ML18153C858

Forwards Request for Addl Info Re App R Multiple High Impedance Fault Submittal,Dtd 901219.Responses to Request for Addl Info Submitted as Rev to Chapter 9 App a of Plant 10CFR50 App R Rept Included as Attachment 2 to Ltr

ML18153C858
Person / Time
Site:	Surry
Issue date:	12/27/1991
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
91-406A, NUDOCS 9201060060
Download: ML18153C858 (50)

Text

SURRY 1 VE&PCO Appendix R-Multiple High Irrpedance Fault Submitta Request for Additional Information Rec'd w/ltr dtd 12/27/91... 9201060060

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PLEASE DO NOT SEND DOCUMENTS CHARGED OUT THROUGH THE MAIL.

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-NOTICE-

ATTACHMENT l REQUEST FOR ADDITIONAL INFORMATION RELATING TO THE SURRY, UNITS 1 AND 2 APPENDIX R MULTIPLE HIGH IMPEDANCE FAULT SUBMITTAL DOCKET NUMBERS 50-280 AND 50-281 We have reviewed the Appendix R multiple high impedance fault submittal dated December 19, 1990, which was provided for the Surry Nuclear Station. Information in this submittal clearly suggests that a fire area by fire area analysis for all Appendix R related associated circuits was not performed.

Further, the submittal contains general concluding statements without providing supporting factual information for these statements.

In view of these items, we request the following additional information.

1.

The Appendix R high impedance fault submittal indicates that 480 Vac motor control centers (MCCs) supply a great diversity of loads located in various plant locations.

In addition, this submittal also indicates it is expected that the Unit 1 and Unit 2 480 Vac MCCs supply like unit loads located in different plant areas with power often routed in different directions. Further, the submittal indicates that it would be difficult to ascertain the physical locations of the 480 Vac MCC circuits and predict their operation.

In view of these expectations and uncer-tainties, provide additional supporting information for the concluding statement that power engineering believes that load diversity and the relatively low (50A or less) trip ratings of many of the 480 Vac MCC breakers limit the potential for tripping due to multiple high impedance faults.

2.

The submittal section addressing the 120 Vac vital bus system notes that the 120 Vac vital buses supply a limited number of loads generally located in the control room and emergency switchgear room (including the instrument rack room).

In addition, this submittal section contains

3.

the statement 11 though there are a number of associated circuits, there are expected to be few circuits not directly unit related and, therefore, routed into common areas.

11 We interpret the above to mean that there are a number of 120 Vac associated circuits in the control room and emergency switchgear room, however most of these associated circuits are expected to be specifically related with either Unit 1 or Unit 2.

Verify or clarify this interpretation and provide additional supporting infor-mation for the expectation that there are few circuits not-directly unit related and as such few circuits routed into common areas.

Miscellaneous colTITlunication equipment power supplies are: a Unit 1 120/240 Vac semi-vital bus, a Unit 1 120/240 Vac heat trace panel, and a Unit 2 120 Vac communication panel.

For these Appendix R power sources, the submittal indicates. it is expected that many of the associated circuits supplied by them are local, while others enter various plant areas.

On the basis of this expectation, it is assumed in the submittal that a sufficient number of associated circuits from one supply do not enter the redundant power supply fire area to warrant concern for multiple high impedance faults. Provide additional factual information for the above expectation and as such the resulting assumption.

CH9-APPA ATTACHMENT 2 CHAPTER 9 APPENDIX A MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION SURRY POWER STATION - UNITS I and 2 PREPARED BY VIRGINIA POWER Page 1 of 6 Revision 9

SUMMARY

Generic letter 86-10 indicates that high impedance faults should be considered for all associated circuits located in the fire area of concern to meet the

• separation criteria of Sections III.G.2 and III.G.3 of Appendix R.

In this case, associated circuits are defined as circuits not required for safe shutdown but

. powered by necessary power supplies.

The concern is that a fire expected to result in the loss of an-Appendix R power supply will also result in the loss of the redundant power supply as a result of simultaneous high impedance faults (below the trip point for the breaker on each individual circuit) of associated circuits routed into that same fire area. GL-86-10 states that the phenomenon should be considered for impact on the plants' safe shutdown capability and addressed by either a circuit coordination study or by assuming the shutdown capability will be disabled and provide written procedures to clear the faults.

Virginia Power has performed an evaluation of each Appendix R power supply and determined that the probability of loss due to simultaneous high impedance faults is either impossible in some cases or highly improbable in others for the reasons discussed in this evaluation. Therefore, no further circuit coordination study has*been performed or written procedures developed.

Surry Power Station consists of two "mirror image" units.

For fire scenarios in critical plant areas, it is necessary to depend on mechanical cross connects, etc. and shutdown both units with equipment from only one unit. Therefore, redundant equipment often comprises equipment from the opposite unit rather than from redundant channels. Because both units contain similar power supplies, it is not typically necessary to route an abundance of Unit 1 cable into Unit 2 areas and vice versa.

This is particularly true for the emergency electrical distribution system utilized for safe shutdown. This natural separation is used as a basis in this report to state that it is assumed that a sufficient number of associated circuits are not routed into fire areas of concern and that the probability of this occurring is low.

Generally, the following sections of this evaluation will provide additional analysis to supplement this reasoning.

The attachments to this analysis were prepared in late 1991; it is not intended that this information be maintained up to date based on load changes programmatically.

Future load additions or changes are expected to be consistent with the conclusions drawn from the attached tables.

4160V SWITCHGEAR The 4160V switchgear buses (IH, IJ, 2H, and 2J) are not susceptible to tripping due to multiple high impedance faults.

The sum of all overcurrent relay trip devices (phase and ground) on the buses' circuits is lower than that of the buses' main, offsite supply, circuit breakers. The same is true when the buses are supplied by their respective emergency diesel generator (phase only, the EDGs are ungrounded) due to the load shed of the "stub" bus supplying the Component Cooling and Residual Heat Removal pumps.

The stub bus would be returned to service later to achieve cold shutdown, but this should be after clearing of any other potentially faulted circuits on the buses.

Any 4160V high impedance CH9-APPA Page 2 of 6 Revision 9

fault(s) would be expected to have developed into a lower impedance fault by that time and be selectively cleared.

480V SWITCHGEAR The 480V switchgear (load center) buses (lH-1, lJ-1, 2H-1, 2J-1) are not subject to tripping due to multiple high impedance.faults on associated circuits. ~ach 480V load center consists of one feeder breaker and, typically, six load breakers. Of the six, two supply Appendix R required MCCs.

Some are spared or provide only contingency service. Therefore, there are very few (0-2) energized associated circuits originating from each Appendix R required 480V load center.

As a result, the sum of the overcurrent trip devices on the Appendix R 480V load center associated circuits, including back-up, contingency breakers is less than the feeder device trip setting.

480V MOTOR CONTROL CENTERS

• \\;,* **.; ****.=*',Numerous 480V motor,.,control centers (MCCs) are required for Appendix R, as shown on the Appendix R Evaluation Electrical One Line Diagrams for Surry Units 1 and

2. The required MCCs are located in either the Emergency Switchgear Rooms (Fire Areas 3, 4) or the cable vaults and tunnels (Fire Areas 1, 2) of the respective unit. For a fire in either of those areas of either unit, in general, the other unit's electrical distribution system is utilized for safe shutdown of both units.

The MCCs supply~ great diversity of loads located in various plant locations; it would be difficult to ascertain the physical locations of all MCC circuits.

But, as can be seen by reviewing Attachment 1, the Unit 1 and 2 MCCs predominantly supply like unit loads which would typically be located in different plant areas.

Also, the MCC loads vary in frequency of operation; a majority of the associated circuit, as shown in Attachment 1 (e.g., MOVs), are normally de-energized. As discussed in Section 3.8.4 of this Appendix R Report,

• only.fires local to the MCCs are expected to spuriously operate MOVs, i.e.,

energizing the 480V power cables. This philosophy applies equally to other de-energi zed 1 oads supp 1 i ed by motor starter/contactors.

Therefore, the 1 arge number of de-energized associated circuits, spuriously energized only for fires at the MCC, and the relatively low (50A or less) trip ratings of a majority of the associated MCC breakers limits the potential for tripping due to multiple high impedance faults.

The ungrounded 480V system at Surry warrants that a minimum of two different phase conductors are necessary to produce fault current. A single conductor in contact with a grounded object, such as a conduit or cable tray, would not draw fault current.

Two or three phase conductors are routed to each load, and in many cases, multiconductor or triplexed cables are used.

To avoid severely derating power circuits, they are sometimes routed in dedicated conduit.

The close proximity of the phase conductors would discourage high impedance faults because the little material existing between conductors would burn away quickly producing a lower impedance, high current fault.

The 480V MCCs at Surry have three-phase fault currents of 15,000 - 19,000A available at the buses.

CH9-APPA Page 3 of 6 Revision 9

Therefore, some margin typically exists between the available fault current at the end of the circuit and the breaker overcurrent/trip rating. Because of the strong sources and low MCC breaker trip ratings, there should be adequate margin to selectively operate breakers supplying either low or high impedance faults.

Additionally, for motor loads, the contactor overload heaters are sized based on nameplate fuli load current and will operate (i.e., interrupt) for values of load or fault current lower than that required to operate the breakers.

It is

• unlikely that a sufficient number-of*high impedance faults with current* l~wer than the individual breaker trip ratings, or motor contactor overloads, will exist to cause operation of the MCC feeder breakers.

For these reasons, the probability of multiple high impedance faults causing misoperation is extremely low and no special precautions are necessary.

125VDC DISTRIBUTION SYSTEM The I25VDC system is an ungrounded system requiring both a positive and negative conductor from the same bus to produce a fault.

• Faults on this system differ

• • ""from -AC*.faul ts.because. the voltage difference between the two involved conductors is constant rather than cyclic and, therefore, DC faults would tend to be uninterrupted allowing materials between the two conductors to be burned away.

This would either clear the fault or, more likely, create a low impedance fault that can be selectively cleared.

Each DC bus is simultaneously supplied by both the battery and charger. The chargers supply limited fault current and, therefore, most is supplied by the batteries. A circuit breaker between the battery charger and the bus will open for an overcurrent condition, but the batteries are connected directly to the bus. Therefore, the absence of a main bus breaker precludes the possibility of loss of power to the bus.

Power will continue to be served and th~ faults(s) would be expected to be cleared. Though the associated DC circuits have not been traced to determine routing, the diversity of DC provided equipment and locations suggests that it is unlikely that a substantial number of circuits would be routed together in such a way to compromise the DC system. The DC distribution cabinets are further limited in exposure to faults because numerous circuits supply other panels or cabinets. Additional levels of protection are provided at those points for circuits originating from those panels, etc.

