B12560, Proposed Tech Specs,Adding New Section Re Main Feedwater Isolation Valves

Proposed Tech Specs,Adding New Section Re Main Feedwater Isolation Valves

ML20236H605
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	07/29/1987
From:	CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20236H599	List: B12560, Proposed Tech Specs,Adding New Section Re Main Feedwater Isolation Valves ML20236H597
References
B12560, NUDOCS 8708050261
Download: ML20236H605 (4)

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Docket No. 50-213 B12560 I

Attachment I Haddam Neck Plant Proposed Revision to Technical Specifications i

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I 8708050261 870729 July 1987 PDR ADDCK 05000213-l- P PDR 1

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3.25 FEEDWATER ISOLATION VALVES LIMITING CONDITION FOR OPERATION 3.25 The feedwater isolation valves specified in Table 3.25-1 shall be OPERABLE with isolation times as shown in Table 3.25-1.

APPLICABILITY: MODES 1, 2,3 and 4 ACTION:

With one or more feedwater isolation valve (s) specified in Table 3.25-1 inoperable:

a. Restore the inoperable valve (s) 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

b. De 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

1. The isolation valves specified in Table 3.25-1 shall be demonstrated OPERABLE prior to returning the valve to service af ter maintenance, repair or replacement work is performed on the valve or its associated actuator, control or power circuit by performance of a cycling test, and verification of isolation time, as required.  ;

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2. Each feedwater isolation valve specified in Table 3.25-1 shall be demonstrated j OPERABLE during the COLD SHUTDOWN or REFUELING MODE at least once '

per 18 months by verifying that on a Safety Injection Actuation test signal, each feedwater isolation valve actuates to its isolation position.

3. The isolation time of each valve of Table 3.25-1 shall be determined to be within its limit when in-service tested in accordance with Section XI of the ASME Boiler and Pressure Vessel Code and applicable Addenda as required by 10CFR50, Section 50.55a(g), except where specific written relief has been granted by the Commission pursuant to 10CFR50, Section 50.55a(g)(6)(i).

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TABLE 3.25-1 FEEDWATER ISOLATION VALVES MAXIMUM ISOLATION VALVE FUNCTION TIME FW-M OV-11 Feedwater Isol. Valve 70 F W-M OV-12 Feedwater Isol. Valve 70 F W-M OV-13 Feedwater Isol. Valve 70 F W-M OV-14 Feedwater Isol. Valve 70  ;

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BASES 3.25 FEEDWATER ISOLATION VALVES

' The accident analysis for a main steam line break assumes that the main feedwater isolation valves will close on a - ntainment isolation actuation signal (CIAS). Also, the closure of these valves based on a CIAS is credited in determining the Pressure / Temperature limits for the purpose of environmental gr.!ification. The feedwater isolation valves act as a backup to the feedwater regulation valves in the event a feedwater regulation valve fails open during a Main Steam Line Break.

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