ML19323D924
| ML19323D924 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 05/19/1980 |
| From: | Utley E CAROLINA POWER & LIGHT CO. |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NO-80-750, NUDOCS 8005220548 | |
| Download: ML19323D924 (2) | |
Text
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May 19, 1980 FILE: NG-3514(B)
SERIAL :3: NO-80-750 Office of Nuclear Reactor Regulation ATTENTION:
Mr. T. A. Ippolito, Chief Operating Reactors Branch No. 3 United States Nuclear Regulatory Comission Washington, D. C.
20555 BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS 1 AND 2 DOCKET NOS. 50-325 AND 50-324 LICENSE NOS. DPR-71 AND DPR-62 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION ON CONTAINMENT PURGING
Dear Mr. Ippolito:
During an April 29, 1980 telephone conference call among representatives of Carolina Power & Light Company (CP&L), NRR, and EG&G, Idaho (an NRC consultant),
NRC asked additional questions concerning containment purging on the Brunswick Steam Electric Plant (BSEP) Unit Nos. 1 and 2.
CP&L's responses were provided to NRC in a May 2, 1980 telephone call. This letter is to document the information provided ver-bally on May 2.
Question 1:
Do the purge valves close when both radiation monitors fail?
CP&L Response: No, they do not.
However, a downscale failure will previde an alarm. This is consistent with other Engineered Safety Feeure systems.
Question 2:
CP&L's April 1, 1980 letter states that a modification to the override defeat is to be installed. How will this work and what is the installation schedule?
CP&L Response: Paragraph 5.b (page 3) of our April 1,1980 letter describes how this system will function. As discussed in the May 2 telephone conversation, our current schedule comitment (revised from our December 7, 1979 letter) calls for the Unit 1 installation to be complete by the end of its 1980 refueling outage and for Unit 2 to be installed during the first outage of sufficient length after the refueling outages, but no later than the end of 1980.
Question 3:
Can the actuation logic be reset if the initiating condition still exists?
CP&L Response: No, there is no manual reset capability. The logic will automatically clear when the initiating condition goes away, out the valves do not automatically open when the logic clears.
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Question 4:
Are the reset switches covered or otherwise protected to facilitate administrative control?
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CP&L Response: As discussed above, there are no reset switches. The override switches will be keylock switches and will function as described in paragraph 5.c of our April 1, 1980 letter.
Question 5:
What are your plans for system condition annunciation when a, bypass is activated?
CP&L Response: As indicated in paragraph 5.d of our April 1, 1980 letter, the use of a bypass will be indicated by lights on the control board.
Question 6:
CP&L's January 19, 1979 letter indicated that other overrides exist on safety actuation signals. Provide details on these other overrides.
CP&L Response: Overrides exist on the RHR and Core Spray pumps. Once activated, the logic is sealed in until reset by the operator. However, individual pumps can be stopped by the operator.
Status lights indicate when ;smps have been stopped under these circumstances.
I trust that this information is suitable for your use.
If you have any further questions, please contact my staff.
Yours very truly,
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E. E. Utley N'
Executive Vice President Power Supply and Engineering & Construction CSB/tl