For these reasons, high impedance faults are not considered a major concern on the I25VDC system and no special precautions have been taken.

120VAC VITAL BUS SYSTEM The I20VAC Vital Buses are normally supplied by current limiting inverters and alternately by current limiting voltage regulating transformers.

The vital buses supply a limited number of loads generally located in the Control Room and Emergency Switchgear Room* (including the Instrument Rack Room).

Though there are a number of associated circuits, there are few circuits not directly unit related and, therefore, routed into common areas.

CH9-APPA Page 4 of 6 Revision 9

• was prepared based on controlled station drawings.

The fire zone associated with each vital bus panel and most individual loads has been provided based on a review of plant.physical arrangement drawings and interviews with personnel familiar with plant arrangement; a small number of fire zones are not identified. Additionally, each Appendix R required circuit has been identified based on review of the Appendix R block diagrams, 11448/11548-FE-90 series drawings; all other circuits are "associated."

Note that a majority of loads for each vital bus are located in the same fire area as the bus. Additionally, the Control Room (Unit 1 side) is adjacent, directly above, the Unit 1 Emergency Switchgear Room; same for Unit 2.

Power cables between the Control Room and Emergency Switchgear Rooms are typically routed through floor sleeves directly between the areas requiring no routing into other plant fire areas. Given this physical arrangement of the plant and the information shown in Attachment 2, few associated circuits for redundant Appendix R required vital buses are routed into common fire areas.

From the Control Room and Emergency Switchgear Room circuit destinations, numerous "secondary" circuits are originated; those circuits may be routed into various plant areas but would typically be protected from that origination point

• • .,*ri,:limiting.. the *required protective zone of the Appendix R protective devices.

Also, nonsafety-related circuits entering potentially harsh environments are fused in accordance with 10 CFR 50.49(b)2.

The additional protective devices would increase the probability of interrupting the fault.

The automatic transfer from the UPS inverter to the regulating transformer will increase the available fault current by a factor of five; this design feature was intended to clear faults. The additional available fault current may provide the *current'required to selectively trip faulted branch circuits.

Additionally, at 120VAC, high impedance faults are not certain to be sustained.

For these r'easons, it is considered improbable that multiple high impedance faults will result in loss of a 120VAC vital bus and no additional precautions have been taken.

MISCELLANEOUS POWER SUPPLIES Other than the several categories of Appendix R power supplies already discussed, there are a number of other miscellaneous power supplies that do not fit into those classifications.

A 120VAC "Appendix R Distribution Panel" has been installed for each unit to supply the Remote Auxiliary Monitoring Panels.

The Appendix R panels are not subject to multiple high impedance faults because they lack a sufficient number of associated circuits.

Communication equipment is supplied from the Unit 1 120/240VAC Semi-Vital bus, two 120/240VAC heat trace panels, and an unscheduled 120VAC communications panel.

All of these are, therefore, Appendix R power supplies.

These power supplies were chosen, partially, due to the fact that they are located in different areas of the plant.

CH9-APPA Page 5 of 6 Revision 9

As shown in Attachment 3, which was prepared based on controlled station drawings, the Unit 1 Semi-Vital Bus (lSVBl) supplies loads predominantly located in the Control Room (Fire Area 5) and the Unit 1 Emergency Switchgear Room (Fire Area 3).

As stated for the Vital Buses, the Unit 1 portion of the Control Room is adjacent to the Unit 1 Emergency Switchgear Room and, therefore, cables routed between the two typically follow the shortest route through floor sleeves and into no other fire areas.

The heat trace panels supply heat tracing for the Chemical Volume and Control System (CVCS). A review of the heat tracing conduit plans (11448-FE-63 series) and Operating Procedure OP-27, * "Heat Tracing," indicates that the heat traced components are located in the Auxiliary Building (Fire Area 17).

There are very few (1-2 per panel) loads other than heat tracing, like Communications, powered by these panels.

The unscheduled communications breaker panel is located in the Unit 1 Cable Spreading Room (Fire Area 31). That panel supplies no associated circuits; it supplies only the communication equipment analyzed for Appendix R.

Accordingly, a sufficient number of associated circuits from one of these supplies does not enter the redundant power supply fire area warranting fear of multiple high impedance faults.

As in other sections of this report it is expected that most faults will either be extinguished or develop into a lower impedance, high current fault allowing proper selective tripping.

Therefore, no additional precautions or measures have been taken for any of these power supplies.

CH9-APPA Page 6 of 6 Revision 9

ATTACHMENT 1 MCCs lHl-1, *;...2N & S MCCs lJl-1, -2E & W MCCs 2Hl-1, -2N & S MCCs 2Jl-1, -2E & W Existing Circuit Breaker

Reference:

1. Calculation EE-0298, SPS 1 & 2, 480V Molded Case Circuit Breaker Replacement

2. 11448/11548-FE-1 Series Drawings

3. EWR 89-300, Evaluate MI (MOVs) Power Supply

4. Original Plant Design Cutler-Hammer Drawings 11448-1.16-155A through 274A, not inclusive, 11548-1.16-195A through 214A, not inclusive Note:

FA3015 indicates 3-phase, 15 amp, Westinghouse type FA.

In some cases, assumptions are made due to lack of information regarding a specific circuit breaker (i.e., an unknown breaker size is assumed to be identical to that of redundant equipment or a load of the same size).

Appendix R/Associated Circuits The Appendix R circuits are identified based on the Appendix R Block Diagrams (11448/11548-FE-90 series) and on Chapter 3 of this Appendix R Report; other circuits are by definition "associated."

Energized/De-energized/Intermittent Circuits circuits falling into these categories have been so designated for the purposes of this report.

For conservatism, "Energized" is used more liberally assuming various modes of unit operation.

MCP/ses-2077

BREAKER 1A 18 1C 1D 1E-1 1E-2 2A-1 2A-2 28 2C 2D-1 2D-2 3A 38 3C 3D 4A-1 4A-2 48-1 48-2 4C 4D

• SA*

58-1 58-2 SURRY POWER STATION UNIT 1 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I I *-

I LOAD EQUIP. ID EXIST.

REQUIRED I

BKR.

APPENDIX R I

I I

Main Fdr Breaker R

To MCC 1H1-1A JA3175 Ctrl rm emer sup fan 1-VS-F-41 FA3015 Charg PP serv Wt PP 1-SW-P-10A FA3040 R

Computer inverter 3-5 KVA TRANS FA3040 480 V pwr recptacle FA3100 Semi-vital Bus (alt) 1SVB1-----

HFC3070 SPARE Brg cool ht exh inlet MOV SW-101A FA3015 Boron inj tk disch MOV 1867C FA3015 RAD MON CAB 1-1/1-2, 1PH 10 KVA TRANS FA3050 Spare FA3070 Comp cool ht exh inlet MOV SW-102A FA3015 Chilled water outlet MOV PG-107A FA3040 Chrg PP saf inj MOV 1869A FA3040 Cont/rly rm AC cond PP 1-VS-P-1A FA3050 R

A/C fdr 1-VS-AC-1 FA3040 R

A/C fdr 1-VS-AC-7 FA3040 R

Spare FA3040 Spare FA3040 UPS 1A-1 UPS 1A-1 JA3150 R

AC chiller PP 1-VS-P-2A FA3050 R

Ctrl/rly rm wt chll 1-VS-E-4A JA3175 R

Spare HFB3070 UPS 1A-2 bypass 1A-2 HFB3100 R

CR)

NORMALLY ATTACHMENT MCC 1H11 ENERGIZED CE),

DE-ENERGIZED (D),

I NT ERM I TT ANT Cl )

E E

D E

E D

E D

D E

D D

D E

E E

E E

E E

I I

i I

I I

I

BREAKER SC SD SE-1 SE-2 6A 68 6C 6D 7A 78 7C 7D BA 88-1

• 88-2*

BC SURRY POWER STATION UNIT MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFRSO APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I I *-

I I

I I

LOAD Chg PP cool Wt PP Erner Gen Fdr PP Fdr 25KVA trf ht cab Ht trace cab #1 Oup cond PP saf area Cond inlet Recirc spry ht exch Rel rm emer supp fan Cond outlet Rec spr ht exch Cond inlet seal oil bkup pp Cond circ wt outlet Fdr 15KVA trf ht cab #5 CONTROL ROOM LTG Turning gear oil PP EQUIP. ID 1-CC-P-2A 1-EE-P-1A HTP-2A3 1-HS-P-38 MOV CW-106C MOV SW-103A 1-VS-F-42 MOV CW-100D MOV SW-103D MOV CW-106A MOV CW-1008 15 KVA TRANS LP 1C1 EXIST.

BKR.

FA3040 FA3015 FA3070 FA3070 FA3040 FA3020 FA3015 FA3015 FA3020 FB3015 FA3020 FA3050 FA3020 FA3070 FA3070 JA3125 REQUIRED APPENDIX R (R)

R R

R R

ATTACHMENT MCC 1 H11 NORMALLY ENERGIZED CE),

DE-ENERGIZED (D),

INTERMITTANT (I)

E E

E D

D D

D D

D E

D E

E E

BREAKER 1A 1B 1C 1D 2A 2B 2C 2D 3A 3B 3C

• 3D*

4A 4B 4C 4D SA SB Sc SD 6A 6B 6C 6D 7A SURRY POWER STATION UNIT 1 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I *-

I LOAD EQUIP. ID EXIST.

REQUIRED I

BKR.

