ML19320A936

to Inservice Insp Program

ML19320A936
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	07/01/1980
From:	VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML19320A930	List: ML19320A929 ML19320A936
References
WVY-80-92, NUDOCS 8007080296
Download: ML19320A936 (3)

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Revision 4 Changes Section Pages Valves Remove Page V-36, Rev. 2 Insert Page V-36, Rev. 4 e

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8007080296

a INSERVICE INSPECTION PROGRAM Record of Changes INITIALS INITIALS Change Date Change Date Number Entered PORC P1 Supt 110 0 Number Entered PORC P1 Supt MOO 1 6/25/7d cinn[y E' " %hn 2 LO/18/79

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f Relief Request Basis NUMBER: V9 SYSTEM: Nuclear Boiler VALVE: RV2-71A/D CATEGORY: B CLASS: 1 FUNCTION: Automatic depressurization TEST REQUIREMENT: Q BASIS FOR RELIEF: Valves cannot be exercised during power operation since failure in the open position would require tripping the reactor. Also, live steam would be discharged to the suppression pool which would heat the water and pres-surize the containment. This causes undue structural stresses in the containment. Valves cannot be exercised during cold shutdowns since steam is required to stroke the main piston in the valve. Experience in safety and relief valve opera-tion shows that testing 50% of the valves per refueling outage is adequate to detect failures or deterioration. l ALTERNATE TESTING: During each operation cycle, each relief valve will be manually opened to full stroke with the reactor at low pressure until the thermocouple downstream of the valve indicates i

l fluid is flowing from the valve.

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-V - 36 Rev. 4 i - . .