ML18017B259
| ML18017B259 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 09/17/1980 |
| From: | Mcduffie M CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-80-19, NUDOCS 8010150288 | |
| Download: ML18017B259 (1) | |
Text
Carolina Power & Light Company September 17, 19801
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Mr. J. P. O'Reilly Region II U. S. Nuclear Regulatory Commission 101 Marietta Street, N.W.
Atlanta, Georgia 30303 SHEARON HARRIS NUCLEAR POWER PLANT UNIT DOCKET NOS 50-402, AND 50-4 SUPPLEMENTAL RESPONSE TO IE BUL
-19
Dear Mr. O'Reilly:
As committed to in our August 29, 1980 response to IE Bulletin 80-19, Carolina Power
& Light Company (CP&L) has completed its review of the Reactor Protection System for the Shearon Harris Nuclear Power Plant (SHNPP) with regard to the use of mercury-wetted matrix relays.
That review has deteradned that the only application of mercury-wetted relays in reactor trip circuitry at the SHNPP is in the 7300 Process Control System.
These relays are used for temperature channel test inputs from resistor thermal devices and not used in scram circuits.
Therefore, the specific concerns of IE Bulletin 80-19 do not apply to the SHNPP.
Additionally, as requested by Revision 1 to IE Bulletin 80-19, CP&L has determined that approximately five man-days of effort were required for prepar-ation of this response.
This time was split between CP&L, its NSSS vendor and the Architect-Engineer.
If you have any questions on this subject, please contact our staff.
CP&L plans no further response to this bulletin.
Yours very truly, M. A. McDuffie Senior Vice President Engineering
& Construction JJS/MAM/dk cc:
Director, Division of Reactor Operations Inspection Office of Inspection and Enforcement United States Nuclear Regulatory Commission Washington, D. C.
20555
'411 Fayetteville Street
~ P. O. Box 1551
~ Raleigh, N. C. 27602 Oli"&'ECIALCOPY