APPENDIX R I

I I

Aux fd wtr cross tie MOV FW260A FA3015 R

Lo hd saf inj suet MOV 1860A FA3015 PP refuel wtr star tk MOV LCV1115B FA3015 Chrg pp aux oil pp 1 CH P 1A FA301S Caustic isol vlv MOV CS103A FA3015 Chrg pp recir line MOV 127SA FA301S Chrg pp set vol cont tk MOV LCV1115C FA3015 Cont vac pp 1 CV P 1A FA301S Caustic isol vlv MOV CS-103C MCP31SO Lo hd saf inj rwst MOV 1862A FA301S Chrg pp recirc line MOV 127SC FA3015 Cont/Relay Rm Vent MOD-VS-104B FA301S Saf area sump pp 1 DA P 1A FA301S Alt ht hd cld leg MOV 1842 FA301S Chrg pp rep seal stp MOV 1370 FA3015 REC SPRY PP MOT HTR 1PH RS P 1A FA3030 CON SPRY PP MOT HTR 1PH cs p 1A FA3030 Saf inj ace disch MOV 186SA FA3040 Chrg line stop MOV 1289A FA3015 Safe area exh fan VS F 40A FA3030 LHSI PP HTR 1PH SI P 1A FA3030 Out rec spry pp suet MOV RS 1SSA FA301S LH si disch to chrg pp MOV 1863A FA301S REC SPR PP MOT HTR 1 PH RS P 2A FA3030 Boric acid htr CHE 6A FA3040 CR)

NORMALLY ENERGIZED ATTACHMENT MCC 1H12N CE),

DE-ENERGIZED (D)

• INTERMITTANT Cl)

D D

D E

D D

D D

D D

E D

D E

E D

D E

E D

D E

I I

i I

I I

I

BREAKER

• 7B*

• 7C*

7D 8A

• 8B*

• 8C*

8D1 802 9A 9B 9C 90 10A 10B 10C 11A-1 11A-2 11B 11C SURRY POWER STATION UNIT 1 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I --

1 I

I I

I LOAD Rec spry ht exch inl Rec spry ht exch outl Boric acid htr Lo hd saf inj Rec spry ht exch inl Rec spry ht exch outl SWGR BUS 1J HTR FDR lncore inst drive "D" Lo hd saf inj Rec spry cl cross conn Out rec spr pp dis Rad man samp pp Lo hd saf inj disch Cont rm_Exh air damp Erner make up pp H2A tap box 1 Heat tracing cab Cont rod cool fan Cont rod cool fan EQUIP. ID MOV SW 104A MOV SW 105A 1 CHE 6B MOV 1890A MOV SW 104C MOV SW 105C 15 KVA TRANS MOV 1890C MOV SW 106A MOV RS 156A 1 SW P SC MOV 1864A vs 1030 FW P 4A HTP-2A2 VS F60A VS F 60F EXIST.

BKR.

FA3015 FA3015 FA3040 FA3015 FA3015 FA3015 FA3100 FA3100 FA3015 FA3015 FA3030 FA3040 FA3015 FA3015 FA3100 FA3070 FA3100 JA3125 JA3125 REQUIRED APPENDIX R (R)

A TT ACHMEN*T MCC 1H12N NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

I NT ERM ITTANT ( I )

D D

D D

D E

E 0

0 D

0 E

0 E

E E

BREAKER 1A 1B 1C 1D 2A 2B 2C 2D 3A 38 3C 3D 4A 4B 4C 4D SA SB SC 5D-1 5D-2 6A 68 6C 60 SURRY POWER STATION UNIT 1 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A LOAD Cont spry pp disc Aux st gen fd pp Res ht rem outlet Aux st gen fd mtr htr Lo hd saf inj rec Cont spry pp dis Aux st gen fd pp UPS 1A-2 Lo hd saf inj rec Cont spr pp suet Aux st gen fd pp Rad mon samp pp Chrg pp suet Ref w chm add tk disc Rep bypass Cont/rel room filt Chrg pp disch Rep bypass Chrg pp to boron tk 480 V pwr recp fdr Aux bldg elev fdr Press release Chrg pp disch Cont/rel rm vent Hydrogen recomb A EQUIP. ID MOV CS 101A MOV FW 151A MOV 1720A 1 FW P 3B MOV 1885A MOV CS 101C MOV FW 151E MOV 1885C MOV CS100A MOV FW 151C 1 SW P SA MOV 1270A MOV CS 102A MOV 1585 1 VS S 1A MOV 1286A MOV 1587 MOV 1287A MOV 1535 MOV 1286C MOV VS104A SW 1H1 264 EXIST.

BKR.

FA3015 FA3015 FA3040 FA3030 FA3015 FA3015 F.A3015 JA3150 FA3015 FA3015 FA3015 FA3040 FA3015 FA3015 FA3015 FA3040 FB3015 FA3015 FA3015 FA3100 FA3100 FA3015 FA3015 FA3015 JA3125 REQUIRED APPENDIX R (R)

R ATTACHMENT MCC 1H12S NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (!)

D D

D E

D D

D E

D D

D D

D D

E D

D D

D E

D D

D D

BREAKER 7A 7B 7C 7D 8A 8B 8C 80 9A 9B 9C 10A 10B 10C-1 10C-2 11 11A 11 B 11C SURRY POWER STATION UNIT 1 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I I --

1 LOAD I

I I

I Chrg pp suet Chrg pp rec line Boric acid filt to pp Future Cont rm isol Chrg pp suet Res ht rem inlet Future POST ACCID PURGE BLOWER Rep outlet stop Rep inlet stop Boric acid trans pp Aux bldg fltr ex fan Fdr ht trace cab UPS 1A-1 bypass Main feeder Erner gen oil pp Rep outlet stop Rep inlet stop EQUIP. ID MOV 1267A MOV 1275B MOV 1350 MOV VS103A MOV 1267B MOV 1700 1 GW C 3A MOV 1591 MOV 1590 CH P 2A VS F 9A HTP 2A1 1 EE P 1 D MOV 1595 MOV 1594 EXIST.

BKR.

FA3015 FA3040 FA3015 FA3015 FA3015 FA3015 FA3015 FA3030 FA3050 FA3050 FA3050 FA3100 HFB3100 HFB3100 FA3015 FA3050 FA3050 REQUIRED APPENDIX R (R)

R R

R R

ATTACHMENT MCC 1H12S NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (I)

D D

D D

D D

D D

D E

E E

E E

D D

BREAKER 1A 18 1C 2A1 2A2 28

• 2C*

2D 3A1 3A2 381 382

• 3C*

3D 4A 48 4C 4D

• SA*

58 SC SD SE 6A

• 68*

SURRY POWER STATION UNIT 1 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I *-

I I

I I

I I

LOAD Brg cool w ht exc inl Turn gear mot Spare Test equip recp fdr HEAT TRAC CAB #2 FDR 3P Space SPARE Comp cool ht exch inl RAD MON FDR 1PH A/C Feeder Lo press co2 refrg fdr TRANS FANS FDR RSS 3PH SPARE Chill w outlet Gen brg lift pp Chrg pp serv w pp Erner gen f.o. pp Chrg pp cool w pp SPARE Space UPS 181 Appx R pwr trans cab Dup cond pp safe area Cont/rel rm ac cond pp AC chil L w pp EQUIP. ID MOV SW 1018 MOV SW 1028 1-VS-AC-2 1A,1B,1C MOV PG 1078 1 SW P 108 EE P 1C 1 cc P 28 HS P 3A vs P 18 vs P 28 EXIST.

BKR.

FA3015 JA3125 FA3100 FA3070 FA3040 FA3020 FA3015 FA3030 FA3030 FA3070 FA3100 FA3020 FA3015 FA3020 FA3040 FA3015 FA3040 FA3020 HFB3150 JA3225 FA3015 FA3050 FA3050 REQUIRED APPENDIX R CR)

R R

R R

R R

R R

ATTACHMENT MCC 1J11 NORMALLY ENERGIZED (E),

DE-ENERGIZED (0),

INTERMITTANT Cl)

D E

D E

D E

E E

E D

E E

E E

E E

E

BREAKER

• 6C*

6D

"'6E*

• 7A*

78 7C 701 702 8A

• 88*

8c 8D1 8D2 9A 9B

• 9C*

90 SURRY POWER STATION UNIT 1 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I. -

I I

I I

I I

LOAD Cont/rel rm w chill Chrg pp aux oil pp SPARE SPARE Re seal w/ ret stop Rec spry ht exch SEMI VITAL BUS FDR UPS 18-2 bypass Rec spry ht exch Spare HHS! dis to cld leg A/C Fdr fdr 1PH HT TRAC CAB #4 FDR 3PH Chrg pp saf Spare Spare Future EQUIP. ID 1 VS E 48 1 CH P 1 B MOV 1381 MDV SW 103C MOV SW 1038 MDV 18670 1-VS-AC-6 MDV 18698 EXIST.

BKR.

JA3225 FA3015 FA3040 FA3020 FA3015 FA3015 HFB3100 HFB3100 FA3015 FA3015 FA3015 FA3070 FA3070 FA3015 FA3015 REQUIRED APPENDIX R (R)

R R

R R

ATTACHMENT MCC 1 J 11 NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (I)

E E

D D

E E

D D

E E

D

I I I BREAKER I

I I

I 1A1 1A2 18 1C 1D 2A 28 2C 3A 38 3C 3D 3E 4A 48 4C 4D SA 58 SC SD 6A 68

• 6C*

6D SURRY POWER STATION UNIT 1 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A LOAD H2A tap box 2 Spare Saf inj ace tk disch Safe inj ace tk disch Spare Inst air comprss Lo hd saf inj suet Chg pp suet vol cont tk Space Cont vac pp CONT SPR PP MOT HTR 1PH Safe area sump pp St gen aux fd mot ht Aux fd wtr cross tie Lo hd saf inj pp recirc Caustic 250 vlv REC SPR PP MOT HTR 1PH Chrg pp suet rwst Lo hd saf inj suet Chrg line stop Safe area exh fan Outs rec spr pp suet Lo hd.saf inj disch Rec spr ht exc inl Hydro recomb B EQUIP. ID MOV 18658 MOV 1865C 1 IA C 1 MOV 18628 MOV LCV 1115E CV P 18 cs P 18 DA P 18 1 FW P 3A MOV FW 2608 MOV 1885D MOV CS103B 1 RS P 18 MOV LCV 1115D MOV 18608 MOV 12898 1 VS F 408 MOV RS 155B MOV 18648 MOV SW 1048 EXIST.

BKR.

FA3070 FA3030 FA3070 FA3070 FA3050 JA3175 FB3015 FA3015 FA3015 FA3015 FA3050 FA3015 FA3050 FA3015 FA3015 FA3015 FA3050 FA3015 FA3015 FA3015 FA3030 FA3015 FA3015 FA3015 JA3125 REQUIRED APPENDIX R CR)

R R

ATTACHMENT MCC 1J12E NORMALLY ENERGIZED CE),

DE-ENERGIZED CD),

I NT ERM ITT ANT CI )

D D

D E

D D

E E

D D

D E

D D

D E

D D

D D

BREAKER

• 7A*

7B

• 7C*

7D

• BA*

BB BC BD 9A 9B 9C 9D1 9D2 10A 10B 10C SURRY PO\\.IER STATION UNIT 1 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFRSO APPENDIX R REPORT, CHAPTER 9, APPENDIX A I I --

1 LOAD I

I I

I Rec spr ht exc outl Rad mon samp pp Rec spr htr ex inl LHSI MOT HTR 1PH Rec spr ht ex outl Lo hd saf inj loop Rec spry cool crss conn REC SPR PP MOT HTR 1PH Outs rec spr pp disch LH saf inj disch Boric acid tk htr 4KV swgr Bus H htr fqr Incor inst for drive E Resid ht rmvl outl Res ht rem inlet Cont rod cool fan EQUIP. ID MOV S\\.I 105B 1 S\\.I P SD MOV S\\.I 104D 1 SI P 1B MOV S\\.I 105D MOV 1B90B MOV S\\.1106B 1 RS P 2B MOV RS 156B MOV 1863B 1 CHE 6C MOV 1720B MOV 1701 1 VS F 60C EXIST.

