ML20150C664
| ML20150C664 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/14/1988 |
| From: | Martin R Office of Nuclear Reactor Regulation |
| To: | Bauer E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 8803210153 | |
| Download: ML20150C664 (3) | |
Text
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I March 14, 1988 e
Docket Nos.:
50-277/278 Mr. Edward G. Bauer, Jr.
Vice President and General Counsel Philadelphia Electric Company-2301 Market Street-Philadelphia, Pennsylvania 19101
Dear Mr.'Rauer:
SUBJECT:
USE OF MICR0 PROCESSORS IN PLANT SAFETY SYSTEM During the staff's reviews of documentation describing the compliance of the Peach Bottom Atomic Power Station with the Commission's regulation in 10 CFR 50.62 the staff learned that the reactor protection system (RPS) has been modified. Specifically, it is understood that Foxboro microprocessors have been included in the plant design.
The staff ~is interested in learning more about the licensee's evaluation of such design modifications with respect to whether they involved unreviewed safety questions and with respect to the degree of compliance of such modification with the applicable protection system design criteria.
Specifically, this includes subjects such as electrical separation, electrical isolation, control / protection interaction, time responses, set points, surveillance-intervals, testability and software verification and validation.
These subjects are sufficiently complex that a meeting between our staff's is most likely the appropriate vehicle to initiate the consideration of this subject.. In order to facilitate our praparation for such a meeting we request that you provide the evaluation and design modification packages, such as those referenced on drawing number 6280-M-352, applicable to this issue several weeks prior to the meeting.
We request that you prepare for this meeting to be held within 30 days of receipt of this letter.
Sincerely, 8803210153 bee 314 PDR ADOCK 05000277 P
/s/
Robert E. Martin, Project Manager Project Directorate I-2 Division of Reactor Projects I/II cc:
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March 14, 1988 Docket Nos.:
50-277/278 Mr. Edward G. Bauer, Jr.
Vice President and General Counsel Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvania 19101
Dear '<r. Bauer:
SUBJECT:
USE OF MICR0 PROCESSORS IN PLANT SAFETY SYSTEM During the staff's reviews of documentation describing the compliance of the Peach Bottom Atomic Power Station with the Commission's regulation in 10 CFR 50.62 the staff learned that the reactor protection system (RPS) has been modi fied. Specifically, it is understood that Foxboro microprocessors hr.ve been included in the plant design.
The staff is interested in learning more about the licensee's evaluation of such design modifications with respect to whether they involved unreviewed safety questions and with respect to the degree of compliance of such modification with the applicable protection system design criteria.
Specifically, this includes subjects such as electrical separation, electrical isolation, control / protection interaction, time responses, set points, surveillance intervals, testability and software verification and validation.
These subjects are sufficiently complex that a meeting between our staff's is most likely the appropriate vehicle to initiate the consideration of this subject.
In order to facilitate our preparation for such a meeting we request that you provide the evaluation and design modification packages, such as those referenced on drawing number 6280-M-352, applicable to this issue several weeks prior to the meeting.
We request that you prepare for this meeting to be held within 30 days of receipt of this letter.
Sincerely, fl
~
c
/ Robert E. Martin, Project Manager Project Directorate I-2 Division of Reactor Projects I/II cc:
See next page
D O
e D
Mr. E. G. Bauer, Jr.
Peach Bottom Atomic Power Station, Philadelphia Electric Company Units 2 and 3 cc:
Mr. J. S. Kemoer, Senior Vice President Mr. R. A. Heiss, Coordinator Philadelphia Electric Company Pennsylvania State Clearinghouse 2301 Market Street Governor's Office of State Planning Philadelphia, Pennsylvania 19101 and Development P. O. Box 1323 Troy R. Conner, Jr., Esq.
Harrisburg, Pennsylvania 17120 1747 Pennsylvania Avenue, N.W.
Washington, D.C. 20006 Mr. Thomas M. Gerusky, Director Bureau of Radiation Protection Philadelphia Electric Companv Pennsylvania Department of ATTN: Mr. D. M. Smith, Vice President Environmental Resources Peach Bottom Atomic Power Station P. O. Box 2063 Route 1, Rox 208 Harrisburg, Pennsylvania 17120 Delta, Pennsylvania 17314 Mr. Albert R. Steel, Chairman Mr. W. M. Alden Board of Supervisors Engineer-In-Charge-Licensing Peach Bottom Township Philadelphia Electric Company R. D. #1 2301 Market Street Delta, Pennsylvania 17314 Philadelphia, Pennsylvania 19101 Mr. Gary Mock Morgan J. Morris, III P. O. Box 09181 General Manager - Operating Services Columbus, Ohio 43209 Atlantic Electric P. O. Box 1500 Mr. Jack Urban 1199 Black Horse Pike General Manager, Production Pleasantville, New Jersey 08232 Delmarva Power and Light Company 800 King Street Resident Inspector Wilmington, Delaware 19899 U. S. Nuclear Reaulatory Commission Peach Bottom Atomic Power Station Mr. Tom Magette P. O. Box 399 Power Plant Research Program Delta, Pennsylvania 17314 Department of Natural Resources B-3 Regional Administrator, Region I Tawes State Office Building U. S. Nucleer Regulatory Commission Annapolis, Maryland 21401 475 Allendale Road King of Prussia, Pennsylvania 19406 Mr. Roland Fletcher Department of Environment 201 West Preston Street Baltimore, Maryland 21201