ML13326A644
| ML13326A644 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/20/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML13326A640 | List: |
| References | |
| TAC-43464, NUDOCS 8105010571 | |
| Download: ML13326A644 (4) | |
Text
ttachment 3 ORDER FOR MODIFICATION OF LICENSE (EVENT V)
SAN ONOFRE UNIT 1 DOCKET NO. 50-206 Insert the enclosed pages in the Appendix A Technical Specifications.
Pages 25a 25b 46c
25a 3.3.4 Primary Coolant System Pressure Isolation Valves (Limiting Condition for Operation)
Applicability:
Operational Modes 1, 2,.3 (Power Operation, Startup, and Hot Shutdown) applies to the operational status of the primary coolant system pressure isolation valves.
Objective:
To increase the reliability of primary coolant system pressure isolation valves thereby reducing the potential of an inter system loss of coolant accident.
Specification:
1.
The integrity of all pressure isolation valves listed in Table 3.3.4-1 shall be demonstrated by specification>4.2.2.
Valve.
leakage shall not exceed the amounts indicated in Table 3.3.4-1.
- 2. If Specification 1 cannot be met, an orderly shutdown shall be initiated and the reactor.shall be in the cold shutdown condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
NRC Order dated April 20, 1981
-25b TABLE 3.3.4-1 PRIMARY COOLANT SYSTEM PRESSURE.ISOLATION VALVES Maximum (a)
System Valve No.
Allowable Leakage Safety Injection Loop A, cold leg 867a a 5.0 GPM Loop B, cold leg 867b 5 5.0 GPM Loop C, cold leg 867c
. 5.0 GPM Footnote:
1P'l.
Leakage rates less than or equal to 1.0 gpm are considered acceDtable.
- 2. Leakage rates greater than 1.0 gpm but less than or equal to 5.0 gpm are considered acceptable if the latestimeasured rate has not exceeded the rate determined by the previous test by an amount that reduces the margin between measured leakage rate and the maximum permissible rate of 5.0 gpm by 50' or greater.
- 3.
Leakage rates greater than 1.0. gpm but less than or equal to 5.0 C p7 are considered unacceptable if the latest measured rate exceeded the rate determined by the previous test by an amount that reduces the margin between measured leakage rate and the maximum permissible rate of 5.0 gpm by 50% or greater.
- 4. Leakage rates greater than 5.0 gpm are considered unacceptable.
NRC Order dated April 20, 1981
- 46c 4.2.2 Primary Coolant System Pressure Isolation Valves (Surveillance Requirement)
Applicability Operational Modes 1, 2, 3 (Power Operation,. Startup, and Hot Shutdown) applies to the operational status of the primary coolant, system pressure isolation valves.
Objective:
To increase the reli.obility of primary coolant system pressure isolation valves thereby reducing the potential of an inter system loss of coolant accident.
Specification:
1.
Periodic leakage testing (a) on each valve listed in Table 3.3.4-1 shall be accomplished every time the plant is placed in the cold shutdown condition for refueling, each time the plant is placed in a cold shutdown condition for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> if testing has not been accomplished in the pre ceeding 9 months, and prior to returning the valve to service after maintenance, repair or replacement work is performed.
a)To satisfy ALARA requirements, leakage may be measured indirectly (as from the performance of pressure indicators) if accomplished in accordance with approved procedures and supportedby computa tions showing that the method is capable of demonstratino valve compliance with the leakage criteria..
The minimum test differential pressure shall not be less than 150 pid.
R Order dated: April 20, 1981