ML17334B075
| ML17334B075 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Cook |
| Issue date: | 04/02/1987 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17334B073 | List: |
| References | |
| GL-83-28, NUDOCS 8704090006 | |
| Download: ML17334B075 (5) | |
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SAFETY EVALUATION REPORT GENERIC 1
(PART 2)
VENDOR INTERFACE PROGRAMS (RTS COMPONENTS)
CL R
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On February 25, 1983, both of the scram circuit breakers at Unit 1 of'he Salem Nuclear Power Plant failed to open upon an automatic reactor trip signal from the reactor protection system.
This incident was terminated manually by the operator about 30 seconds after the initiation of the automatic trip signal.
The failure of the circuit breakers was determined to be related to the sticking of the undervoltage trip attachment.
Prior to this incident, on February 22, 1983, Unit 1 of the Salem Nuclear Power Plant, an automatic trip signal was generated based on steam generator low-low level durino plant start-up.
In this
- case, the reactor was tripped manually by the operator almost coincidentally with the automatic trip.
Following these incidents, on February 28, 1983, the NRC Executive Director for Operations (EDO), directed the staff to investigate and report on the generic implications of these occurrences at., Unit 1 of the Salem Nuclear Power Plant.
The results of the staff's inquiry into the generic implications of the Salem unit incidents are reported in NUREG-1000, "Generic Implications of the ATWS Events at the Salem Nuclear Power Plant."
As a result of this investigation, the Commission (NRC) requested (by Generic Letter 83-28 'dated iluly 8, 1983
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all licensees of operating reactors, applicants for an operating license, and holders of construction permits to respond to generic issues raised by the analyses of these two ATMS events.
E 870409000b'70402 PDR ADOCK 05000315 P
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This report is an evaluation of the response submitted by the Indiana and Michigan Electric Company, the licensee for the Donald C.
Cook Nuclear Power Plants, Units 1,2, for Item 2. 1 (Part 2) of Generic Letter 83-28.
The actual documents reviewed as part of this evaluation are listed in the references at the end of the report.
Item 2.1 (Part 2) requires the licensee/applicant to confirm that an interface has been established with the NSSS or with the vendors of each of the components of the Reactor Trip System which includes:
periodic communication between the licensee/applicant and the NSSS or the vendors of each of the components of the Reactor Trip System, and a system of positive feedback which confirms receipt by the licensee/applicant of transmittals of vendor technical information.
EVALUATION The licensee for the Donald C.
Cook Nuclear Power Plant, Units 1,2, responded to the requirements of Item 2.1 (Part 2) with submittals dated March 30, 1984, April 10, 1985, and December 31, 1986 The licensee confirms that the inter-3 4
face for the reactor trip system (RTS) includes annual contact with each com-ponent vender and a system of positive feedback with the component vendors.
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CONCLljSION We find the licensee's statements confirm that a vendor interface program exists with the RTS vendors for the components that are required for the reactor trip function.
This program meets the requirements of Item 2.1 (Part 2) of the Generic Letter 83-28, and is therefore acceptable.
REFERENCES 1.
NRC Letter, 0.
G. Eisenhut to all Licensees of Operating Reactors, Applicants for Operating License, and Holders of Construction
- Permits, "Required Actions Based on Generic Implications of Salem ATWS Events (Generic Letter 83-28)," July 8, 1983.
2.
Indiana and Michigan Electric company letter to NRC, M. P. Alexich to D.
G. Eisenhut, Director, Division of Licensing, "Required Actions Based on Generic Implications of Salem ATWS Events (Generic Letter 83-28)," March 30, 1984.
3.
Indiana and Michigan Electric Company letter to NRC, M. P. Alexich to H.
R. Denton, Director, Division of Licensing, "Additional Information Requested in Response to Generic Letter 83-28," April 10, 1985.
4.
Indiana and Michigan letter to NRC, M. P. Alexich to Office of Nuclear Reactor Regulation, "Generic Letter 83-28, Items 2. 1 and 2.2 Pertaining to Vendor Information Control System (VICS)," December 31, 1986.