ML17221A708
| ML17221A708 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 04/01/1988 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17221A707 | List: |
| References | |
| GL-83-28, NUDOCS 8804110275 | |
| Download: ML17221A708 (3) | |
Text
ENCL'OSURE 1
SAFETY EVALUATION REPORT GENERIC L T R
M..
(PART 2)
S.
LUCI NUL R
PL NT, S
D C
N On February 25, 1983, both of the sc~am 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 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, 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 I 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 Comission (NRC) requested (by Generic Letter 83-28 dated July 8, 1983
)
all licensees of operating reactors, applicants for an operating license, and holders of construction permits to respond to generic issues raised by the l,
analyses of these
.two ATWS events.
8804120275 880401 PDR ADOCg, 05000335 P
This report is an evaluation o< the response submitted by Florida Power and Light Company, the licensee for the St. Lucie Nuclear Plant, Units I and 2, for Item 2. 1 (Part 2) of Generic Letter 83-28.
The actual document reviewed as part of this evaluation is listed in the references at the end of the report.
Item P. 1 (Part 2) requires the licensee/applicant tn confirm that an intetface has been established with the NSSS vendor or with the vendors of each of the components of the Reactor Trip System.
This interface should include:
periodic communication between the licensee/applicant and the NSSS vendor 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 vendo~ technical information.
E'/ALUATION The licensee for the St. Lucie Nuclear Plant, Units I and 2, responded to the requirements of Item 2.l. (Part
".) with a submittal dated November 8, ~983".
The licensee stated in this submittal that Combustion Enqineerino (C-E) is the NSSS verdnr for the St. Lucie Nuclear Plant, Units I and 2, and that the RTS is included as part of the C-E interface program estab',ished for this plant.
The response al'so confirms that this interface program inc>udes both periodic communication between C-E and the licensee and positive feedback II 1
from the licensee in the form of signed receipts for technical information transmitted by C-E..
CONCLUSION We find that the licensee's statements confirm that a vendor interface program exists with the NSSS vendor for components that are required
+or performance of the reactor trip function.
This program meets the reauirements of Item 2. 1 (Part
- 2) of Generic Letter 83-28, and is therefore acceptable.
REFERFNCES 1.
NRC Letter, 0.
G. Eisenhut to all Licensees of Operatinq Reactors, Applicants for Operating License, and Holders of Construction Permits, "Required Actions Based nn Generic Implications of Salem ATWS Events (Generic Letter 83-28)," July 8, 1983.
2.
Florida Power and Light Company letter from J.
W. Williams to Darrell G. Eisenhut, NRC, November 8, 1983.
Oated:
Aori 1 1, 1988 Princi al Contributor:
A. Toalston