ML20092A056

Proposed Tech Specs Re Removal of Autoclosure Interlock from Sdcs Suction Valves

ML20092A056
Person / Time
Site:	Millstone
Issue date:	01/30/1992
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20092A051	List: B14005, SDC Auto-Closure Interlock Removal at Millstone Unit 2 ML20092A049 ML20092A056
References
B14005, NUDOCS 9202060499
Download: ML20092A056 (2)

Text

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4 Docket No. 50-336 EliOM h

Attachment 1 Millstone Nuclear Power Station, Unit No. 2 Proposed Revision to Technical Specifications Shutdown Cooling Systi.a Autoclosure Interlock 4

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January 1992 JgRo2060499 920130 p ADOCK 05000336 PDR l

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EMERGENCY CORE COOLING SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 10.~ Verifying that_the following valves are in the indicated .

position with power to the valve operator removed:

l Valve Number. Valve Function Valve Position ,

2-SI-306 Shutdown Cooling Open Flow Control 2-SI-659 SRAS Rec.irc. Open* 1 2-SI-660- 3 RAS Recirc. Open* ,

2-CH-434 Thermal Bypass Closed **

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b. By a visual inspection which verifies that no loose debris-(rags, trash, clothing, etc.)'is~present in the containment which could be-transported to the containment sump and cause restriction-of-the pump suctions _during LOCA conditions. This visual inspection shall-be performed:

1. For-all accessible areas of the containment prior to establishing .'

CONTAINMENT INTEGRITY, and

2. 0f the areas affected within containment at-the completion of.

containment entry when CONTAINMENT INTEGRITY is established.

c. At least'once pe* 18 months by:

1. Verifying automatic interlock action of the shutdown cooling-system from the reactor coolant system by er.suring that with a simulated reactor _ coolant system pressure signal greater than or- equal to 300 psia the interlock prevents the shutdown  ;

cooling systcm suction valvestfrom being opened. 1

-2.- A visual.--inspectior, of the containment sump and-verifying that the subsystem suction inlets;are not restricted by debris and S that the sump components (trash racks, screens,-etc.) show no evidenceL of structural- distress or corrosion.-

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3. -Verifying that- a: minimum total of.110 cubic feet of trisodium phosphate dodecahyditte (TSP) is contained within the TSP storage baskets.

p 4. Verifying that when a representative sample of 0.35 i 0.65:lbs of TSP from a TSP storage basket is submerged, without~

agitation, in 50 5 gallons of 180 i 10*F borated water from

.the RWST, the pH of the' mixed solution is raised to'1 6 within'

~4 hours.

• To be closed prior to recirculation following LOCA.

• • 2-CH 434, a manual valve, shall be locked closed a MILLSTONE - UNIT 2 3/4 5-5 AmendmentNo;7,#,M,/d/

0049.

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