ML20006A446

Proposed Tech Specs Re Limiting Conditions for Operation & Surveillance Requirements for Pressure Suppression Chamber - Reactor Bldg Vacuum Breakers

ML20006A446
Person / Time
Site:	Vermont Yankee
Issue date:	01/16/1990
From:	VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML20006A445	List: ML20006A444 ML20006A446
References
NUDOCS 9001260274
Download: ML20006A446 (1)

Text

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VTNPS

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S 3.7 LIMITING CONDITIONS'FOR OPERATION 4.'7 SURVEILLANCE REQtTIREMENTS ,-

3. Whenever primary containment is required, the total 3. Prior to violating the integrity of a system primary containment leakage rate shall not exceed outside the primary containment, which is 0.8 weight percent per day (La ) at a pressure of connected to any valve listed in Table 4.7.2b, the 44 psig (P a). isolation valves bounding the opening shall have Type C tests performed. If the opening cannot be 4 Whenever primary containment is required, the isolated from the containment by two isolation leakage from any one isolation valve shall not

~ valves which meet the acceptance criteria of exceed 5 percent of the maximum allowable leak rate Appendix J (10CFR Part 50), a blank flange shall (La) at peak accident pressure (P a) and the be installed on the opening.

leakage from any one main steam line isolation valve shall not exceed 15.5 scf/hr at 44 psig (P a). 4. The leakage from any one isolation valve shall not exceed 57. of Ltm. The leakage from any one main

5. Pressure Suppression Chamber - Reacter steam line isolation valve shall not exceed Euilding Vacuum Breakers 11.5 scf/hr at 24 psig (Pt). Repair and retest shall be conducted to insure compliance.

a. Two of two pressure suppression chamber-reactor building vacuum breaker systems shall be 5. Pressure Suppression Ch d er -

operable at all times when the primary Reactor Ecildine Vacuum Ernakers

_ny containment integrity is required. The setpoint t7o of the differential pressure instrumentation a. The pressure suppression chamber-reactor 9 which actuates the pressure suppression building vacuum breaker systems and y chamber-reactor building air-operated vacuum associated instrumentation including setpoint (O breakers shall be 10.5 psid. The self actuating shall be checked for proper operation every 69 vacuum breakers shall open fully when subjected three months.

O to a force equivalent to or less than 0.5 psid g acting on the valve disk. b. During each refueling outage, each vacuum 6o breaker shall be tested to determine that the ng b. With one Reactor Building - suppression chamber force required to open the vacuum breaker pp vacuum breaker inoperable for opening but known does not exceed the force specified in

- to be closed, restore the inoperable vacuum Specification 3.7.A.5.a and each vacuum breaker to OPr".RABLE status within seven (7) days breaker shall be inspected and verified to or then be in cold shutdown within the following meet design requirements.

24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

c. With one Reactor Building - suppression chamber vacuum breaker failed open - power operation may continue provided the other vacuum breaker in that line is verified to be closed and conditions required by 3.7.D.2 are met.

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