BKR.

FA3015 FA3030 FB3015 FA3050 FA3015 FA3030 F.A3015 FA3050 FA3015 FA3015 FA3050 FA3070 FA3040 FA3015 FA3015 JA3125 REQUIRED APPENDIX R CR)

NORMALLY ATTACHMENT MCC 1J12E EN ERG I ZED CE),

DE-ENERGIZED (D),

I NT ERM ITTANT CI )

D D

E D

D D

E D

D E

E D

D E

BREAKER 1A 1B 1C 1D1

• 1D2*

2A 2B 2C 2D 3A 3B 3C 3D 4A 4B 4C 4D1 4D2 SA SB SC 6A 6B 6C 7A

---

~-----

SURRY POWER STATION UNIT MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFRSO APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I *-

I I

I I

I

• LOAD Caus isol vlv Aux st gen fd pp w htr Chrg pp suet Personnel hatch fdr Air dryer Chem tank disch Aux st gen fd pp wt htr Chrg pp suet Chrg pp aux oil pp Cont spry fd suet Aux st gen fd pp wt htr Chrg pp suet Spare Cont spry pp disch React cool pp Bypass Chrg pp disch UPS 1B-1 bypass Spare Cont spry 'pp disc Chrg pp disch React cool pp inl stop Rad man sample pp Erner make up PP React cool pp outl stp Chrg pp disch EQUIP. ID MOV CS 103D MOV FW 151D MOV 1269A 1 IA D MOV CS102B MOV FW 151B MOV 1269B 1 CH P 1C MOV CS 100B MOV FW 151F MOV 1270B MOV CS 101D MOV 1586 MOV 1286B MOV CS 101B MOV 1287B MOV 1592 SW P SB FW P 4B MOV 1593 MOV 1287C EXIST.

BKR.

FB3015 FA3015 FA3015 FA3015 FA3100 FA3015 FA3015 FA3015 FA3015 FA3015 FA3015 FB3015 FA3015 FA3015 FA3015 HFB3100 HFB3070 FA3015 FB3030 FA3050 FA3040 FA3100 FA3050 FA3015 REQUIRED APPENDIX R (R)

R ATTACHMENT MCC 1J12W NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (I)

D D

D D

E D

D D

E D

D D

D D

D E

D D

D D

D

BREAKER 7B 7C 7D 8A 8B ac 9A 9B 9C 10A 10B 10C SURRY POWER STATION UNIT MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFRSO APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I I --

1 I

I I

Spare LOAD Chrg pp recirc line Future Press relief isol Lo hd saf inj recirc Cont rod cool fan Cont rm isol POST-ACCID PURGE BLOWER Safe supp ht vent unit UPS 1B-2 Boric acid transf Aux bldg fil by exh fan EQUIP. ID MDV 1373 MDV 1536 MDV 1885B 1 VS F 60D MOD VS 103B GW C 3B VS HV 4 1 CH P 2B 1 VS F 9B EXIST.

BKR.

FA3015 FA3015 FA3015 FA3015 JA3125 FA3030 FA3030 FA3050 JA3150 FA3050 FA3100 REQUIRED APPENDIX R CR)

R R

ATTACHMENT MCC 1J12W NORMALLY ENERGIZED CE),

DE-ENERGIZED CD),

INTERMITTANT CI)

D D

D E

E D

E E

BREAKER 1A1 1A2 18 1C 10 1E1 1E2 2A-1 2A-2 28 2C 201 202 3A 38 3C 30 4A1 4A2 481 4B2 4C 40

• SA*

SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFRSO APPENDIX R REPORT, CHAPTER 9, APPENDIX A LOAD EQUIP. ID Mn fdr bkr 24H16 Ht trace cab #11 Lighting LP2C1 Chrg pp wtr pp 2 CC P 2A Cont rm supp fan 2 VS F 41 Chrg pp/serv wtr pp 2 SW P 10A Comm VHF repeat 480 V PWR RECPT Semi-vital Bus (alt) 2SVB1 spare Brg cool ht ex inl MOV SW 201A HHSI dis cld Leg MOV 2867C Rad man cab2-1 & 2-2 Spare Sv wtr pp sue vlv MOV SW 202A Chill wtr out MOV PG 107C UPS 2A-1 Cont/rel ac pp 1 VS P 1C Spare Spare A/C fdr 2 VS AC6 A/C fdr 2 VS ACS EMER BACK-UP APP R AC chill pp 1 VS P 2C Cont/rel rm wtr chill 1 VS E 4C EXIST.

BKR.

FA3070 FA3070 FA3040 FA3015 FA3040 FA3015 FA3100 HFC3070 FA3015 FA3015 FA3040 FA3040 FB3015 FA3040 JA3150 FA3050 FA3040 FA3040 FA3040 FA3040 JA3225 FA3050A JA3175A REQUIRED APPENDIX R (R)

R R

R R

R R

R R

R R

R R

R ATTACHMENT MCC 2H11 NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (I)

E E

E E

D E

E D

E NA D

D E

NA D

D E

E NA NA E

E E

E E

BREAKER 581 582 SC SD SE 6A 68 6C 6D 7A 78 7C 7D 8A 88 ac SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I I --

1 LOAD I

I I

I SPARE UPS 2A-2 bypass Erner gen rm fdr #2 Erner gen f.o. pp Cont/rel rm filt Dup cond pp safe area Cond cir w inl Rec spr ht exch Rel rm emer supp fan Cond cir wt outl Recir spry ht exch cond cir wt inl Turb seal oil bk pp Cond cir wt outl Chrg pp saf inj Turn gear oil pp EQUIP. ID 2A2 2H1-1A EE P 18 vs s 18 2 HS P 38 MOV CI.J 206C MOV SW 203A 2 VS F 42 MOV CI.J 200D MOV SW 203D MOV CW 206A MOV CI.J 2008 MOV 2869A 2TGP EXIST.

BKR.

HFB3070 HFB3100 JA3175 FA3015 FA3040 FA3015 FA3020 FA3015 FA3015 FA3020 FA3015 FA3020 FA3050 FA3020 FA3040 FA3100 REQUIRED APPENDIX R CR)

R R

ATTACHMENT MCC 2H11 NORMALLY ENERGIZED CE),

DE-ENERGIZED CD),

INTERMITTANT Cl)

NA E

E E

D D

D D

D D

D D

E

BREAKER 1A 18 1C 1D 2A 28 2C 2D 3A 38 3C

• 3D 4A 48 4C 4D SA 58 SC SD 6A 68 6C 6D 7A

--~~------------

SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I I *-

I LOAD EQUIP. ID I

I I

I Chrg pp recir stop MOV 2275A Lo hd saf suet MOV 2860A Chrg pp sue rwst MOV LCV2115B Chrg pp aux oil pp 2 CH P 1A AUX S G FD PP MOT HT 1PH 2 FW P 38 Rad mon samp pp 2 SW P SA Chrg pp suet vol cnt tk LCV 2115C Cont vac pp 2 CV P 1A Erner gen oil pp 2 EE P 1E Aux fd wtr cross tie MOV FW160A Chrg pp rec Line MOV 2275C Spare Safe area samp pp 2 DA P 1A Alt high hd MOV 2892 Chrg pp rec stop MOV 2370 REC SPRY MOT HTR 1PH 2 RS P 1A CONT SPR PP MOT HTR 1PH 2 CS P 1A Saf inj ace disch MOV 2865A Chrg Line stop MOV 2289A Saf area exh fan 2 VS F 40A Lo hd saf inj mot htr 2 SI P 1A Out recir spr pp MOV RS 255A Chrg pp suet MOV 2863A Recir spr pp mot htr 2 RS P 2A Boric acid tk htr 2 CHE 6A EXIST.

BKR.

FA3015 FA3015 FA3015 FA3015 FA3050 FA3040 FA3015 FA301-5 FA3015 FA3015 FA3015 FA3015 FA3015 FB3015 FA3050 FA3050 HFA3040 FA3015 FA3030 FA3050 FB3015 FA3015 FA3050 FA3050 REQUIRED APPENDIX R (R)

R R

ATTACHMENT 1 MCC 2H12N NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (I)

D D

D E

E D

D D

NA D

D E

E D

D E

E D

D E

BREAKER

• 7B*

• 7C*

7D 8A

• 8B*

• BC*

8D1 8D2 9A 9B 9C 9D 10A

• 10B*

10C 11A 11 B1 11B2 11 C SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I I *-

I I

I I

I LOAD Recir spry ht ex inl Recir spr ht ex out BORIC ACID TK HTR Lo hd saf inj lpa Recir spry ht ex in Rec spr ht exch out 4 KV SWGR BUS 2J 1PH Incore inst drive D Lo hd safe inj EQUIP. ID MOV SW 204A MOV SW 205A 2 CHE 6C MOV 2890A MOV SW 204C MOV SW 205C MOV 2890C Rec spr ht cool lrgs connMOV SW 205A Outs recir spr disch MOV RS 256A Rad mon samp pp 2 SW P SC Lo hd safe inj disch MOV 2864A Cont/Rly Rm Vent MOD-VS-204B Erner make up pp 2 FW P 4A Cont rod cool fan 2 VS F 60A H2A tap box Spare Cont rod cool fan 2 VS F 60F EXIST.

BKR.

FA3015 FA3015 FA3050 FA3040 FA3015 FA3015 FA3100 FB3040 FA3040 FA3040 FA3015 FA3040 FA3015 FA3015 FA3100 JA3125 FA3070 FB3030 JA3125 REQUIRED APPENDIX R (R)

ATTACHMENT MCC 2H12N NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (I)

D D

D D

D E

E D

D D

D E

E D

NA E

BREAKER 1A

• 1B*

1C 1D 2A 2B

• 2C*

2D 3A 38

• 3C*

3D-1 3D-2 4A 48 4C 4D SA SB SC 501 5D2 6A 68 6C SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I I --

1 I

I I

LOAD Cont spry pp disch Aux stm gen fd pp Resid ht rmvl UPS 1A-2 Lo hd saf inj Cont spr pp disch Aux stm gen fd pp Spare Lo hd saf inj Cont spr pp suet Aux stm gen fd pp UPS 2A-1 bypass Space Chrg pp suet Ref wtr chem add tk RCP bypass Spare Chrg pp disch RCP bypass Chrg pp disch 480 V pwr recpt fdr h2 recomb Press relief Chrg pp disch Cont/rel rm vent EQUIP. ID MOV CS 201A MOV FW 251A MOV 2720A MOV 2885A MOV CS 201C MOV FW 251E MOV 2885C MOV CS 200A MOV Fl./ 251C MOV 2270A MOV CS 202A MOV 2585 MOV 2286A MOV 2587 MOV 2287A MOV 2535 MOV 2286C MOV VS 204A EXIST.

