ML18092B257
| ML18092B257 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 08/25/1986 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML18092B256 | List: |
| References | |
| GL-83-28, NUDOCS 8608280234 | |
| Download: ML18092B257 (4) | |
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SAFETY EVALUATION REPORT GENERIC LETTER 83-28, ITEM 2.1 (PART 1)
EQUIPMENT CLASSIFICATION (RTS COMPONENTS)
SALEM NUCLEAR GENERATING STATION, UNITS 1&2 DOCKET NOS. 50-272/311 INTRODUCTION AND
SUMMARY
On February 25, 1983, both of the scram circuit breakers at Unit 1 of the 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 ~f 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, at Unit 1 of the Salem Nuclear Power Plant, an automatic trip signal was generated based on steam generator low-low level during 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,luly 8, 19831) 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 ATWS events.
.... This report is an evaluation of the response submitted by Public Service Elec,tric and Gas Company, the licensee for the Salem Nuclear Generating Station, Units 1&2, for Item 2.1 (Part 1) 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 1) requires the licensee to confirm that all Reactor Trip System components are identified, classified and treated as safety-related as indicated in the following statement:
Licensees and applicants shall confirm that all components whose functioning is required to trip the reactor are identified as safety-related on documents, procedures, and information handling systems used in the plant to control safety-related activities, in-cluding maintenance, work orders, and parts replacement.
EVALUATION The licensee for the Salem Nuclear Generating Station, Units 1&2 responded to the requirements of Item 2.1 (Part 1) with submittals dated March.82, March 143, April 74, April 85 and May 316, 1983.
The March 8, March 14 and April 7 sub-mittals described the licensee's program for upgrading the equipment classifica-tion system at Salem 1.
The program included the development of a Q-list which identified activities, services, structures, components and systems to which
'. safety-related classification applied for work orders and station procurement documents.
These earlier submittals referred only to the Salem 1 plant. The later submittals dated April 8 and May 31, 1983, confirmed that the program for Salem 2 had also been similarly upgraded..
CONCLUSION Based on our review of these responses, we find the licensee's statements con-firm that a program exists for identifying, classifying and treating components that are required for performance of the reactor trip function as safety related.
This program meets the requirements of Item 2.1 (Part 1) of the Generic Letter 83-28, and is therefore acceptable.
REFERENCES
- 1.
NRC Letter, D. 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.
Letter, R. A. Uderitz, Public Service Electric and Gas Co., to R. A. Starostecki, NRC, March 8, 1983.
- 3.
Letter, R. A. Uderitz, Public Service Electric and Gas Co., to D. G. Eisenhut, NRC, March 14, 1983.
REFERENCES (CONT.)
- 4.
Letter, R. A. Uderitz, Public Service Electric and Gas Co., to D. G. Eisenhut, NRC, April 7, 1983.
- 5.
Letter, R. A. Uderitz, Public Service Electric and Gas Co., to D. G. Eisenhut, NRC, April 8, 1983.
- 6.
Letter, R. A. Uderitz, Public Service Electric and Gas Co., to D. G. Eisenhut, NRC~ May 31, 1983.