ML20133F434

Proposed Change 114,Suppl 1,revising Tech Spec Pages 3.11-2 & 3.11-5 Re Containment Isolation Valves Under Administrative Controls

ML20133F434
Person / Time
Site:	Maine Yankee
Issue date:	10/07/1985
From:	Maine Yankee
To:
Shared Package
ML20133F433	List: ML20133F430 ML20133F434
References
6173L-SDE, NUDOCS 8510110035
Download: ML20133F434 (2)

Text

MAINE YANKEE ATOMIC POWER COMPAfsY Exception:

1. Manual containment isolation valves may be repositioned under administrative controls provided prior compensatory measures are taken to isolate the penetration. Compensatory measures which may be taken include closing other valves or installing blind flanges to isolate a penetration. Compensatory measures which are in effect for longer than seventy-two hours must meet- the same. design criteria as the original containment isolation valve.

2. The following manual containment isolation valves may be repositioned under. administrative control without compensatory measures to isolate the penetration:

RH-4, 6, 7, 26 MS-48, 50, 68, 70, 88, 90, 239, 241, 243 PAP 1, 4, 23, 24, 25 ]

W D-4, 5, 9, 10, 14, 15 IA-212, 213, 218, 219, 220 ]

3. Blowdown and body vent valves associated with instrumentation lines ))

may be repositioned under administrative control without compensatory ))

measures to isolate the penetration. ))

Remedial Action:

With one or more automatic, remotely operated, or manual containment ))

isolation valves inoperable, maintain at least one automatic, remotely ))

operated, or manual isolation valve operable in each affected penetration ))

that is open, and within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> either: ))

1. Restore the inoperable valve to operable status, or

2. ~ Isolate the affected penetration by use of at least one manual, remotely operated or deactivated automatic isolation valve secured (tagged) in the closed position or by use of a blind flange.

Compensatory measures which are in effect for longer than seventy-two hours must meet the same design criteria as the original containment integrity valve.

C. The reactor shall not be critical if the containment internal pressure exceeds 3 psig.-

D. On-line containment purge.

.On-line purging of containment is not allowed under the conditions of Specification 3.ll.B above, unless the following conditions are satisfied:

1. Prior to the depressurization of the containment for on-line purge, the two purge supply, two exhaust valves and one exhaust bypass valve will be cycled to test the automatic closure feature using both the Containment Gaseous Activity and Primary Vent Stack Gaseous Activity closure signals. The operation of the inner and outer supply and exhaust 8510110035 851007 gDR ADOCK O 39 3.11-2 10/07/85 6173L-SDE

M AINE Y ANKEE ATOMIC POWER COMPANY s e

• Basis (continued)

Manual containment integrity valves may be repositioned provided that actions ,

are taken to isolate the penetration by alternate means. As soon as 4 practicable, but within seventy-two hours, the alternate means utilized, including associated piping, will be verified to meet the same design criteria as the original isolation.

Certain valves are allowed to be repositioned under administrative controls (e.g., written procedures) to effect required periodic tests and to allow certain required evolutions during startup and shutdown, including main steam line warmup, steam trap blowdown, and Residual Heat Removal (RHR) system operation. Examples of uses of these valves are provided below. These examples are not all inclusive.

The calorimeter isolation valves, MS-239, 241 and 243 are opened in order to perform planned calorimetrics.

The steam line vents, MS-48, 68 and 88, are open for several hours during heatup between reactor coolant temperatures of approximately 2100F and 300oF.

f The steam trap drains, HPD-S, 10 and 15, are cycled open briefly during steam l line warmup to blow down the steam trap.

The isolation valves to the blowdown tank, HPD-4, 9, and 14, are open during heatup and are closed prior to entering power operation.

The steam genetator non-return valve bypasses, MS-50, 70, and 90, are opened during steam line warmup.

The Residual Heat Removal System valves, RH-4, 6, 7 and 26, are utilized when the Residual Heat Removal System is in service or when low temperature over pressure protection is in service.

PAP 1 and 4 are opened monthly to perform periodic surveillance of the hydrogen purge system in accordance with Technical Specifications (TS 4.11).

The inner door 0-ring test valves, IA-218, 219 and 220, are opened to allow testing of the inner containment door 0-ring.

During the time that the steam line or steam trap isolation valves are open, the reactor is either subcritical or at low power conditions. A membrane barrier separates the main steam system from the containment atmosphere and the reactor coolant system at all times.

The RHR system containment isolation valves are opened only with the primary coolant temperature (TS 3.4) equal to or less than minimum pressurization temperature. There is a membrane barrier between the containment atmosphere and the RHR system.

Blowdown and body vent valves on instrumentation lines are allowed to be ))

repositioned under administrative controls (e.g., written procedures) to effect ))

required calibration and maintenance. These administrative controls ensure ))

containment boundary conditions are maintained following calibration and ))

maintenance. ))

3.11-5 10/07/85 6173L-SDE

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