ML19208A950
| ML19208A950 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 09/14/1979 |
| From: | Utley E CAROLINA POWER & LIGHT CO. |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7909180339 | |
| Download: ML19208A950 (2) | |
Text
A September 14, 1979 FILE: NG-3514(B)
SERIAL: GD-79-2336 Office of Nuclear Reactor Regulation Attention:
Mr. T. A. Iprolito, Chief Operating Reactors Branch No. 3 United States Nuclear Regulatory Commission Washington, D.C.
20555 BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1 AND 2 LICENSE NOS. DPR-71 AND DPR-62 DOCKET NOS. 50-325 AND 50-324 INFORMATION ON TARGET ROCK SAFETY / RELIEF VALVES
Dear Mr. Ippolito:
In response to Mr. Brian Grimes' latter of July 16, 1979, requesting information on Target Rock safety / relief valves at 1.he Brunswick Steam Electric Plant Unit Nos. 1 and 2, Carolina Power & Light Company submits the following information:
1.
What is the status of each of the Target Rock safety / relief valves at your plant (s)?
a.
Are they in their original design configuration?
CP&L Response: Yea b.
What is the existing simmer margin?
CP&L Response:
100, 110, and 120 psig (setpoints at 1105, 1115 and 1125 psig; normal operating pressure is 1005 psig).
What modifications have you implemented to improve reliability?
c.
CP&L Response:
Increase setpoint (si=mer margin) by 25 psig.
J.
On what date vera these scdifications made?
CP&L Response: Unit No. 2 - June 1978; Unit No. 1 - 360036 September 1978.
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O Mr. T. A. Ippolito 2.
What main'cenance and testing do you routinely perform on these valves and how often is it performed?
CP&L Response:
(1) PT 19.4 verifies setpoint, inspect and rebuild pilot assembly; 18 months.
(2) PT 11.1.2 verifies operability of ADS valves; 18 months.
3.
What additional modifications and/or maintenance do you plan to implement in the future?
CP&L Response: None at present. We are observing and evaluating performance of the new two-stage topworks being tried at several other BWR's.
4.
On what date will the modification (s) and/or maintenance in Item 3 be implemented?
CP&L Response: Not applicable.
We trust that this information
.isfies the request for Target Rock safety / relief valve information.
Yours very truly, o'
/
o E. E. Utley i
Executive Vice President'.
Power Supply & Customer Services EEU/jcb I (5()(kbbh'