ML17194A982

Model Tech Specs Re Containment Purge Isolation Valve Operability

ML17194A982
Person / Time
Site:	Cook
Issue date:	10/30/1981
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML17194A983	List: ML17194A982 ML17319B089 ML17319B090 ML17319B091 ML20132C554
References
NUDOCS 8112020009
Download: ML17194A982 (3)

Text

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CONTAINMENT SYSTEMS *.

LIMITINS CONDITION FOR OPERATION

• 3.6.1.7 The containment purge suppiy.and exhau*st iso1at1on valves may be open for safety-related reasons [or shall be locked.closed]. The

• containment vent line isolation valves may be. open for safet,Y-related reasons [or ~hall *be lt:>cked closed).

APPLlCABILITY:

MODES 1, 2, 3, an~ 4.

ACTION":.

{Fo_r pl ants with valves close~ by technicaf specification)*

With one containment purge supply and/or one exhaust isolation valve open, close the open valve(s) within *one hour or be in at least HOT STAIJOBY.within* the next -~ hours and in COLO SHUTpOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

(For p~ ants with valves that may be ~pen~d by tech.nical specifications)

1. With one containment purge supply and/or o.ne exhaust iso1a~ibi1br vent valve inoperable, close the associated OPERABLE valve and either restore the inoper_able valve to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or lock the.*.

OPERABLE valve closed.

2.

Operation* Qc.)' then continue unti 1 performance* of the next re qui red

• valve test provided that the OPERABLE valve is verified to be, locked closed at least once per 31 days.

3.

Otherwise, be in at least HOT STAtWBY w1thin the next six hours 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 />.

4.

The provisions of Sp~cifitation 3.0~4 are not applicable; SURVEILLANCE REQUIREMENTS 4 *. 6.1. 7. l The

-inch co.ntainment purge *supply* and exhaust isolation ya~ves and the

-incn-vent line isolation valves shall be*detennined locked closed

• at 1 eastonce per 31 days *.

4.6.1.7.2 *The *valve seals of the purge supply and exhaust is.olation va1ves

• and the vent-line isolation valves shall be replaced at least one per _years.

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CONTAINMENT SYSTEMS 3/4 4.6.3 CONTAINMENT ISOLATION VALVES LIMITING CONDITION FOR OPERATlON 3.6.3 The containment isolation valves specified in Table 3.6-1 shall be OPERABLE with isolation times as shown in Table 3.6-l.

APPLICABILITY:

MODES l, 2, 3 and 4.

ACTION:

With one or more of the isolation valves(s) specified in Table 3.6-1 inoperable, maintain at least one isolation valve OPERABLE in each affected penetration that is open and either:

a. Restore the inoperable valve(s) to OPERABLE status within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or

b.

Isolate each affected penetration within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> by use of at least one deactivated automatic valve secur:ed in the isolation position, or

c. Isolate each affected penetration within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> by use of at least one closed manual valve or blind flange; or

d.

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 />.

SURVEILLANCE REQUIREMENTS 4.6.3.1 The isolation valves specified in Table 3.6-1 shall be demonstated OPERABLE prior.to returning the valve to service after-maintenanc_e, repair or replacement work is performed on the valve or its associated actuator, control or power circuit by perfonnance of a cycling test, and veri.fication of isola-tion time.

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CONTAINMENT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 4.6.3.2.Each isolation valve specified in Table 3.6-1 shall be demonstrated

• OPERABLE during-the-COLD SHUTDOWN or REFUELING MODE at least once per 18 months by:

a. Verifying that on a Phase A containment isolation test signal, each Phase A isolation valve actuates to its isolation position.

b. Verifying that on a Phase B containment isolation test signal, each Phase B isolation valve actuates to its isolation position.

4.6.3.3 The isolation time of each power operated or automatic valve of Table 3.6-1 shall be determined to be within its limit when tested pursuant to Specification 4.0.5.

4.6.3.4 The containment purge and vent isolation valves shall be demonstated OPERABLE at intervals not to exceed

• months.

Valve OPERABILITY shall be determined by verifying that when the measuued leakage rate is added to the leakage rates determined pursuant to Specification 4.6.1.2.d for all other Type Band C penetration, the combined leakage.rate is less than or equal to 0.60La..

• However, the leakage rate for the containment purge and vent isolation valves shall be compared to the previously*measured leakage rate to detect excessive valve degradation.

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