ML20055A328

Forwards Revised Pages LM/45,317/2 & 317/4 & Page 2-311/3 for Interactive Cable Analysis of Units 1 & 2,respectively. Changes Discussed at 820618 Meeting W/Nrc in Bethesda,Md

ML20055A328
Person / Time
Site:	Calvert Cliffs
Issue date:	07/07/1982
From:	Ash R BALTIMORE GAS & ELECTRIC CO.
To:	Clark R Office of Nuclear Reactor Regulation
References
NUDOCS 8207160155
Download: ML20055A328 (8)

Text

BALTIMORE GAS AND ELECTRIC CHARLES CENTER . P.O. BOX 1475 BALTIMORE, MARYLAND 21203 ELECTRIC ENGINEERING }gl 7 ggg]

DEPARTMENT Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attn: Mr. Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing

Reference:

(a) Interactive Cable Analysis for Calvert Cliffs Nuclear Power Plant Unit No.1, October 1,1981 (Green Book)

(b) Interactive Cable Analysis for Calvert Cliffs Nuclear Power Plant Unit no. 2, February 1,1982 (Blue Book)

Gentlemen:

This letter transmits revised pages LM/45, 317/2 and 317/4 for the Unit 1 Interactive Cable Analysis (ICA), Reference (a), and page 2-311/3 for the Unit 2 ICA, Reference (b), as well as revised cover sheets for both ICA's. Please insert the new pages in your copies of the ICA's.

The changes were discussed in a meeting between members of the NRC staff and BG&E held in Bethesda on June 18, 1982, and conducted by Mr. D. H. Jaffe. The changes for each ICA concern LPSI Pump power cables and are indicated by a solid line in the margin of each page.

If there are any further questions, please do not hesitate to ask.

V trul yours, R. F. Ash Supervising Engineer Electric Engineering Department MDP:gvg cc: 3. A. Biddison, Jr., Esquire l G. F. Trowbridge, Esquire

! Mr. D. H. Jaffe - NRC /

e 8207160155 820707 PDR ADOCK 05000317 P

PDR

Mr. Robert A. Clark July 7,1982 bc : Messrs. R. P. Hunt P. E. Katz C. H. Cruse G. W. Powell A. R. Thornton R. C. L. Olson M. D. Patterson R. F. Ash / File b-J

f l lNTERACTIVE CABLE ANALYSIS i

i FOR CALVERT CLIFFS NUCLEAR POWER PLANT

.i UNIT NO. 2

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Page 2-311/3 revised 6/22/82 PREPARED BY ELECTRIC ENGINEERING DEPART!AENT

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FEBRUARY 1,1982

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i INTERACTIVE CABLE ANALYSIS

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i CALVERT CLIFFS NUCLEAR POWER PLANT j UNIT NO.I t

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Pages LM/45, 317/2, and 317/4 revised 6/22/82 PREPARED BY ELECTRIC ENGINEERING DEPARTMENT OCTOBER 1,1981

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. to Unit 2 shutdown cooling heat exchangers from Unit 1. All Unit 1 salt-water pumps, component cooling pumps and related valves and cables are independent of this area.

2-MOV-635 and 2-MOV-645 are redundant to 2-MOV-615 and 2-MC -625 and are independent of this area. All four valves can be operated manually.

For cold shutdown operations, sufficient time exists to operate 2-MOV-658 after removing power at its MCC.

2MB406 (#22 Component Cooling Pump) is redundant to 2MB106 and 2MB116 and is independent of this area. Additionally, component cooling water can be supplied to Unit 2 shutdown cooling heat exchangers from Unit 1. All Unit 1 saltwater pumps, component cooling pumps and related valves and cables are independent of this area.

Power cables for 2MA404 will be relocated to provide separation to cables related to 2MA104.

No modifications are required for items 12, 13 and 22 24 for diesel' cooling. Cooling can be provided to any diesel generator from the Unit 1 service water system indpendent of a fire in this area.

