ML20134L400

Forwards SER Which Sets Forth Details of NRC Review of 960910 Submittal Associated W/Amends 152 & 144

ML20134L400
Person / Time
Site:	Catawba
Issue date:	11/19/1996
From:	Tam P NRC (Affiliation Not Assigned)
To:	Mccollum W DUKE POWER CO.
Shared Package
ML20134L403	List: ML20134L400 ML20134L408
References
TAC-M94192, TAC-M94193, TAC-M95256, TAC-M95257, NUDOCS 9611200310
Download: ML20134L400 (3)

Text

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S  !

'A ' Mr. William R. McCollum November 19, 1996 Site Vice President Catawba Nuclear Station L Duke Power Company I 4800 Concord Road i York, South Carolina 29745-9635

SUBJECT:

CATAWBA NUCLEAR STATION - STANDBY NUCLEAR-SERVICE WATER POND ANALYSIS MODEL (TAC NOS. M94192, M94193, M95256,-AND M95257)

Dear Mr. McCollum:

As a result of a Region II initiative (Task.. Interface' Agreement, TIA 95-10),

the staff revisited the validity of the calculations and model used by the Duke Power Company (DPC) for predicting the safety performance of the Standby Nuclear Service Water Pond (SNSWP) to mitigate. the consequences of an accident. In a related action, DPC requested and subsequently' received

, Amendments 152 (for Unit 1) and 144-(for Unit 2) to raise'the minimum water l level in the SNSWP by 1 foot. One of DPC's submittals to support:these

[ amendments, dated September 10,&l996, contains details of DPC's: analysis l

model, raw data, and related information. The staff did-not report its detailed review of that submittal in the safety evaluation associated with l

l-

' Amendments 152 and 144.

{' The enclosed Safety Evaluation, performed by the NRC Office of Nuclear

~

i. ' Material Safety and Safeguards (NMSS), sets forth details of the staff's i-review of the September 10, 1996,' submittal. The staff concludes'that 1

j (1) raising the pond water level (approved by Amendments 152 and 144) would have no detrimental effect on the performance of the pond; (2) peak pond j temperature for a loss-of-coolant accident in one unit and normal shutdown in

,- the other, under conditions of worst-case meteorology, would be less'than

!: 100.*F; and (3) the pond could supply water below 92 *F for up to 12.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

' DPC's analyses took into consideration the best estimates of heat load, meteorology and thermal hydraulic behavior of the pond. - The staff's '

evaluation and conclusions supplement Section 9.2.5, " Ultimate Heat Sink,"

of the Catawba Safety Evaluation Report (NUREG-0954) and supplements.

/

Sincerely, j . Original signed by

Peter S. Tam, Senior Project Manager Project Directorate II-2 j

Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation 1 Docket Nos. 50-413 and 50-414 m DISTRIBUTMON:  ! :

L

Enclosure:

Safety Evaluation *Docketf'i'er- JZwolinski \

! cc w/ encl: See next page PUBLIC PDII-2 Rdg.

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! attachment / enclosure "E" = copy with attachment / enclosure "N" = No copy OFFICE PM:PDII-2/2, - LA:PDII-\Z 1 1 D:PDl2i M

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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20666 4001 November 19, 1996 k . .. . . j/

Mr. William R. McCollum Site Vice President

Catawba Nuclear Station 1 Duke Power Company 4800 Concord Road York, South Carolina 29745-9635

SUBJECT:

CATAWBA NUCLEAR STATION - STANDBY NUCLEAR SERVICE WATER POND ANALYSIS MODEL (TAC NOS. M94192, M94193, M95256, AND M95257)

Dear Mr. McCollum:

As a result of a Region II initiative (Task Interface Agreement, TIA 95L10), 4 the staff revisited the validity of the calculations and model used by the Duke Power Company (DPC) for predicting the safety performance of the Standby Nuclear Service Water Pond (SNSWP) to mitigate the consequences of an '

accident. In a related action, DPC requested and subsequently received  !

