ML19331E435

Forwards Request for Addl Info Re Bypass & Reset of Engineered Safety Features

ML19331E435
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	08/14/1980
From:	Novak T Office of Nuclear Reactor Regulation
To:	Peoples D COMMONWEALTH EDISON CO.
References
NUDOCS 8009100178
Download: ML19331E435 (4)

Text

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of UNITED STATES.

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-g NUCLEAR REGULATORY COMMISSION J'9,,Q;j/ -

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WASHINGTON. D. C. 2055$

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August 14,'1980 4

~. Docket Nos. 50-295

't and 50-304' L'

Mr. D. Louis Peoples Director of Nuclear Licensing.

Commonwealth Edison Company Post Office Sox 767 Chicago, Illinois 60690

Dear Mr. Peoples:

' We' are continuing our long term review of the generic issue on containment purging and venting for Zion Station.. In your letter of December 14,.

1979, in response to our October 23, 1979 recuest for your commitment to the " Interim Position" you provided your commitment.

e We confirmed your commitment by Item B.4 of Appendix A to Confirmatory Order dated February 29, 1980.

It should be clear to you that our understanding is that the commitment. remain effective pending completion i

of our long term review of this generic issue. At that time a Safety j

Evaluation and-appropriate Technical Specifications will be issued.

To continue with the electrical override review, we need additional infor-mation as shown :n the enclosure. You are requested to provide the

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additional information within 45 cays' of receiot of this letter.

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Sincerely, i

Dm7mw/

i Thomas M. Novak, Assistant Director for Operating Reactors Division of Licensing inclosure:

sc'est for Additionai Inicemation i

Oc: W/ enc.osJre

.See next page.

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Mr'.' O. Louis L?eeples Lj; Ccamonwealth Edison Cohcany ' -

August 14, 1980

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i cc: Robert J. Vollen, Esquire

.i 109 North Dearoorn Street Chicago, -Illi nois 60602

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'Dr. Cecil'Lue-Hing

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Directer of Research and Development Metropolitan Sanitary District of ~ Greater Chicago

~100 Eas: Erie Street Chicago, Illinois 60611

' Zion-Benton Public Library Distric:

2600 Emmaus Avenue cion, Illinois. 60099 Mr. Phillip P. Steptce.

Isnam, Lincoln and Beale Counselcr s at Law One Firs: National Plaza 42nd Flcer Chicago, Illinois 60603 Susan H. Sekuler, Esquire

Assistant Attorney General Environmental Control Civision 188 West Randolch Street,- Suite 2315 Chicago.-Illinois 60601

.U. S. Nuclear Regula: cry Ccamissicn Residen: Instec crs Office 105 Shilch Sivd.

2 Zicn, Illinois -60099 l

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ENCLOSURE-i" h-ZION UNITS 1 AND 2-REQUEST FOR ADDITIONAL INFORMATION BYPASS AND RESET OF

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ENGINEERED SAFETY FEATURES

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1.

For the CVI system, describe the extent to which the input i

instrumentation channels (including sensors). logic, etc. have

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been qualified to withstand the environmental and seismic conditions that could be expected to exist.at the point of installation during postulated accidents.

t 2.

For the Control Room. Isolation system, describe the extent to which I

the input instrumentation. channels (inclucing sensors), logic, etc.

have been qualified to withstand the environmental and seismic conditions that could be expected to exist at the point of i

installation during postulation accidents.

3.

Referring to drawing M-536-A do valves l A0V-RVC001, i A0V-RV0002, lA0v-RV0003 and 1A0V-RV0004 require air-to-open or require air-to-l -

close?

4 Referring to drawing 22E-1-4540, pages RV 43 and RV aa, provide tne l

following:

a.

Describe the conditions under which contacts RS917-2 and RS918-1 are actuated, b.

Drawing for switch CS-2 develooment (22E-1-4840 P. RV96).

I c.

Describe the function of valves ISV-PP36A and ISV-PP3EE.

5.

Referrf ig to crawing 22E-14840, pages RV 45 and RV-45, describe the cot.citions under wnich centacts RCV 17-1 and RCV 18-1 are actuated.

E.

Referring to drawing 22E-14840, pages RV-49 and RV-50, provide the following:

a.

P&I drawing showing the use of heating Water and Furge System isolation valves RVil3 and IFCV-RV-ilc.

.b.

Describe tne conditions under wnicn contacts R34A 17-2 and RS4A

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15-1 are actuated.

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7.

Provide electrical schematics showing the actuating mechanisms and any bypass, test and reset switches associated with contacts CRI/TR1, snown on drawing 22E-0-4840, page PV15.

8.

Provide three copies of each of the following drawings:

a.

22E-1-4840, page RP38 b.

22E-1-4840, page RP40 c.

22E-1-4840, page RP45 9.

Provide operating instructions and develocnent drawing for control switch (instrument numbers OHS-PV07 and CHS-PV08).

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