ML13331A941
| ML13331A941 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/27/1987 |
| From: | Southern California Edison Co |
| To: | |
| Shared Package | |
| ML13331A939 | List: |
| References | |
| NUDOCS 8707240125 | |
| Download: ML13331A941 (3) | |
Text
Attachment 1 3.i.5 PRESSURIZER RELIEF VALVES APPLICABILITY: MODES 1, 2 and 3.
64 12/16/81 OBJECTIVE:
To ensure reliability of the power operated relief valves (PORVs) and their associated block valves.
SPECIFICATION:
Two PORVs and their associated block valves shall be OPERABLE.
ACTION:
A. With one or more PORV(s) inoperable, within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> either restore the PORV(s) to OPERABLE status or close the associated block valve(s) and maintain the block valve(s) in the closed position; otherwise, be in at least HOT 65 STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN 12/17/81 within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
B. With one or more block valve(s) inoperable, within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> restore the block valve(s) to OPERABLE status; otherwise, be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
83 C. The provisions of Specification 3.0.4 are not applicable.
11/2/84 BASIS:
The power operated relief valves (PORVs) operate to relieve RCS pressure below the setting of the pressurizer code safety valves. These relief valves have remotely operated block valves to provide a positive shutoff capability should a relief valve become inoperable. The air supply for both the relief valves and the block valves is capable of being supplied from a backup passive nitrogen source to ensure the ability to seal this possible RCS leakage path.
64 12/16/81
References:
(1) NRC letter dated July 2, 1980, from D. G. Eisenhut to all pressurized water reactor licensees.
This page included FOR REFERENCE ONLY 8707240125 870527 PDR ADOCK 05000206 P
PDR 3-23 Revised:
11/16/84
4.1.6 PRESSURIZER RELIEF VALVES APPLICABILITY:
Applies to the power operated relief valves (PORVs) and their associated block valves for MODES 1, 2 and 3.
OBJECTIVE:
To ensure the reliability of the PORVs and block valves.
SPECIFICATION:
A. Each PORV shall be demonstrated OPERABLE:
- 1.
At least once per 31 days by performance of a CHANNEL TEST, which may include valve operation, and
- 2.
At least once per 18 months by performance of a CRANNEL CALIBRATION.
B. Each block valve shall be demonstrated OPERABLE at least 64 once per 92 days by operating the valve through one 12/16/81 complete cycle of full travel.
C. The backup nitrogen supply for the PORVs and block valves shall be demonstrated OPERABLE at least once per 18 months by transferring motive power from the normal air supply to the nitrogen supply and operating the valves through a complete cycle of full travel.
BASIS:
The power operated relief valves (PORVs) operate to relieve RCS pressure below the setting of the pressurizer code safety valves.
These relief valves have remotely operated block valves to provide a positive shutoff capability should a relief valve become inoperable.
The air supply for both the relief valves and the block valves is capable of being supplied from a backup passive nitrogen source to ensure the ability to seal this possible RCS leakage path.
References:
(1) NRC letter dated July 2, 1980, from D. G. Eisenhut to all pressurized water reactor licensees.
Typo Revised:
1/13/82 4-26 Revised:
12/16/81 4.1.6 PRESSURIZER RELIEF VALVES APPLICABILITY:
Applies to the power operated relief valves (PORVs) and their associated block valves for MODES 1, 2 and 3.
OBJECTIVE:
To ensure the reliability of the PORVs and block valves.
SPECIFICATION:
A.
Each PORV shall be demonstrated OPERABLE:
- 1.
At least once per 31 days by performance of a CHANNEL TEST, which may include valve operation, and
- 2.
At least once per 18 months by performance of a CHANNEL CALIBRATION.
B.
Each block valve shall be demonstrated OPERABLE at least once per 92 days by operating the valve through one complete cycle of full travel, unless the block valve is being maintained closed in order to meet the requirements of Specification 3.1.5.A.
C.
The backup nitrogen supply for the PORVs and block valves shall be demonstrated OPERABLE at least once per 18 months by transferring motive power from the normal air supply to the nitrogen supply and operating the valves through a complete cycle of full travel.
BASIS:
The power operated relief valves (PORVs) operate to relieve RCS pressure below the setting of the pressurizer code safety valves. These relief valves have remotely operated block valves to provide a positive shutoff capability should a relief valve become inoperable. The air supply for both the relief valves and the block valves is capable of being supplied from a backup passive nitrogen source to ensure the ability to seal this possible RCS leakage path.
References:
(1) NRC letter dated July 2, 1980, from D. G. Eisenhut to all pressurized water reactor licensees.