ML17277B176

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Proof & Review Copy of Current & Proposed Tech Specs Re Limiting Condition for Operation of Drywell & Suppression Charge Purge Sys
ML17277B176
Person / Time
Site: Columbia Energy Northwest icon.png
Issue date: 12/08/1983
From:
WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:
Shared Package
ML17277B175 List:
References
NUDOCS 8312190075
Download: ML17277B176 (6)
v • d • e


Text

ATTACHMENT A Car CONTAINMENT SYSTEMS vt(L'fJF g pp/l$ [y opp>(

DRYWELL At<0 SUPPRESSION CHAMBER PURGE SYSTEM LIMITING CONDITION FOR OPERATION 3.6. 1.8 The drywell .and suppression chamber 2-inch purge supply and exhaust isolation valves shall be OPERABLE and:

a. Each 24- and 30-inch purge supply and exhaust isolation valve shall be sealed closed.
b. Each 2-inch purge valve may be open for purge system operation for inerting, deinerting and pressure control.

APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3.

ACTION:

With a 24- and/or 30"inch drywell and suppression chamber purge supply and/or exhaust isolation valve(s) open or not sealed closed, close and/or seal the 24- and 30-inch valve(s) or otherwise isolate the penetration within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLO SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

b. With a 2"inch drywell and suppression chamber purge supply and/or exhaust isolation valve(s) inoperable or open for other than inerting, deinerting, or pressure control, close the open 2-inch valve(s) or otherwise isolate the penetration(s) within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLO SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

C. With a drywell and suppression chamber purge supply and/or exhaust isolation valve(s) with resilient material seals having a measured leakage rate exceeding the limit of Surveillance Requirements 4.6.1.8.3 and/or 4.6. 1.8.4, restore the inoperable valve(s) to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLO SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

SURVEILLANCE RE UIREMENTS 4.6.1.8.1 Each 24- and 30-inch drywell and suppression chamber purge supply and exhaust isolation valve shall be verified to be sealed closed at least once per 31 days.

4.6.1.8.2 At least once per 6 months on a STAGGERED TEST BASIS each sealed closed 24- and 30-inch drywell and suppression chamber purge supply and exhaust isolation valve with resilient material seals shall be demonstrated OPERABLE by verifying that the measured leakage rate is less than or equal to 0.05 L when pressurized to P .

83i2i90075 83i208 PDR ADOCN 05000397 PDR WASHINGTON NUCLEAR UNIT 2 3/4 6-11

i CONTAINMENT SYSTEMS SURVEILLANCE REQUIREMENTS Continued) 4.6. 1.8.3 At least once per 92 days each 2-inch drywell and suppression chamber purge supply and exhaust isolation valve with resilient material seals shall be demonstrated OPERABLE by verifying that the measured leakage rate is less than or equal to 0.01 La when pressurized to P .

WASHINGTON NUCLEAR - UNIT 2 3/4 6"12

ATTACHMENT B "DRAFT LCO" CONTAINMENT SYSTEMS DRYWELL AND SUPPRESSION CHAMBER PURGE SYSTEM LIMITING CONDITION FOR OPERATION 3.6. 1.8 The drywell and suppression chamber 2-inch exhaust isolation valves shall be OPERABLE and:

a ~ Each 24- and 30-inch purge supply and exhaust isolation valve shall be closed during the time period:

1. Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after THERMAL POWER is greater than 15Ã of RATED THERMAL POWER, following startup, to
2. Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to reducing THERMAL POWER to less than 15Ã of RATED THERMAL POWER, preliminary to a scheduled reactor shutdown.
b. Each 2-inch purge valve may be open for purge system operation for inerting, deinerting and pressure control.

C. Each 24- and 30-inch purge supply and exhaust isolation valve shall be limited to open no more than 70 degrees.

APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3.

ACTION:

a ~ With a 24- and/or 30-inch drywell and suppression chamber purge supply and/or exhaust islation valve(s) not closed, close and/or seal the 24- and 30-inch valve(s) or otherwise isolate the pene-tration within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> except as provided for in 3.6.1.8.a.

,b. With a 2-inch drywell and suppression chamber exhaust isolation valve inoperable or open for other than inerting, deinerting, or pressure control, close the open 2-inch valve(s) or otherwise isolate the penetration(s) within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

C. With a drywell and suppression chamber purge supply and/or exhaust isolation valve(s} with resilient material seals having a measured leakage rate exceeding the limit of Surveillance Requirements 4.5;- 1.8.2, restore the inoperable valve(s) to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, and in COLD SHUTDOWN within'he following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

WASHINGTON NUCLEAR - UNIT 2 3/4 6-.11

CONTAINMENT SYSTEMS SURVEILLANCE RE UIREMENTS 4.6. 1.8. 1 Each 24- and 30-inch drywell and suppresion chamber purge supply and exhaust isolation valve shall be verified to be closed at least once per 31 days.**

4.6. 1.8.2 At least once per 92 days each group shown below of drywell and suppression chamber purge supply and exhaust isolation valve with resilient material seals shall be demonstrated OPERABLE by verifying that the measured leakage rate is less than or equal to .05 L when pressurized to P .

Valve Grou Maximum Leaka e Rate

a. CEP-V-1A and 1B .05 L,*

CEP-V-2A and 2B

b. CEP-V-3A and 3B .05 L*a CEP-V-4A and 4B
c. CSP-V-1 .05 L
  • CSP-V-2
d. CSP-V-3 CSP-V-4 4.6.1.8.3 Each 24- and 30-inch purge supply and exhaust isolation valve 70 degree open limiting device shall be functionally tested at least once every 18 months.
  • These valves are tested in parallel with the maximum leakage allowed for a single valve applied to the group.
    • Valve operation as provided for in 3.6.1.8.a shall be under administrative control only.

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