ML20136G082

Forwards RAI in Order to Complete Review of Licensee Request for Amend to Modify Svc Water Head Tanks for Plant

ML20136G082
Person / Time
Site:	Calvert Cliffs
Issue date:	03/13/1997
From:	Dromerick A NRC (Affiliation Not Assigned)
To:	Cruse C BALTIMORE GAS & ELECTRIC CO.
References
TAC-M98093, NUDOCS 9703170192
Download: ML20136G082 (4)

Text

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,Mr. Charles H. Cruse March 13, 1997 l Vice President - Nuclear Energy 1 Baltimore Gas and Electric Company Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway I Lusby, MD 20657-4702 l

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - PROPOSED AMENDMENT REGARDING MODIFICATION TO THE SERVICE WATER HEAD TANKS (TAC N0. M98093)

Dear Mr. Cruse:

By letter dated March 6,1997, the Baltimore Gas and Electric Company requested an amendment to modify the Service Water Head Tanks for Calvert Cliffs Unit No. 2. The NRC staff is reviewing your submittal and has determined that additional information is required for us to complete our review. The information requested is addressed in the enclosure. In order to l

. meet your schedule, the staff requests that the additional information be l provided by March 24, 1997. '

If you have any questions regarding this matter, please contact me at (301)

415-3473. I Sincerely,

/s/ l Alexander W. Dromerick, Senior Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation j Docket No. 50-318

Enclosure:

Request for Additional

, Information cc w/ encl: See next page DISTRIBUTION:

Docket File S. Varga S. Little ACRS PUBLIC J. Zwolinski A. Dromerick L. Doerflein, RI PDI-1 R/F S. Bajwa 0GC CWu I I

pfol J NRC RLE CENTER COPY DOCUMENT NAME: G:\CC1-2\M98093.RAI To receive a copy of this document, indicate in the box: "C" - Copy without attachment / enclosure

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"E" - Copy with attachment / enclosure "N" - No copy orrice en:p9te;/y /) IE LA: poi.i ,o( l o: Pol 1 ,a l l l NAME ADMadripEWst SLittle N $8aJwa 4YD DATE 03/, A /97 03/1 4 97 03//% /97 b Official Record Copy 9703170192 970313 PDR P

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2 NUCLEAR REGULATORY COMMISSION WASHINGTON, o.C. 2006& 4001 March 13, 1997

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Mr. Charles H. Cruse Vice President - Nuclear Energy Baltimore Gas and Electric Company

Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - PROPOSED AMENDMENT REGARDING MODIFICATION TO THE SERVICE WATER HEAD TANKS (TAC N0. M98093)

Dear Mr. Cruse:

l By letter dated March 6,1997, the Baltimore Gas and Electric Company l l requested an amendment to modify the Service Water Head Tanks for Calvert i Cliffs Unit No. 2. The NRC staff is reviewing your submittal and has determined that additional information is required for us to complete our review. The information requested is addresst.d in the enclosure. In order to meet your schedule, the staff requests that the additional information be provided by March 24, 1997.

If you have any questions regardir1 this matter, please contact me at (301) 415-3473.

Sincerely, Alexander W. Dromerick, Senior Project Manager Project Directorate I-1

Division of Reactor Projects - I/II

. Office of Nuclear Reactor Regulation Docket No. 50-318

Enclosure:

Request for Additional Information cc wfencl: See next page L_

f'

, Mr. Charles H. Cruse Calvert Cliffs Nuclear Power Plant Baltimore Gas & Electric Company Unit Nos. I and 2 l cc:

i President Mr. Joseph H. Walter, Chief Engineer

Calvert County Board of Public Service Commission of Commissioners Maryl ar.d 175 Main Street Engineering Division l Prince Frederick, MD 20678 6 St. Paul Centre James P. Bennett, Esquire l Counsel Kristen A. Burger, Esquire 2 Baltimre Gas and Electric Company Maryland People's Counsel i P.O. Box 1475 6 St. Paul Centre Baltimore, MD 21203 Suite 2102 Baltimore, MD 21202-1631 Jay E. Silberg, Esquire Shaw, Pittman, Potts, and Trowbridge Patricia T. Birnie, Esquire 2300 N Street, NW Co-Director

, Washington, DC 20037 Maryland Safe Energy Coalition a

P.O. Box 33111 i Mr. Terrence J. Camilleri, Director, Baltimore, MD 21218 NRM

Calvert Cliffs Nuclear Power Plant Mr. Larry Bell j 1650 Calvert Cliffs Parkway NRC Technical Training Center i

Lusby, MD 20657-4702 5700 Brainerd Road 4

Chattanooga, TN 37411-4017 Resident Inspector U.S. Nuclear Regulatory Commission i 'P.O. Box 287 i St. Leonard, MD 20685 i Mr. Richard I. McLean

Administrator - Radioecology 1 Department of Natural Resources 4

580 Taylor Avenue Tawes State Office Building, B3 Annapolis, MD 21401 Regional Administrator, Region I U.S. Nuclear Regulatory Commission

, 475 Allendale Road l King of Prussia, PA 19406 e

l: REQUEST FOR ADDITIONAL INFORMATION PROPOSED AMENDMENT FOR MODIFICATION TO THE SERVICE WATER HEAD TANKS .

! CALVERT CLIFFS NUCLEAR POWER PLANT. UNIT NO. 2 l 1

l. Describe operation of the service water system during normal and accident conditions, including alignment and sequencing of valves and components. Identify worst-case scenarios and system response,

i. including relevant parameters and assumptions. Provide a simplified l l diagram of the system showing all components that are relevant to the I j kmendment request.

. 2. Describe the specific design c' ges that are required to accommodate 1 higher head tank pressure.

I i 3. Explain the basis for increasing the head tank design pressure from 15  ;

a psig to 25 psig. '

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{ 4. Explain the specific head tank pressure and level requirements for l l

system operability, including basis (i.e., worst-case scenarios). l Describe how level and pressure alarm setpoints were determir.ed.

Discuss minimum time to boiling in the service water system and

available margin.

! 5. Discuss system leakage and pressure decay restrictions to maintain

!- system operability. Describe post-modification, periodic testing, and i- surveillances that will be performed to assure system operability, i

6. Discuss the effect of increased service water system pressure on pipe 3 break scenarios.

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7. Identify relief valve setpoints and bases. Discuss post-modification, 1 periodic testing, and surveillances that will be performed to assure

operability.

l E. Perform failure modes and effects analysis and discuss the results.

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9. vss design requirements and standards associated with indication, we al, and control room annunciation for head tank level and pressure

) ,nstruments and circuits, number of channels for each head tank, and i power supply requirements. Discuss post-modification testing, periodic 3

testing, and surveillances that will be performed to assure operability.

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10. Discuss local terperature effects on the head tanks during accident conditions.

11. Discuss the basis for continued operability of the service water systems for both Units 1 and 2.

12. Describe any additional post-modification testing, periodic testing, and surveillances that will be performed to assure system operability (e.g.,

integrated system response testing).

Enclosure

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