000 volta for the MI cable and causen a momentary insulation failure in the cable, which results in the oscillating voltage.
Continued voltage oscillation eventually causes complete MI cabic failure.
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PERRY NUCLEAR POWER PL/Mr 10CFR21 REPORT; Docket No. 50-440 Attachment to FY-CEI/0IE 0186L April 3, 1986 Page 2
-The MI cable failure results in a voltage signal which could reduce the range of radiation detection. An erroneous indication from the detectors would not provide accurate quantitative information to plant personnel for determination of accident severity in the containment and drywell.
It should be noted that other means are available to accertain post accident radiation in these areas.
5.
The date of receipt of information reasonably indicating that a condition reportable under 10CFR21 has been identified at PNPP.
-March 26, 1986 6.
The Number and location of all such componenta obtained for Perry Plant.
-The Kaman Post Accident Radiation Monitor Microprocessor has a total of two power supply circuit boards, each Plant Unit has two Microprocessors. Therefore, a total of four high voltage power supply cards are installed in PNPP Unit 1 Control Compicx - El 638' (1D19J100 and 1D19J200). The four cards supplied for PNPP Unit 2 equipment are stored in the Project Organization varchouce.
7.
The corrective action which haa been, is being, or will be taken; the naec of the individual or organization responsible for the action; and advice concerning the length of time that has been or will be taken to complete the action.
-Nonconformance Report PPDS-835 TAS-125 and Field Change Request 01722 have been generated te track the nonconformance and to provide a means for resolution upon completion of the Project Organization engineering investigation.
Currently, Project Organization and the vendor are working together to determine the cauce of the nonconformance and the corrective action for these power supplies. Corrective action has already included replacement of the failed MI cables. All corrective actions and repair of the components will be completed prior to exceeding 5% power, consistent with the schedule for completion of preoperational testing. Thic completion milectone hac previously been documented in our February 27, 1986 letter (PY-CEI/0IE-178L).
8.
Any advice that has been, in being, or will be given to other purchacero or licencees.
-At this time, we have no advice for other purchanerc or licenseca.
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