ML20134D351

Requests Addl Info Re Proposed Amend That Would Allow Licensee Control to Reactor Coolant Sys Pressure & Temp Limits for Heatup,Cooldown,Low Temp Operation & Hydrostatic Testing

ML20134D351
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	10/18/1996
From:	Shiraki C NRC (Affiliation Not Assigned)
To:	Johnson I COMMONWEALTH EDISON CO.
References
TAC-M96228, NUDOCS 9610220019
Download: ML20134D351 (3)

Text

. _ _ _ _ _ _ _ _ _ _ _ _ _ ~ _ . _ _ . . _ _ _ . . . . _ _ . _ _ . - . - _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _

l i

October 18, 1996

, Ms. Irene Johnson, Acting Manager Nuclear Regulatory Services

. Commonwealth Edison Company i Executive Towers West III l 1400 Opus Place, Suite 500 Downers Grove, IL 60515

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - ZION NUCLEAR POWER STATION,

! UNITS 1 AND 2 (TAC NOS. M96228 AND M96229) i

Dear Ms. Johnson:

l In a submittal-dated July 26, 1996, Commonwealth Edison Company (Comed) submitted a request to amend the Zion Technical Specifications. The proposed

" amendments would allow licensee control of the reactor coolant system pressure

and temperature limits for heatup, cooldown, low temperature operation and i hydrostatic testing. Additional information, as discussed in the enclosure, i is requested for the staff to complete its review.

l To ensure timely review and final action on the amendment request, a response to this request for additional information (RAI) is needed as soon as possible. I Sincerely, Original signed by-Lawrence W. Rossbach for:

Clyde Y. Shiraki, Project Manager Project Directorate III/2 Division of Reactor Projects - III/IV Office of Nucitar Reactor Regulation Docket Nos. 50-295, 50-304 F.aclosure: RAI cc w/ enc 1: see next page hD Distribution:

~. Docket. File PUBLIC PDIII-2 r/f C. Shiraki E. Adensam, EGA1 J. Roe, JWR Obc B18 bR E26 M. Dapas, rip 3 Q Q98 NRC HLE CENTER COPY DOCUMENT NAME: ZION \ZI96228.RAI To reoolve e copy of this document,ind9 aea,in,the px: "C" = Copy without enclosures *E" = Copy with enclosures "N" = No copy 0FFICE PM:PDIII-2 lE l LA:RDIAJ-2 l & A:PDIII-2 / J

( tSHIRAKI yG// M

~

NAME M2100RE ' d1CAPRA DATE 10//f/96 10/ V/96 f%/// /96' 9610220019 961018 FICIAL RECORD COPY PDR ADOCK 05000295 P PDR

5 l

I. Johnson Zion Nuclear Power Station l 3 Commonwealth Edison Company Unit Nos. 1 and 2 CC:

1 Michael I. Miller, Esquire l Sidley and Austin l One First National Plaza l

Chicago, Illinois 60603 l

Dr. Cecil Lue-Hing Director of Research and Development Metropolitan Sanitary District of Greater Chicago 100 East Erie Street

] Chicago, Illinois 60611 Phillip Steptoe, Esquire i Sidley and Austin One first National Plaza

Chicago, Illinois 60603 Mayor of Zion Zion, Illinois 60099 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 U.S. Nuclear Regulatory Commission Zion Resident Inspectors Office 105 Shiloh Blvd. ,

Zion, Illinois 60099 Regional Administrator U.S. NRC, Region III 801 Warrenville Road Lisle, Illinois 60532-4351 Station Manager Zion Nuclear Power Station 101 Shiloh Blvd. ,

Zion, Illinois 60099-2797 '

Document Control Desk-Licensing Commonwealth Edison Company 1400 Opus Place, Suite 400 Downers Grove, Illinois 60515

4 i

RE0 VEST FOR ADDITIONAL INFORMATION ZION NUCLEAR POWER STATION. UNITS 1 AND 2  !

DOCKET NOS. 50-295 AND 50-304

1. The WCAP-14040-NP-A analycis accounts for only a single reactor coolant pump (RCP) in LTOP operation. How does Zion justify running more than j one RCP7

2. The proposed wording for LC0 3.3.2.G.3 verifies the 50 degree Fahrenheit temperature difference when starting the first RCP. Is this criteria also met when starting additional pumps?

3. Please submit calculations for: a) the pressure difference between the limiting location and the pressure transmitter as a result of static and I dynamic head, b) the LTOP PORV lift setpoint, and c) the LTOP enable temperature. Include an explanation of how the 60 psig and 10 degree Fahrenheit conservatism, which are included in the current technical specification curves, are accounted for in these calculations. Also discuss how the dynamic head effect during different pump configurations is accounted for and controlled at Zion.

4. Describe how the LTOP response time was accounted for in the LTOP analysis and discuss the effects of more than one RCP running on the response time and peak pressure.

1 l

ENCLOSURE

__