ML13330A053

Forwards Results of Investigation of Anchorage of safety- Related Electrical Equipment

ML13330A053
Person / Time
Site:	San Onofre
Issue date:	05/23/1980
From:	Baskin K Southern California Edison Co
To:	Crutchfield D Office of Nuclear Reactor Regulation
References
TASK-03-11, TASK-3-11, TASK-RR NUDOCS 8006030373
Download: ML13330A053 (6)

Text

Southern California Edison Company P. 0. BOX BOO 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 K. P. BASKIN May 23, 1980 TELEPHONE MANAGER, NUCLEAR ENGINEERING (213) 572-1401 ANO LICENSING Director of Nuclear Reactor Regulation.

Attention: D. Crutchfield, Chief Operating Reactors Branch No. 5 Division of Operafing Reactors U. S. Nuclear Regulatory Commission Washington, D. C. 20555.

Gentlemen:

Subject:

Anchorage and Support of Safety Related Electrical Equipment San Onofre Nuclear Generating Station Unit 1 Mr. D. L. Ziemann's letter of January 1, 1980, requested an investigation of safety related electrical equipment to ensure that positive anchorage exists. The results of this investigation for electrical equipment at San Onofre Unit 1 are summarized in the enclosure to this letter. In all cases where positive anchorage does not exist or where the existing anchorage may not be adequate, temporary modifications are being implemented during the current refueling outage.

If you have any questions on this information, please let us know.

Enclosure 8ooo 373

Page 1 of 5 Enclosure Results of Investigation of Anchorage of Safety Related Electrical Equipment San Onofre Nuclear Generating Station, Unit 1 No Positive Positive Positive Item Equipment Anchorage-Anchorage-2 Anchorage No.

Description Location No Modification Modification Modification Remarks

1.

4160 V Switchgear 4 kV Switchgear X

Provide additional welds Bus 1C & 2C Room to existing embedded steel

2.

480 V Switchgear 4 kV Switchgear X

Provide additional ancho*e

1. 1 Room to existing embedded steel

3.

480 V Switchgear 4 kV Switchgear X

1. 1B Room

4.

Motor Control 4 kV Switchgear X

Provide additional anchors Center #1 & #1A Room to existing embedded steel

5.

Auxiliary Relay 4 kV Switchgear X

Panels Room

6.

Reactor Trip 4 kV Switchgear X

Provide additional welds Switchgear Room to existing embedded steel

7.

120 VAC Power 4 kV Switchgear X

Provide additional welds Distribution Room

- to existing embedded.ste Panel

8.

H/V Control 4 kV Switchgear X

ProVIde additional anchors Board Room to existing embedded steel (1) Positive anchorage exists to these items and is judged adequate, pending completion of detailed analyses.

(2Y Positive anchorage exists for these items; however, pending completion of detailed analyses, it is judged that additional-anchors willri provide greater assurance that these items will have sufficient anchorage.

(3)

Positive anchorage does not exist for these items; anchorage will be provided.

Page 2 of 5 No Positive Positive Positive Item Equipment Anchorage-Anchorage-Anchorage No.

Description Location No Modification Modification Modification Remarks

9.

480 V Switchgear 480 V Switchgear X

Provide additional anchors

1. 2 & #3 Room to existing embedded steel

10.

480 V Switchgear 480 V Switchgear X

1. 2B Room

11.

DC Contactors 480 V Switchgear X

(D12 &.D13)

Room

12.

Motor Control 480 V Switchgear X

Provide additional anchors Center #2 Room to existing embedded steel

13.

Main Control Control Room X

Provide additional welds Board Console to existing embedded steel (C03 & C06)

14.

Process Control Control Room X

Racks R6 & R7

15.

Process control Control Room X

Provide anchors to Racks R10, R11, concrete floor R1 through R5

16.

Process Control Control Room X

Provide additional Racks R12, R13 anchors to concrete floor

& R14

17.

Vertical Control Control Room X

Boards (CO5, C09 C12 & C13)

18.

Nuclear Instrum.

Control Room X

Provide additional anchors System (C10) to concrete floor

Page 3 of 5 No Positive Positive Positive Item Equipment Anchorage-Anchorage-Anchorage No.

Description Location No Modification Modification Modification Remarks

19.

Radiation Moni-Control Room X

Provide additonal.anchors toring System to concrete floor

20.

CSAS Inverter Control Room X

21.

Diesel Generator Control Room X

Control Boards SPG1 (C41) &

SPG2 (C42)

22.

SEP Relay Panels Control Room.

X A & B (C60 & C61)

23.

Vital Bus Control Room X

Assembly (C16)

24.

Safeguard Load Control Room X

Sequencing System

25.

Inverter #4 Control Room X

26.

Station Battery Battery Room-X

& Battery Racks (D04 & DO4R)

27.

125 VDC Switch-D.C.. Switch-X board No.

1 (D01) gear Room

28.

Battery Chargers D.C. Switch-X A & B (D02 & D03) gear Room

29.

Inverters Nos.

D.C.. Switch-X Replace existing weld 1, 2 & 3 gear Room with new welds.

Page 4 of 5 No Positive Positive Positive Item Equipment Anchorage-Anchorage-Anchorage No.,

Description Location No Modification Modification Modification Remarks

30.

1250 kVA Station Outdoor X

Service Trans-;

formers.#1, & #2'

31.

Auxiliary Control Turbine Area.

X Panel (C38) 32..

Uninterruptible Turbine Area.

X Power Supply (Battery. Charger

& Inverter)

33.

Battery & Battery Turbine Area X

Rack for UPS

34.

MCC #3 Turbine Area X

Provide additional welds to existing embedded steel

35.

Diesel Engines Diesel Genera-X tor Building

36.

Diesel Generators Diesel Genera-X tor Building

37.

Motor Control Diesel Genera-X Center lB & 2B tor Building

38.

Battery Chargers Diesel Genera-X C & D tor Building

39.

High Voltage Diesel Genera-X Exciter Cabinets tor Building (D06 & D07)

Page 5 of 5 No Positive Positive Positive Item Equipment Anchorage-Anchorage-Anchorage No.

Description Location No Modification Modification Modification Remarks

40.

Low Voltage Diesel Genera-X Exciter Cabinets tor Building (DO8 & D09) 41'.

DC Distribution Diesel Genera-.

X Switchboard tor Building

42.

Terminal Boxes Diesel Genera-X for D.G. No. 1 tor Building:

& No. 2 (GG15 &-FG16)

43.

D.G. No. 1 &

Diesel Genera-X No. 2 Engine tor Building Control Panels (GC40 & FC48)

44.

D.G. No. 1 &

Diesel Genera-X No. 2 Local tor Building.

Control Panels (FC44 & GC45)

45.

Battery Rack Diesel Genera-X No. 2 tor Building

46.

CSAS Logic Control Room

),

Provide additional Train A anchors to concrete floor (FC62 & GC62)

47.

MCC 2A Reactor Auxiliary X

Provide additional welds Building to existing embedded steel