Amendments 152 (for Unit 1) and 144 (for Unit 2) to raise the minimum water )

level in the SNSWP by 1 foot. One of DPC's submittals to support these amendments, dated September 10, 1996, contains details of DPC's- analysis i

model, raw data, and related information. The staff did not report its detailed review of that submittal in the safety evaluation associated with Amendments 152 and 144.

The enclosed Safety Evaluation, performed by the NRC Office of Nuclear Material Safety and Safeguards (NMSS), sets forth details of the staff's  !

review of the September 10, 1996, submittal. The staff concludes that (1) raising the pond water level (approved by Amendments 152 and 144) would have no detrimental effect on the performance of the pond; (2) peak pond temperature for a loss-of-coolant accident in one unit and normal shutdown in the other, under conditions of worst-case meteorology, would be less than 100 *F; and (3) the pond could supply water below 92 *F for up to 12.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

DPC's analyses took into consideration the best estimates of heat load, meteorology, and thermal hydraulic behavior of the pond. The staff's evaluation and conclusions supplement Section 9.2.5, " Ultimate Heat Sink,"

of the Catawba Safety Evaluation Report (NUREG-0954) and supplements.

Sincerely, r

j h

4 Pete . Tam, Senior Project Manager Project Directorate II-2 Division of Reactor Projects - I/II i

Office of Nuclear Reactor Regulation Docket Nos. 50-413 and 50-414

Enclosure:

Safety Evaluation cc w/ encl: See next page 1

4

Mr. W. R. McCollum Duke Power Company Catawba Nuclear Station

cc

Mr. M. S. Kitlan North Carolina Electric Membership i Regulatory Compliance Manager Corporation Duke Power Company P. O. Box 27306

i. 4800 Concord Road Raleigh, North Carolina 27611 i York, South Carolina 29745 l Senior Resident Inspector Mr. Paul R. Newton 4830 Concord Road .

Legal Department (PB05E) York, South Carolina 29745 l Duke Power Company 422 South Church Street Regional Administrator, Region II i Charlotte, North Carolina 28242-0001 U. S. Nuclear Regulatory Commission

{ 101 Marietta Street, NW. Suite 2900 J. Michael McGarry, III, Esquire Atlanta, Georgia 30323 Winston and Strawn

! 1400 L Street, NW Max Batavia, Chief

• Washington, DC 20005 Bureau of Radiological Health South Carolina Department of North Carolina Municipal Power Health and Environmental Control Agency Number 1 2600 Bull Street i 1427 Meadowwood Boulevard Columbia, South Carolina 29201 J

P. 0.' Box 29513 l Raleigh, North Carolina 27626-0513 Mr. G. A. Copp

Licensing - EC050 Mr. Peter R. Harden, IV Duke Power Company 1 Account Sales Manager 526 South Church Street Westinghouse Electric Corporation Charlotte, North Carolina 28242-0001 l Power Systems Field Sales

P. O. Box 7288 Saluda River Electric Charlotte, North Carolina 28241 P. O. Box 929

~

Laurens, South Carolina 29360 County Manager of York County l York County Courthouse Ms. Karen E. Long York, South Carolina 29745 Assistant Attorney General i North Carolina Department of Justice

Richard P. Wilson, Esquire P. O. Box 629 Assistant Attorney General Raleigh, North Carolina 27602 l South Carolina Attorney General's

! Office Elaine Wathen, Lead REP Planner d

P. O. Box 11549 Division of Emergency Management Columbia, South Carolina 29211 116 West Jones Street

,. Raleigh, North Carolina 27603-1335 j Piedmont Municipal Power Agency

121 Village Drive Dayne H. Brown, Director i Greer, South Carolina 29651 Division of Radiation Protection j N.C. Department of Environment, 1

Mr. T. Richard Puryear Health and Natural Resources Owners Group (NCEMC) P. O. Box 27687 l Duke Power Company Raleigh, North Carolina 27611-7687

! 4800 Concord Road j York, South Carolina 29745 l

1 i

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