BKR.

FA3015 FA3015 FA3040 JA3150 FA3015 FA3015 FA3015 FA3015 FA3015 FA3015 HFB3100 HFB3070 FA3015 FA3015 FA3015 FA3015 FA3015 FA3015 FA3100 FA3100 FA3015 FA3015 FA3015 REQUIRED APPENDIX R (R)

R R

ATTACHMENT MCC 2H12S NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (I)

D D

D E

D D

D NA D

D D

E NA D

D D

NA D

D D

D D

D D

D

BREAKER 6D 7A 7B 7C 7D 8A 8B 8C BD 9A 9B 9C 10A 10B

- 10C 11A 11 B 11 C SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I I *-

I LOAD I

I I

I Future Chrg pp suet Chrg pp rec Line Boric acid fl tr Future Lo hd saf inj Chrg pp suet Future Resid ht rmvl POST ACCID PURGE BLOWER Rep outlet stop Rep inl stop Boric acid trnsfr pp caustic isol vlv Caus isol vlv future Rep outl stop Rep inl stop EQUIP. ID MOV 2267A MOV 2275B MOV 2350 MOV 2862A MOV 2267B MOV 2700 2 GIJ C 3A MOV 2591 MOV 2590 2 CH P 2C MOV CS 203A MOV CS 203C MOV 2595 MOV 2594 EXIST.

BKR.

FA3015 FA3015 FA3015 FA3015 FA3015 FB3030 FA3030 FA3050 FA3050 FA3050 FB3015 MCP3150 FA3050 FA3050 REQUIRED APPENDIX R CR)

ATTACHMENT MCC 2H12S NORMALLY ENERGIZED CE),

DE-ENERGIZED CD),

I NT ERM ITT ANT CI )

NA D

D D

NA D

D NA D

D D

D D

D NA D

D

BREAKER 1A 18 1C-1 1C-2 2A

• 28*

2C 3A-1 3A-2

• 38*

• 3C*

3D

• 4A-1*

4A-2

• 48*

4C 4D 4E

• SA*

58-2 SB-1 SC SD 6A 68-1 SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFRSO APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I I --

1 I

I I

LOAD Brg cool w ht exch Turn gear motor inl Process vent rad mon Vent rad mon Inst air comprss SPARE

_sv wt r pp suet vv RAD MON FDR CAB 1PH A/C Feeder Spare SPARE Cont rm air iso dmpr Inst air dryer RES SS TRANS FDR 3PH Spare Auto xfr SW Erner gen f.o. pp Chrg pp cool w pp SPARE Spare UPS 28-2 bypass UPS 28-1 Dup cond pp safe area Turb brg lift pp Transformer EQUIP. ID MOV SW 2018 RM GW 130 1&2 RM VG 131 1&2 2 IA C 1 MOV SW 2028 2-VS-AC-9 1 VS 103C 2 IA D EDG3 ABT 1 EE P 1F 2 cc P 28 28-2 28-1 2 HS P3 A HT T 281 EXIST.

BKR.

FA3015 FA3100 FA3030 FA3030 JA3175 FA3015 FA3015 FA3030 FA3030 FA3070 FA3020 FA3015 FA3100 FA3100 FA3020 JA3175 FA3015 FA3040 FA3020 HFB3070 HFC3100 JA3150 FA3015 FA3020 FA3100 REQUIRED APPENDIX R (R)

R R

R R

R R

ATTACHMENT MCC 2J11 NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (I)

D E

E E

E NA D

E E

NA NA E

E E

NA E

E NA NA E

E E

E

BREAKER 6B-2 6C 6D

• 7A*

7B 7C 70-1 70-2 8A

• 8B*

BC 8D 9A

• 9B*

• 9C*

• 9D*

SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFRSO APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I *-

I I

I I

I LOAD A/C Feeder Chrg pp aux oil pp Chrg pp serv w pp SPARE Re seal w/ ret stop Rec spr ht exch SEMI VITAL BUS 1PH Spare Rec spr ht exch CN/RLY RM AC COND PP BU Disch to cold leg Future Chrg pp saf inj stop CN/RLY RM W CHILLER BU CHILLED WTR OUTLET BKUP A/C CHIL WPP BKUP EQUIP. ID 2-VS-AC-7 2 CH P 1B 2 SW P 10B MOV 2381 MOV SW 203C 2SVB1 MOV SW 203B 1-VS-P-1B MOV 28670 MOV 2869B 1-VS-E-4A/B MOV PG 107B 1-VS-P-2B EXIST.

BKR.

FA3040 FA3015 FA3040 FA3020 FA3015 FA3015 FA3100 FA3100 FB3015 FA3050 FA3015 FA3015 JA3175 FA3015 FA3050 REQUIRED APPENDIX R (R)

R R

R R

ATTACHMENT 1 MCC 2J11 NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

I NT ERM ITTANT (I)

E E

E NA D

D E

NA D

E D

NA D

E D

E

BREAKER 1A 18 1C 1D 2A 28 2C 2D 3A1 3A2 38 3C 3D 3E 4A 48 4C 4D SA SB SC SD 6A 68

• 6C*

SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFRSO APPENDIX R REPORT, CHAPTER 9, APPENDIX A I I *-

I I

I I

I Spare Safe inj Spare Spare Future LOAD accum tk POST ACCID PURGE BLOWER Rad man samp pp Erner make up pp Spare HEAT TRACING CAB 10 3PH Cont vac pp Cont spr pp mot htr Safe area samp pp AUX S G FD PP HTR 1PH Lo hd saf inj Lo hd saf inj rec vlv AUX FD WTR CROSS TIE REC SPR PP MTR HTR Chrg pp suet Lo hd saf inj suet Chrg line stop Safe area exh fan Out rec spr pp Lo hd saf inj Rec spr ht exch inl EQUIP. ID MOV 28658 2 GW C 38 2 SW P SB 2 FW P 48 2 CV P 18 2 cs P 18 2 DA P 18 2 FW P 3A MOV 28628 MOV 2885D MOV FW160B 2 RS P 18 MOV LCV 2115D MOV 28608 MOV 22898 2 VS F 408 MOV RS 2558 MOV 28648 MOV SW 2048 EXIST.

BKR.

FA3030 FA3030 FA3060 JA3175 FA3030 FA3040 FA3100 FA3100 FA3015 FA3050 FA3015 FA3050 FA3015 FA3015 FA3015 FA3050 FA3015 FA3015 FA3015 FA3030 FB3015 FA3015 FA3015 REQUIRED APPENDIX R CR)

R R

ATTACHMENT MCC 2J12E NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT CI)

NA D

NA NA NA D

NA E

E E

D D

D E

D D

D E

D D

D

BREAKER 6D

• 7A*

7B

• 7C*

7D

• BA*

BB BC 80 9A 98 9C 9D1 9D2 10A 10B 10C 10D1 1002 SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A LOAD Hydro recomb B Rec spr ht exch outl Caustic iso vlv Recirc spr ht exch inl lo hd saf inj mot htr Recir spr ht exch outl Lo hd saf inj loop Rec spr cool cross conn Rec spr pp mtr htr Out rec spr pp Lo hd st disc to chg pp Spare 4KV SWGR HTR FDR 1 PH Incore inst drive Res ht rem out isol Res ht rem out isol BORIC ACID TK HTR 3PH TRANSFORMER 1PH UPS 2B-1 bypass EQUIP. ID MOV SW 205B MOV CS 2038 MDV SW 204D 2 SI P 1B MDV SW 205D MDV 2890B MDV SW 206 B 2 RS P 2B MOV RS 256B MOV 2863B 2 IC 1E MOV 2701 MDV 2720B 2 CHE 68 HT T 2B3 EXIST.

BKR.

MAG FA3015 FA3015 FA3015 FA3050 FA3015 FA3030 FA3015 FA3050 FA3030 FB3015 FA3070 FA3040 FA3030 FA3040 FA3050 HFC3070 HFB3100 REQUIRED APPENDIX R (R)

R ATTACHMENT MCC 2J12E NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

I NT ERM IT TANT ( I )

D D

D D

E D

D D

E D

D NA E

E D

D E

E E

BREAKER 1A

• 1B*

1C 1D1 1D2 2A

• 2B*

2C 2D 3A

• 3B*

3C 30 4A 48 4C 40 SA SB SC 6A 68 6C 7A 78 SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFRSO APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I --

1 I

I I

I Spare LOAD Aux stm gen fd pp Chrg pp suet H2A tap box 2 Personnel hatch Chem add tk disch Aux stm gen fd pp Chrg pp suet Chrg pp aux oil pp Cont spr pp suet Aux stm gen fd pp Chrg pp suet Spare Cont spr pp disch Reactor cool pp bypas Chrg pp disch Rad mon samp pp Cont spr pp disch Chrg pp disch React cool pp inl stp Future cont rod cool fan React cool pp outl stp Chrg pp disch Spare EQUIP. ID MOV FW 251D MOV 2269A MOV CS 202B MOV FW 251B MOV 2269B 2 CH P1C MOV CS 200 B MOV FW 251F MOV 2270B MOV CS 2010 MOV 2586 MOV 22868 1 SW P SD MOV CS 2018 MOV 2287B MOV 2592 2 VS F 60C MOV 2593 MOV 2287C EXIST.

BKR.

FA3015 FA3015 FA3070 FA3020 FA3015 FA3015 FA3015 FA3015 FA3015 FA3015 FA3015 FA3015 FA3015 FA3015 FA3040 FB3015 FB3015 FA3050 JA3125 FA3050 FA3015 FA3015 REQUIRED APPENDIX R (R)

ATTACHMENT MCC 2J12W NORMALLY ENERGIZED (E),

DE-ENERGIZED (D),

INTERMITTANT (I)

NA D

D D

D D

D D

E D

D D

NA D

D D

D D

D NA E

D D

NA

BREAKER 7C 7D BA BB BC 9A 98 9C 10A 108 10C1 10C2 SURRY POWER STATION UNIT 2 MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A I

I -

I I

I I

I LOAD Chrg p rec stop UPS 2B-2 Press relief isol Lo hd saf inj recirc Cont rod cool fan Safe inj ace tk disc Caustic isol vlv Saf supp htr/vent Boric acid trans pp Chg pp suet vol cont TRANSFORMER 1PH Spare tk EQUIP. ID MOV 2373 MOV 2536 MOV 2BB5B 2 VS F60D MOV 2B65C MOV CS 203D 2 VS HV 4 2 CH P 20 MOV LCV 2115E HT T 2B2 EXIST.

