ML20198E540
| ML20198E540 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 05/14/1986 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-86, REF-PT21-86-188-000 (RDC-145(86)), PT21-86-188, PT21-86-188-000, PY-CEI-OIE-0207, PY-CEI-OIE-207, NUDOCS 8605280045 | |
| Download: ML20198E540 (4) | |
Text
Ms THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY P O. BOX 5000 - CLEVELAND, OHIO 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLOG.
- 55 PUBLIC SQUARE Serving The Best Location in the Nation MURRAY R. EDELMAN VICE PRESIDENT NUCUAR May 14, 1986 PY-CEI/0IE-0207 L Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roasevelt Road Glen Ellyn, Illinois 60137 RE: Perry Nuclear Power Plant Docket No. 50-441 Kaman High Voltage Power Supply Circuitry (RDC 145(86)]
Dear Mr. Keppler:
Attached is the final report pursuant to 10CFR Parts 21 and 50.55(e) concerning the high voltage power circuitry supplied by Kaman Instrument Co. for use in the Perry Nuclear Power Plant (PNPP) Units 1 and 2 Post Accident Radiation Monitoring Systems (D19).
Mr. W. Forney of your office was verbally notified March 26, 1986, that this was being evaluated per Deviation Analysis Report 262.
Our initial 10CFR21 report for PNPP Unit 1 was filed on April 3, 1986, and our initial 10CFR50.55(e) report for PNPP Unit 2 was filed on April 25; 1986. This report furnishes all information required by 10CFR21.21(b)(3) and meets the intent of 10CFR50.55(e)(3).
Please call if there are any additional questions.
Sincerely, Murray R. E Vice President Nuclear Group MRE:sab B605280045 060514 k j @ jggg PDR ADOCK 05000441 5
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Mr. J. G. Kspplar May 14.'1986 PY-CEI/0IE-0207 L 4
cc:
Mr. J. A. Grobe USNRC, Site Office r
Mr. J. J. Stefano Project Manager Licensing Branch 1 j
i Division of Boiling Water Reactor Licensing i
U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Director (3 copies)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission i
Washington, D.C.
20555 U.S. Nuclear Regulatory Commission c/o Document Management Branch
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Washington, D.C.
20555 Records Center. SEE-IN I
Institute of Nuclear Power Operations 1100 circle, 75 Parkway. Suite 1500 Atlanta, Georgia 30339 j
Mr. Frank Bergamo, Box 20 1
Kaman Instrumentation Corporation P.O. Box 7463 Colorado Springs. CO 80933 i
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Attcchment to PY-CEI/0IE 0207 L May 14, 1986 PERRY NUCLEAR POWER PLANT 10CFR21/10CFR50.55(e) REPORT Docket Numbers 50-440; 50-441 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 comply or contains a defect.
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-Kaman High Voltage Power Supply (P/N 450447) in Microcomputers furnished for the Post Accident High Range Radiation Monitoring Systems (1&2D19) at Perry Nuclear Power Plant.
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Identification of the firm supplying the basic component which fails to comply or contains a defect.
-Kaman Instrumentation Company 1500 Garden 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 such defect or failure to comply.
T
-The power supply voltage was found to be oscillating between 240 and 1030 volts at 100 HZ. during Unit 1 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 volts when the pcwer was turned on to the microprocessor. This voltage spike exceeds the manufacturers hypot test voltage of 1000 volts for the MI cable and causes a momentary insulation failure in the cable, which results in the oscillating voltage. Continued voltage oscillation eventus11y causes complete MI cable failure. This problem also applies to the Unit 2 equipment.
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PERRY NUCLEAR POWER PLAfff 10CPR21/50.55(e) REPORT; Docket Nos. 50-440; 50-441 Attachment to PY-CEI/0IE 0207 L May 14, 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 ascertain post accident radiation in these areas.
5.
The date of receipt of information reasonably indicating that a condition reportable under 10CPR21 has been identified at PNPP.
reh 26 198'6 6.
The Number and location of all such components 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 Complex - E1. 638' (1D19J100 and 1D19J200). The four cards supplied for PNPP Unit 2
equipment are stored in the Project Organization warehouse.
7.
The corrective action which has been, is being, or will be taken; the name of the individual or organization responsible for the action; and advice concerning the length of time that the action.
has been or will be taken to complete
-Nonconformance Report PPDS-835. TAS-125 and Field Change Request 01722 were generated to track the nonconformance and to provide a means for resolution upon completian of the Project Organization engineering investigation. The corrective action relative to the closure of the Unit 1 Nonconformance Report, PPDS-835, has been completed. These actions included return of the affected circuit board cards to Kaman Instrumentation for circuitry modification which limits the voltage spike on system startup to less than 1000 VDC, and retest of the system to verify correction of the condition as reported. The corrective actions pecessary for resolution of Nonconformance Report TAS 125 and the closure of the Unit 2
deficiency will be completed consistent with the Unit 2 construction schedule.
8.
Any advice that has been, is being, or will be given to other purchasers or licensees.
-At this time, we have no advice for other purchasers or licensees.
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