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

{{Adams
| number = ML20236H605
| issue date = 07/29/1987
| title = Proposed Tech Specs,Adding New Section Re Main Feedwater Isolation Valves
| author name = 
| author affiliation = CONNECTICUT YANKEE ATOMIC POWER CO.
| addressee name = 
| addressee affiliation = 
| docket = 05000213
| license number = 
| contact person = 
| document report number = B12560, NUDOCS 8708050261
| package number = ML20236H599
| document type = TECHNICAL SPECIFICATIONS, TECHNICAL SPECIFICATIONS &amp; TEST REPORTS
| page count = 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 hours; or
: b.      De in at least HOT STANDBY within the next 6 hours and in COLD SHUTDOWN within the following 30 hours.
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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