BKR.

FA3015 JA3150 FB3015 FA3015 JA3125 FA3030

• FB3015 FA3050 FA3050 FA3015 FB3030L FB3100L REQUIRED APPENDIX R CR)

R ATTACHMENT MCC 2J12W NORMALLY ENERGIZED CE),

DE-ENERGIZED CD),

INTERMITTANT CI)

D E

D D

E D

D E

D E

NA

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11448-FE-11AA-10 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A SPARE 2

15A SPARE 3

15A SPARE 4

15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A 1VB24 VERT BO REAR PNL 5

12 15A 1VB28 VERT BO SECT 1-2 YES 5

13 15A 1VB32 VERT BO SECT 1-1 5

14 15A 1VB57 VERT BO SECT 1-1 5

15 15A 1VB100 VERT BO SECT 1-1 5

16 20A 1VB126 VERT BO SECT 1-1 5

17 15A 1VB171 N.I.S. PNL 1 5

18 15A 1VB170 N.I.S. PNL 1 5

19 15A 1VB180 VNTX-R (AUX VENT PNL) 5 1VB902 2-DIP-ESRH YES 4

20 15A SPARE 21 15A 1VB206 M. B. RACK #1 TB 9 3

22 20A SPARE 23 15A 1VB220 VENT PNL UNIT #1 5

24 20A 1VB237 R.M.T. LOGIC CAB A TB 10 3

25 15A 1VB208 CHRRM PNL 5

26 15A 1VB173 BORIC ACID FLATS 17 27 15A 1VB362 VERT. BD SECT.1-1 5

1VB793 PAMR-1(POST ACCIDENT MON. RED) 5 28 15A 1VB225 S.I.A. RACK COMPT VI TB6AA 3

29 15A 1VB161 BENCH BD SECT 1-I 5

1VB801 PAMC-1(POST ACCID MON CNT PNL) 5 30 15A 1VB166 VERT BD REAR PNL 5

1VB805 PAMC-1(POST ACCID MON CNT PNL) 5 31 15A 1VB178 RCP V 9C/1 1

32 15A 1VB178 RCP V 9C/1 33 15A 1VB178 RCP V 9C/1 34 15A 1VB235 VITAL BUS FUSE BOX FB-1 35 100A 1VB912 MAIN FEED FROM UPS 1A-1 YES 3

ATTACHMENT 2 BUS VB 1-1 FIRE AREA NO. 5

L SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAYLTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11448-FE-11AF-4 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A 1VBS1 MAIN BO RACK NO. 1, TB-1 3

2 15A 1VBS102 JB-ICC-2 5

3 15A 1VBS110 ICC MP PNL TRAIN A/B, Pl 5

4 15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 l5A SPARE 14 15A SPARE 15 15A SPARE 16 15A SPARE 17 15A SPARE 18 15A SPARE 19 15A SPARE 20 15A SPARE 21 15A SPARE 22 15A SPARE 23 15A 1VBS40 PROCESS RACK NO.

3 24 15A 1VBS45 PROCESS RACK NO. 3 3

25 15A 1VBS41 PROCESS RACK NO. 1 3

26 15A 1VBS46 PROCESS RACK NO. 6 3

27 15A 1VBS42 PROCESS RACK NO. 2 3

28 15A 1VBS47 PROCESS RACK NO. 6 3

29 15A 1VBS43 PROCESS RACK NO. 2 3

30 15A 1VBS48 PROCESS RACK NO. 7 3

31 15A 1VBS44 PROCESS RACK NO. 3 3

32 15A 1VBS49 PROCESS RACK NO. 7 3

33 100A 1VB904 MAIN FEED FROM UPS 1A-1 YES 3

ATTACHMENT 2 BUS VB 1-IA FIRE AREA NO. 3

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11448-FE-11AB-8 BRK SIZE CABLE DEST! NA TI ON APPENDIX R FIRE AREA CIRCUIT 15A SPARE 2

15A SPARE 3

15A SPARE 4

15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A SPARE 16 15A SPARE 17 15A 1VB281 VERT BD SECT 1-1 5

18 15A 1VB287 VERT BD SECT 1-2 5

19 15A 1VB296 VERT BD REAR PNL 5

20 15A 1VB310 VERT BD SECT 1-1 5

21 15A 1VB332 VERT BD SECT 1-1 5

22 15A 1VB361 M.B. RACK #2 TBS & 9 3

23 15A 1VB371 N.I.S. PNL #2 5

24 15A 1VB385 FLOOD MON PNL"A"VIA FUSEBOX II 5

25 15A 1VB372 N.I.S. PNL #2 5

26 15A SPARE 27 15A 1VB755 RCP VIBRATION DET PNL 5

28 15A 1VB392 SIB RACK COMP VI 3

29 15A 1VB285 XMTTER H2-A-GW-103 5

30 15A 1VB324 BENCH BD SECT 1-1 5

1VB777 (POST ACCID MON CNT PNL)PAMC-1 5

31 15A 1VB756 CHEM REC PNL VIA FUSE BOX II 32 15A 1VB328 VERT BD REAR PNL 5

1VB781

( POST ACC ID MON CNT PNL)PAMC-1 5

33 15A 1VB611 VNTX-R AUX VENT PNL 5

34 15A 1VB362 CHRRM PNL (CONT HI RANGE RAD.

5 1VB901 1-AMP-NM2 & 1-PRO-NM2 YES 3

(NFD-1270) GAMMAMETRICS CH-2 35 100A 1VB907 MAIN FEED FROM UPS 1B-1 YES 3

ATTACHMENT 2 BUS VB 1-II FIRE AREA NO. 5

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAYING 11448*FE-11AG-4 BRK SIZE CABLc DESTINATION APPENDIX R FIRE AREA CIRCUIT 1

15A 1VBS21 PROTECTION RACK N0.13, TB-6 3

2 15A 1VBS23 BENCHBOARD SECT 1-1, B17G 5

3 15A 1VBS27 1-DAS-1, TA 3

4 15A 1VBS28 1-DAS-1, TA 3

5 15A 1VBS29 1-DAS-1, TA 3

6 15A 1VBS30 PROCESS RACK N0.11, TB-6 3

7 15A 1VBS31 1-DAS-3, TBA 3

8 15A 1VBS101 I.C.C. M.P. PNL. TRAINA/BPI 5

9 15A 1VBS104 JB*ICC-1 5

10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A SPARE 16 15A SPARE 17 15A 1VBS68 PROCESS RACK NO. 5 TB-7 3

18 15A 1VBS76 PROCESS RACK N0.11 TB-7 3

19 15A 1VBS69 PROCESS RACK NO. 5 TB-8 3

20 15A 1VBS77 PROCESS RACK N0.11 TB-8 3

21 15A 1VBS70 PROCESS RACK NO. 8 TB-7 3

22 15A 1VBS78 PROCESS RACK N0.12 TB-7 YES 3

23 15A 1VBS71 PROCESS RACK NO. 8 TB-8 3

24 15A 1VBS79 PROCESS RACK N0.12 TB-8 3

25 15A 1VBS72 PROCESS RACK NO. 9 TB-7 3

26 15A 1VBS80 PROCESS RACK N0.13 TB-7 3

27 15A 1VBS73 PROCESS RACK NO. 9 TB-8 3

28 15A 1VBS81 PROCESS RACK N0.13 TB-8 3

29 15A 1VBS74 PROCESS RACK N0.10 TB-7 3

30 15A 1VBS82 PROCESS RACK N0.19 TB-7 YES 3

31 15A 1VBS75 PROCESS RACK N0.10 TB-8 3

32 15A 1VBS83 PROCESS RACK N0.19 TB-8 3

33 100A 1VB908 MAIN FEED FROM UPS 1B-1 YES 3

ATTACHMENT 2 BUS VB 1-IIA FIRE AREA NO. 3

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11448-FE-11AA-10 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A SPARE 2

15A SPARE 3

15A SPARE 4

15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A 1VB450 VERT BO REAR PNL 5

1VB451 JB NR V.C.T.

17 16 15A 1VB456 BENCH BO SECT 1-1 5

17 15A 1VB461 BENCH BO SECT 1-1 5

18 15A 1VB481 VERT BO SECT 1-1 5

19 15A 1VB468 TRAIN "A" RPS TEST RACK 5 3

20 15A 1VB521 N. I.S. PNL #3 5

21 15A 1VB505A AUX VENT PNL 5

22 15A 1VB536 M.B. RACL #3 TB-7, 8 & 9 YES 3

23 15A 1VB522 N. I.S. PNL #3 5

24 15A UNSCHED.

SEQ OF EVENTS RECORD VIA FBJIJ 5

25 15A 1VB540 VENT. PNL UNIT #2 YES 5

26 15A 1VB438 TB "A" NEAR AIR TEMP. MON PNL 5

1VB439 TRAIN "A" AMBIENT TEMP MON SYS 5

27 15A 1VB500 J.B. MECH EQUIP RM #1 31 28 15A 1VB543 RWST LVL XMTR HTR CONT. PNL B 3

29 15A 1VB560 VERT BO SECT 1-2 5

1VB769 PAMC-1(POST ACCID MON CNT PNL) 5 30 15A 1VB497 VITAL BUS FUSE BOX FB-111 1VB773 PAMC-1(POST ACCID MON CNT PNL) 5 31 FUT.

