ML20212B881
| ML20212B881 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 07/30/1986 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-86-002, IEB-86-2, PY-CEI-OIE-0226, PY-CEI-OIE-226, NUDOCS 8608070258 | |
| Download: ML20212B881 (3) | |
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t THE CLEVELAND ELECTR P.O. BOX 5000 - CLEVELAND. OHIO 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLOG - 55 PUBLIC SoVARE Serving The Best Location in the Nation MURRAY R. EDELMAN sa vee msorN' July 30, 1986 PY-CEI/01E-0226 L Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 IE Bulletin 86-02 Static "0" Ring (SOR)
Differential Pressure Switchen
Dear Mr. Keppler:
The purpose of this letter is to provide our response to IE Bulletin 86-02,
" Static "0" Ring (SOR) Differential Pressure Switches." We have provided our response within 7 days as requested (Attachment 1).
We have determined that the specific pressure switches identified in the Bulletin have not been installed in any Perry plant systems and we do not intend to use them in the future.
This concludes our response to IE Bulletin 86-02.
Please feel free to contact me should you have any additional questions or comments.
Very truly yours, 8600070250 060730 7
PDR ADOCK 05000440 Murray R. Edelman G
PDR Senior Vice President Niicicar Group MRE:njc Attachment cc Jay Stiberg, Esq.
John Stefano (2)
K. Connaughton
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U.S. Nuclear Regulatory Commission Document Control Desk MO 4 1986 Washington, D.C.
20555
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Attcchment PY-CEI/01E-0226 L Response to IE Bulletin 86-02 Static "0" Ring (SOR) Differential Pressure Switches Actions Required of All Licensees:
1.
Within 7 days, submit a report on the extent to which SOR Model 102 or 103 l
differential pressure switches are installed (or planned) as electrical equipment important to safety, as defined in 10 CFR 50.49(b).
Include in the reports the model number of the switch, the system in which it is installed (e.g., low pressure safety injection), the application of the switch (e.g.,
water level measurement, system flow measurement), and the function of the switch (e.g., control of minimum flow recirculation valve). A negative report, if appropriate, is required.
Response
No SOR Model No. 102 or 103 differential pressure switches are installed (or planned to be installed) in safety-related electrical equipment at Perry. 35 design applications were identified in which other types of " Static-0-Ring" (SOR) pressure switches are used. Of these 35, six were found to be used in safety-related design applications, specifically in the Combustible Cas Control
- Hydrogen Analyzers. The specific model numbers for these SOR pressure switches are "6P3-K3-M4-C1A" and "15R3-K2-Y1-C1AX." Their function is to provide low pressure, low flow alarm indication on the post accident hydrogen analyzer sampling panels.
f i
X Attcch snt PY-CEI/01E-0226 L Actions Required of Licensees That Have SOR Model 102 or 103 Dif ferential Pressure Switches Installed in Systems That Are Subject to Limiting Conditions for Operation in Technical Specifications:
2.
Within 7 days, take positive action to assure that licensed reactor operators on duty are prepared for potential malfunctions of SOR switches.
3.
Within 30 days, conduct a special test of each SOR switch to determine if the switch and system function properly or if short term corrective actions are necessary. The tests are to determine if the switches / systems will respond acceptably on the first demand af ter being at system operating conditions for a period of time. The tests should be planned and conducted so as to minimize any potential adverse affects of the testing.
If any corrective action includes the replacement of SOR switches with mechanical dif ferential pressure switches by another manufacturer, the licensee should submit a technical justification, including a reliability demonstration. Repeat the special tests on a monthly basis untti two consecutive successful tests are attained.
4.
Report failures in accordance with 10 CFR 50.72 and 10 CFR 50.73.
5.
Within 60 days, develop, implement and submit a written report describing your interim performance monitoring program to provide continuing assurance that the performance of the switches and plant systems remains acceptably reliable untti long term corrective actions are fully implemented.
6.
Within 60 days, submit a written report which describes the margin and basis for switch actuation. The report should also describe the long term corrective actions to be taken, including the implementation schedule, the impacts of potential common mode fattures, and an analysis to demonstrate that the system involved will meet regulatory requirements and function reliably.
The report should include specific information on the installed SOR switches:
the manuf acturer's specified range for the switch, the nominal and allowable values for the cattbration setpoint in the Technical Specifications in the same terms as the manufacturer's specified range for the switch, the relative locations of the instrument taps for water level monitoring applications, sources of systematic errors such as the differences in elevations of the installation of condensing pots, and "as found" and any subsequent test data for any switch that does not conform to the Technical Specifications or is otherwise acceptable.
Response
No action is required with respect to Items 2-6 above since no SOR Hodel 102 or 103 differential pressure switches are installed at Perry.
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