ML19327A641

Forwards Safety Evaluation Accepting Proposed Tech Spec Changes Re Purge/Vent Operation.Licensee Should Verify That Positive Stop Installed on Valve to Prevent Opening Beyond Tech Spec Angle

ML19327A641
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	05/10/1989
From:	Wermiel J Office of Nuclear Reactor Regulation
To:	Muller D Office of Nuclear Reactor Regulation
Shared Package
ML19327A642	List: ML19327A641 ML19327A643 ML19327A644 ML19327A647 ML19327A651 ML19327A652 ML19327A656 ML19327A657 ML19327A658 ML19327A660 ML19327A661 ML19327A662 ML19327A663 ML19327A664 ML19327A665 ML19327A666 ML19327A667 ML19327A668 ML19327A669 ML19327A670 ML19327A671 ML19327A672 ML19327A673 ML19327A693 ML19327B570 ML19327B588 ML19327B595 ML19327B596 ML19327B598 ML19327B599
References
TAC-73427, NUDOCS 8905180081
Download: ML19327A641 (2)

Text

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• I UN!TED STATES

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q FUCLEAR REGULATORY COMMIS5lON s

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May 10,1939 Docket Nos. 50 295 and 50 304 MEMORANDUM FOR: Daniel Muller. Director Project Directorate !!!-2 Division of Reactor Projects !!!, !Y, V and Special Projects FRON:

Jared 5. Wermiel, Acting thief Phnt Systems tranch i

Division of Engineering and Systems Technology

$U8 JECT:

PROPOSED TS CHANGES ON PURGE / VENT OPERATION

Reference:

Zion Nuclear Power Station, Units 1 and 2 Proposed Amendment l

to facility Operating License No. DPR-19 and DPR-48, letter to H. R. Denton (NRC) From P. C. Leonard dated February 2,1986 Plant Name:

Zion Nttlear Power Station, Units 1 and 2 Licensee:

Cossenwdsfth Edison Company i

Review Status:

Complete The Plant Systems Branch has reviewed Commonwealth Edison's proposed char.ges to l

the Technical Specifications on containment purge and vent valve operation for l

Zion Units 1 and 2, as described in a letter dated February 21,1986. The l

proposed changes are either administrative in reture or are to comply with the generic concerrs of HPA B.24 as it is related to demonstration of conte.inment i

purge and vent valve operability. Based on the enclosed safety evaluation report (Enclosure 1), the Plant Systems Branch concludes that the proposed i

Technical Specifications are acceptable.

There is one possible follew-up item that should be ci rified with the t

l licensee, however. There is scoe question as to how.he licensee intends to preclude opening the pursv, vent valve beyond the 50 degree angle as s act'ie<

l in the T$. Discussions with the Mechanical Engin6ering Branci (MEB) me l

indicated that a positive stop is required on the valve to prevent opening j

beyond the 75 angle. Operational procedures, by themselves, are not acceptable.

Since none of the incoming inferination addresses how the opening will be i

limited, the Project Manager should verify with the licensee that a positivy stop has been installed on the valve.

If this is not the case, this issue should be pursued with MEB.

I 91onsta el-xf?

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Daniel Muller l

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• l Our SALP input is provided in Enclosure 2.

We consider our efforts on TAC Ncs. 55417 and 55418 to be complete l

A A. 6 2 1

red S. Wereiel Actiep Chief Plant Systems Bra,nch Division of Engireering and Systems technology faclosures.

As stated f

cc w/ enclosures; i

C. Patel CONTACT: J. Kudrick f

20871

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