32 FUT.

33 15A SPARE 34 15A 1VB524 PAMC-1(POST ACCID MON CNT PNL) 5 35 100A 1VB905 MAIN FEED FROM UPS 1A-2 YES 3

ATTACHMENT 2 BUS VB 1-111 FIRE AREA NO. 5

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11448-FE-11AF-4 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A 1VBS6 PROTECTION RACK N0.23, TB-5 3

2 15A 1VBS8 BENCHBOARD SECT 1-1, B15D 5

3 15A 1VBS12 1-DAS-1, TA 3

4 15A 1VBS13 1-DAS-1, TA 3

5 15A 1VBS14 1-DAS-1, TA 3

6 15A 1VBS15 1-DAS-2 TBA 3

7 15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A SPARE 16 15A SPARE 17 15A 1VBS113 1-CW-PNL-1A 3

18 15A SPARE 19 15A 1VBS52 PROCESS RACK NO. 14 3

20 15A 1VBS59 PROCESS RACK NO. 17 3

21 15A 1VBS53 PROCESS RACK NO. 14 3

22 15A 1VBS60 PROCESS RACK NO. 18 3

23 15A 1VBS54 PROCESS RACK NO. 15 3

24 15A 1VBS61 PROCESS RACK NO. 18 3

25 15A 1VBS55 PROCESS RACK NO. 15 3

26 15A 1VBS62 PROCESS RACK NO. 20 YES 3

27 15A 1VBS56 PROCESS RACK NO. 16 YES 3

28 15A 1VBS63 PROCESS RACK NO. 20 3

29 15A 1VBS57 PROCESS RACK NO. 16 3

30 15A 1VBS64 PROCESS RACK NO. 23 3

31 15A 1VBS58 PROCESS RACK NO. 17 3

32 15A 1VBS65 PROCESS RACK NO. 23 3

33 100A 1VB906 MAIN FEED FROM UPS 1A-2 YES 3

ATTACHMENT 2 BUS VB 1-1 I IA FIRE AREA NO. 3

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11448-FE-11AB-8 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A SPARE 2

15A SPARE 3

15A SPARE 4

15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A 1VB601 VERT BD SECT 1-2 5

16 15A 1VB608 VERT BO SECT 1-1 5

17 15A 1VB641 VERT BO SECT 1-1 5

18 15A 1VB688 VERT BO SECT 1-1 5

19 15A 1VB715 N.I.S. PNL #4 5

20 15A 1VB717 RPS TEST RACK 5 (TRAIN B) 3 21 15A 1VB373 VERT BO SECT 1-1 5

22 15A 1VB530 (POST ACCID MON CNT PNL)PAMC-1 5

1VB737 RWST LEV TRNSMIT HTG CNT PNL A 3

23 15A 1VB741 M.B. RACK #4 TB-7, 8 & 9 3

24 15A 1VB660A JB-VB1 5

25 15A SPARE 26 15A SPARE 27 15A 1VB716 N. I.S. PNL 4 5

28 15A 1VB681 JB #2 MECH EQUIP ROOM #1 31 29 15A 1VB694 UNIT #2 VENT PNL 5

30 15A 1VB687 LOAD FREQ CONT PNL/FUSE BOX IV 5

31 15A 1VB760 JB SV1 - TV-SV-102A 32 15A 1VB594 JB NR BORIC ACID TK "C" 17 1VB785 (POST ACCID MON CNT PNL)PAMC-1 5

33 15A 1VB736 RMT LOGIC CAB 11B11 3

34 15A 1VB759 VERT BD SEC 1-1 5

1VB789 (POST ACCID MON CNT PNL)PAMC-1 5

35 100A 1VB909 MAI.N FEED FROM UPS 18-2 YES 3

ATTACHMENT 2 BUS VB 1-IV FIRE AREA NO. 5

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11448-FE-11AG-4 BRK SIZE CABLE" DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A 1VBS35 INSTRU RACK NO. 25, TD-4 3

2 15A SPARE 3

15A SPARE 4

15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A SPARE 16 15A SPARE 17 15A 1VBS116 1-CW-PNL-1B 3

18 15A 1VB933 ULTRASONIC RCS LEVEL 1VB936 ULTRASONIC RECORDER 5

19 15A 1VBS86 PROCESS RACK N0.21, TB-7 YES 3

20 15A 1VBS93

• PROCESS RACK N0.26, TB-8 3

21 15A 1VBS87 PROCESS RACK N0.21, TB-8 3

22 15A 1VBS94 PROCESS RACK N0.27, TB-7 3

23 15A 1VBS88 PROCESS RACK N0.22, TB-7 3

24 15A 1VBS95 PROCESS RACK N0.27, TB-8 3

25 15A 1VBS89 PROCESS RACK N0.22, TB-8 3

26 15A 1VBS96 PROCESS RACK N0.28, TB-7 3

27 15A 1VBS90 PROCESS RACK N0.25, TB-7 3

28 15A 1VBS97 PROCESS RACK N0.28, TB-8 3

29 15A 1VBS91 PROCESS RACK N0.25, TB-8 3

30 15A 1VBS98 PROCESS RACK N0.29, TB-7 3

31 15A 1VBS92 PROCESS RACK N0.26, TB-7 3

32 15A 1VBS99 PROCESS RACK N0.29, TB-8 3

33 100A 1VB910 MAIN FEED FROM UPS 1B-2 YES 3

ATTACHMENT 2 BUS VB 1-IVA FIRE AREA NO. 3

SURRY POYER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 1DCFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAYING 11548-FE-11AA-7 BRK SIZE CABLc DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A SPARE 2

15A SPARE 3

15A SPARE 4

15A SPARE s

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A 2VB24 MAIN CONTROL BD REAR PNL 5

12 15A 2VB28 MAIN CONTROL BD SECT 2-2 YES 5

13 15A 2VB32 MAIN CONTROL BD SECT 2-1 s

14 15A 2VB57 MAIN CONTROL BD SECT 2-1 5

15 15A 2VB100 MAIN CONTROL BD SECT 2-1 5

16 15A 2VB126 MAIN CONTROL BD SECT 2-1 5

17 20A SPARE 18 15A UNSCHED NIS REGULATING XFMR (PR!)

5 19 15A 2VB902 1-DIP-ESRH YES 3

20 15A 2VB171 NI S PNL - 1 s

21 15A 2VB206 M. B. RACK #1 TB-8 4

22 15A SPARE 23 15A 2VB212 CONT HI RNGE RAD MONITOR-CHRRM 5

24 15A 2VB182 VNTX-R (AUX VENT PNL) s 2VB236 RMT (RECIRC MODE TRANSFER) 4 25 15A SPARE 26 15A 2VB173 TIC-162 BORIC ACID TK A 17 TIC-103 BORIC ACID TK C 17 TIC-2-934A, 2-SI-TK-2 17 27 15A 2VB226 BENCH BD SECT 2-1 5

28 15A 2VB225 SI-A RACK COMPARTMENT VI 4

29 15A 2VB166 BENCH BD SECT 2-1 s

2VB801 PAMC-2(POST ACCID MON CNT PNL) 5 30 15A 2VB161 MAIN CONTROL BOARD-REAR PNL 5

2VB805 PAMC-2(P0ST ACCID MON CNT PNL) 5 31 15A 2VB177 RCP V 4E/1 2

32 15A 2VB177 RCP V 4E/1 2

33 15A 2VB177 RCP V 4E/1 2

34 15A 2VB235A GAI-TRONICIS & EVAC. HORN JB 5

35 100A 2VB905 MAIN FEED FROM UPS 2A-1 YES 4

ATTACHMENT 2 BUS VB 2-I FIRE AREA NO. 5

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11548-FE-11AF-0 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A 2VBS1 MAIN BO RACK 1 4

2 15A UNSCHED RVLI S RECORDERS "A" TRAIN 5

DISPLAY PWR SUPPLY "A" TRAIN 5

PLASMA DISPLAY PWR SUPPLY 5

3 15A 2VBS110 2-ICC MP PNL TRAIN A/B 4

4 15A 2VBS102 JB-2-ICC-2 4

5 15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A SPARE 16 15A SPARE 17 15A SPARE 18 15A SPARE 19 15A SPARE 20 15A SPARE 21 15A SPARE 22 15A SPARE 23 15A 2VBS40 PROCESS RACK NO. 1 TB-7 4

24 15A 2VBS45 PROCESS RACK N0.3 TB-8 4

25 15A 2VBS41 PROCESS RACK NO. 1 TB-8 4

26 15A 2VBS46 PROCESS RACK NO. 6 TB-7 4

27 15A 2VBS42 PROCESS RACK NO. 2 TB-7 4

28 15A 2VBS47 PROCESS RACK NO. 6 TB-8 4

29 15A 2VBS43 PROCESS RACK NO. 2 TB-8 4

30 15A 2VBS48 PROCESS RACK NO. 7 TB-7 4

31 15A 2VBS44 PROCESS RACK NO. 3 TB-7 4

32 15A 2VBS49 PROCESS RACK NO. 7 TB-8 4

33 100A 2VB906 UPS 2A-1 YES 4

ATTACHMENT 2 BUS VB 2-IA FIRE AREA NO. 4

. \\

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11548-FE-11AB-7 BRK SIZE CABLc DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A SPARE 2

15A SPARE 3

15A SPARE 4

15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A SPARE 16 15A SPARE 17 15A 2VB281 MAIN CONTROL BD SECT 2-1 5

18 15A 2VB287 MAIN CINTROL BD SECT 2-2 5

19 15A 2VB296 MAIN CONTROL BD REAR PNL 5

20 15A 2VB310 MAIN CONTROL BD SECT 2-1 5

21 15A 2VB332 MAIN CONTROL BD SECT 2-1 5

22 15A 2VB361 MAIN CONTROL BD RACK #2 TB-8 4

23 15A UNSCHED NIS REGULATING XFMR (PR!)

5 24 15A 2VB385 FLOOD MONITOR PNL "B" (UNIT 2) 5 25 15A 2VB278 CHRRM (CONT. HI RANGE RAD MONT 5

2VB903 ISOLATION XFMR 2-ISOX-W YES 4

26 15A SPARE 27 15A 2VB372 NIS PNL #2 5

28 15A 2VB392 SI-8 RACK COMP VI 4

29 15A 2VB285 XMTR H2-A-GW-203 5

2VB781 PAMC-2(POST ACCIDENT MON CONT) 5 30 15A 2VB328 BENCH BD SECT 2-1 5

2vBm PAMC-2(POST ACCIDENT MON CONT) 5 31 15A 2VB273 TB-B NR AIR TEMP MONITRNG PNL 5

32 15A 2VB324 MAIN CONT BD REAR PNL 5

2VB793 PAMW-2(POST ADDID MON CNT PNL) 5 33 15A 2VB602 VNTX-R AUX VENT PNL REAR 5

34 15A 2VB289 RAD MONITORING CABINET 5

35 100A 2VB909 MAIN FEED FROM UPS 2B-1 YES 4

ATTACHMENT 2 BUS VB 2-II FIRE AREA NO. 5

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11548-FE-11AG-2 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A 2VBS21 PROCESS RACK N0.13, TB-6 4

2 15A 2VBS23 BENCHBOARD SECT 2-1, B17G 5

3 15A 2VBS27 2-DAS-1 TA 4

4 15A 2VBS28 2-DAS-1 TA 4

5 15A 2VBS29 2-DAS-1 TA 4

6 15A 2VBS30 PROCESS RACK NO. 11, TB-6 4

7 15A 2VBS31 2-DAS-3 TBA 4

8 15A 2VBS104 JB-2-ICC-2 5

9 15A 2VBS101 ICC MP PNL TRAIN A/B Pl 5

10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A SPARE 16 15A SPARE 17 15A 2VBS68 PROCESS RACK NO. 5, TB-7 4

18 15A 2VBS76 PROCESS RACK NO. 11, TB-7 4

19 15A 2VBS64 PROCESS RACK NO. 5, TB-8 4

20 15A 2VBS77 PROCESS RACK NO. 11, TB-8 4

21 15A 2VBS70 PROCESS RACK NO. 8, TB-7 4

22 15A 2VBS78 PROCESS RACK NO. 12, TB-7 4

23 15A 2VBS71 PROCESS RACK NO. 8, TB-8 4

24 15A 2VBS79 PROCESS RACK NO. 12, TB-8 YES 4

25 15A 2VBS72 PROCESS RACK NO. 9, TB-7 4

26 15A 2VBS80 PROCESS RACK NO. 13, TB-7 4

27 15A 2VBS73 PROCESS RACK NO. 9, TB-8 4

28 15A 2VBS81 PROCESS RACK NO. 13, TB-8 4

29 15A 2VBS74 PROCESS RACK NO. 10, TB-7 4

30 15A 2VBS82 PROCESS RACK NO. 19, TB-7 YES 4

31 15A 2VBS75 PROCESS RACK NO. 10, TB-8 4

32 15A 2VBS83 PROCESS RACK NO. 19, TB-8 4

33 100A 2VB910 SUPPLY FROM UPS 2B-1 YES 4

ATTACHMENT 2 BUS VB 2-I IA FIRE AREA NO. 4

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11548-FE-11AA-7 BRK SIZE CABL~

DEST I NA TI ON 15A SPARE 2

15A SPARE 3

15A SPARE 4

15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A 2VB450 MAIN CONTROL BD REAR PNL 2VB451 NEARV.C.T.