There are no power or control cables or equipment associated with D.G.21 or 4 kV bus 24 in this room. D.G.21 can be aligned with bus 24 and .

D.G.12 with bus 11.

The power cables from 3.G.12 cill be isolated with a manual disconnect siwtch, locked closed at D.G.12. Redundant battery chargers 11 and 14 fed from 4 kV bus 11 will be available. No modification is required for MCC11C s'ince D.C.11 will not be used. No modification is

. required for the auxiliary transfer switch since 4 kV bus 21 will not be used.

No modifications are required for D.G.ll control, item 34. The proposed diesel generator line-up requires the use of D.G.12 and D.C.21 only. Placing the existing D.G.11 local remote switch in local isolates D.G.ll engine control. Current transformer (CT) leads from 4 kV bus 11 for D.G.11 differential protection do not pass through this room, Therefore, D.G.ll control could be isolated from this room.

No modifications are required for D.G.12 control, item 34.

Placing the existing D.G.12 local remote switch in local isolates D.G.12 engine control. C.T. leads from 4 kV bus 11 for D.G.12 differential protection do not pass through this rooc, therefore D.G.12 control would be isolated from this room.

Revised 6/22/82 2-311/3

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,. 19 control cable for 1-cV-3828 - CS/RHR

20. Power and control cables for 1-MOV-615 - CS/RHR

21. Power and control cables for 1-MOV-625 - CS/RHR

22. Powerandcontrolcablesfor1-MOV-658-CS/RHR

23. Powen control, annunciator and instrumentation cables for IMB106 (#11 component Cooling Pump) - cS/RHR

24. Power, control, annunciator and- instrumentation cables for IMB116 (#13 component cooling Pump) - CS/RHR 25 Power, control, instrumentation and annunciator cables for IMA104(#11LPSIPump)-CS/RHR

26. Power cables and disconnect switches for D.G.ll and D.G.12 - VS 27 Feeder breakers from D.G.11 and D.G.12 and related cables - VS

28. Feeder breakers for 480V bus 11A and llB and related cables - VS 29 480V breaker and feeder cable for nce 114R - VS

30. Feeder breakers and power cables for battery chargers 11 and 14 - VS 31 control cable for the ZA auxiliary transfer switch for D.G.12 - VS

32. control cable for Mcc11G. for D.G.ll - VS 33 4 kV bus 11 and 480V bus 11A and llB - VS

34. D.c. power cables to 4 kV bus 11 and 480V bus 11A and llB - VS

35. Power cables for IMA404 (#12 LPSI Pump) - CS/RHR.

ANALYSIS AND MODIFICATIONS AW pump #12 is redundant to AW pump #11 and is independent of this area.

1-MOV-4071 is redundant to 1-MOV-4070 and is independent cf this area.

317/2 Revired 6/22/82

1-MOV-635 and 1-Mov-645 are redundant to 1-MoV-6:<5 and 1-Mcc-625 and are independent of this area. All four valves can be operated cc.nually. '

For cold shutdown operations, sufficient time exists to operate 1-MoV-658 after removing power at its MCC.

1RB406 (#12 Component Cooling Pump) is redundant to 11G106 and 1MB116 and is independent of this area. Additionally, component cooling water can be supplied to Unit 1 shutdown cooling heat exchangers from Unit 2. All Unit 2 saltwater pumps, component cooling pumps and related valves and cables are independent of this area.

Power cables for 1MA404 will be relocated to provide separation to cables related to IMA104.

There are no power or control cables or equipment associated with D.G.21 or h kV bus 14 in this room. Redundant switchgear, cables, and battery chsrgers vill remain available for safe shutdown of Unit 1.

The power cables from D.G.12 will be isolated with a manual disconnect switch, locked closed, at D.G.12. P.G.12 can be used for bus 21.

Redundant battery chargers 22 and 23 fed from 4 kV bus 21 will be availatie.

No modification is required for MCCllG since D.G.ll will not be used. No modification is required for the transfer switch cince 4 kV bus 11 will not be used.

Revised 6/22/82 317/4