16 15A 2VB456 BENCH BD SECT 2-1 17 15A 2VB461 BENCH BD SECT 2-1 2VB462 RCP-V9C/5 18 15A 2VB481 MAIN CONTROL BD SECT 2-1 19 15A 2VB468 TRAIN "A" RPS TEST RACK 5 20 15A UNSCHED NIS REGULATING XFMR (PR!)

21 15A SPARE 22 15A 2VB536 MAIN BD RACK NO. 3, TB-8 23 15A SPARE 24 15A SPARE 25 15A 2VB556 VENT PNL UNIT #2 26 15A 2VB500 JB IN MER #2 SIA RACK COMP VI 27 15A 2VB522 NIS PNL #3 28 15A 2VB211 PBX RM ADMIN BLDG 2VB769 PAMC-2(POST ACCID MON CNT PNL) 29 15A 2VB773 PAMC-2(POST ACCID MON CNT PNL)

UNSCHED TELEPHONE EQUIPMENT 30 15A UNSCHED SQUENCE OF EVENTS RECORDER 31 15A 2VB540 HTR CONTROL PNL "B" 32 30A SPARE 33 15A 2VB524 PAMC-2(POST ACCID MON CNT PNL) 34 15A 2VB560 MAIN CONTROL BD SECT 2-2 35 100A 2VB907 MAIN FEED FROM UPS 2A-2 APPENDIX R FIRE AREA CIRCUIT YES 5

17 5

5 2

5 4

5 4

YES 5

4 5

31 5

5 5

4 5

5 YES 4

ATTACHMENT 2 BUS VB 2-111 FIRE AREA NO. 5

..;).\\

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11548*FE-11AF*O BRK SIZE CABLE DEST! NA TI ON APPENDIX R FIRE AREA CIRCUIT 15A 2VBS6 INST PROCESS RACK NO. 23 4

2 15A 2VBS8 BENCHBOARD SECT 2-1 5

3 15A 2VBS12 2-DAS-1 4

4 15A 2VBS13 2-DAS-1 4

5 15A 2VBS14 2-DAS-1 4

6 15A 2VBS15 2-DAS-2 4

7 15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A SPARE 16 15A SPARE 17 15A 2VBS113 2-CW*LS-102A RELAYS 4

18 15A SPARE 19 15A 2VBS52 PROCESS RACK N0.14 TB-7 4

20 15A 2VBS59 PROCESS RACK N0.17 TB-8 4

21 15A 2VBS53 PROCESS RACK N0.14 TB-8 4

22 15A 2VBS60 PROCESS RACK N0.18 TB-7 4

23 15A 2VBS54 PROCESS RACK N0.15 TB-7 4

24 15A 2VBS61 PROCESS RACK N0.18 TB-8 4

25 15A 2VBS55 PROCESS RACK N0.15 TB-8 4

26 15A 2VBS62 PROCESS RACK N0.20 TB-7 YES 4

27 15A 2VBS56 PROCESS RACK N0.16 TB-7 4

28 15A 2VBS63 PROCESS RACK N0.20 TB-8 4

29 15A 2VBS57 PROCESS RACK N0.16 TB-8 4

30 15A 2VBS64 PROCESS RACK N0.23 TB-7 4

31 15A 2VBS58 PROCESS RACK N0.17 TB-7 4

32 15A 2VBS65 PROCESS RACK N0.23 TB-8 4

33 SPACE 34 100A 2VB908 UPS 2A*2 YES 4

35 SPACE 36 SPACE ATTACHMENT 2 BUS VB 2-IIIA FIRE AREA NO. 4

SURRY POYER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAYING 11548-FE-11AB-7 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A SPARE 2

15A SPARE 3

15A SPARE 4

15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A 2VB601 MAIN CONTROL BD SECT 2-2 5

16 15A 2VB608 MAIN CONTROL BD SECT 2-1 5

17 15A 2VB641 MAIN CONTROL BD SECT 2-1 5

18 15A 2VB688 MAIN CONTROL BD SECT 2-1 5

19 15A UNSCHED NIS REGULATING XFMR PRIMARY 5

20 15A 2VB717 REAC. PROTECTION RACK SB 4

21 15A 2VB736 RMT LOGIC CABINET TRAIN "8" 4

22 15A SPARE 23 15A 2VB741 MAIN BD RACK #4, TB-8 4

24 15A 2VB760 JB-SV3 EMER. SYITCHGEAR ROOM 4

25 15A 2VB530 PAMC-2(POST ACCID MON CNT PNL) 5 26 15A 2VB935 VNT PNL UNIT 2 YES 5

27 15A 2VB716 NIS PANEL #4 5

28 15A 2VB681 JB #2 MECH EQUIP ROOM #2 31 29 15A 2VB755 RCP VIBRATION DETECTOR PANEL 5

30 15A 2VB785 PAMC-2 5

2VB737 HTR CONT PNL 4

31 15A 2VB650 MAIN CONTROL BD SECT 2-1 5

2VB789 PAMC-2(P0ST ACCIDENT MON CONT) 5 32 15A 2VB594 JB NR TIC-164 BORIC ACID TK-B 17 33 15A 2VB756 AVT/ METEOROLOGICAL PNL 5

34 15A 2VB759 MAIN CONTROL BD SECT 2-2 5

35 100A 2VB911 MAIN FEED FROM UPS 2B-2 YES 4

ATTACHMENT 2 BUS VB 2-IV FIRE AREA NO. 5

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11548-FE-11AG-2 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 15A 2VBS35 PROCESS RACK NO. 25, TB-4 4

2 15A SPARE 3

15A SPARE 4

15A SPARE 5

15A SPARE 6

15A SPARE 7

15A SPARE 8

15A SPARE 9

15A SPARE 10 15A SPARE 11 15A SPARE 12 15A SPARE 13 15A SPARE 14 15A SPARE 15 15A SPARE 16 15A 2VB938 ULTASONIC RCS LEVEL 2

2VB941 ULTRASONIC RECORDER 5

17 15A 2VBS116 2-CW-LS-103B RELAYS 4

18 15A SPARE 19 15A 2VBS86 PROCESS RACK NO. 21 TB-7 YES 4

20 15A 2VBS93 PROCESS RACK NO. 26, TB-8 4

21 15A 2VBS87 PROCESS RACK NO. 21, TB-8 4

22 15A 2VBS94 PROCESS RACK NO. 27, TB-7 4

23 15A 2VBS88 PROCESS RACK NO. 22, TB-7 4

24 15A 2VBS95 PROCESS RACK NO. 27, TB-8 4

25 15A 2VBS89 PROCESS RACK NO. 22, TB-8 4

26 15A 2VBS96 PROCESS RACK NO. 28, TB-7 4

27 15A 2VBS90 PROCESS RACK NO. 25, TB-7 4

28 15A 2VBS97 PROCESS RACK NO. 28, TB-8 4

29 15A 2VBS91 PROCESS RACK NO. 25, TB-8 4

30 15A 2VBS98 PROCESS RACK NO. 29, TB-7 4

31 15A 2VBS92 PROCESS RACK NO. 26, TB-7 4

32 15A 2VBS99 PROCESS RACK NO. 29, TB-8 4

33 100A 2VB912 SUPPLY FROM UPS 2B-2 YES 4

ATTACHMENT 2 BUS VB 2-IVA FIRE AREA NO. 4

SURRY POWER STATION MULTIPLE HIGH IMPEDANCE FAULTS EVALUATION 10CFR50 APPENDIX R REPORT, CHAPTER 9, APPENDIX A REFERENCE DRAWING 11448-FE-11AC-8 BRK SIZE CABLE DESTINATION APPENDIX R FIRE AREA CIRCUIT 1

20A 1SVB6 WASTE DISP CONTROL BD 5

2 20A 1SVB8 BORON RECOVERY CONTROL BD 5

3 20A 1SVB10 INSTR ROOM RACK MBS 3

4 20A 1SVB12 INSTR ROOM RACK MB6 3

5 20A 1SVB14 INSTR ROOM RACK MB7 3

6 20A 1SVB16 INSTR ROOM RACK MB8 YES 3

7 20A 1SVB18 INSTR ROOM RACK WD1 3

8 20A 1SVB20 INSTR ROOM RACK WD2 3

9 20A 1SVB22 INSTR ROOM RACK WD3 3

1SVB23*CATALYTC RECOMB&CNT PNL 17 10 20A 1SVB24 INSTR ROOM RACK BR1 3

11 20A 1SVB26 INSTR ROOM RACK BR2 3

12 20A 1SVB28 INSTR ROOM RACK BR3 3

13 20A 1SVB80 1-GDC-17 TEST PNL 31 14 20A 1SOV823 1-MS-BC-1 YES 5

15 20A 1SVB156 EMERGENCY SWITCHGEAR ROOM #1 3

16 20A 1SVB151 CONT. RM SHIFT SUPV CONSOLE YES 5

17 20A UNSCHED.

CONT. RM SECONDARY LIGHTING 5

18 20A 1SVB41 TURBINE TURN GEAR CONTROL 1-TG 19 20A 1SVB49 IDEWCEL PWR SUPPLY ON COL'M 20 20A 1SVB42 28VDC RECTIFIER FEED FOR TURBN 21 20A 1SVB47 FT BR-132 SEL SWITCH@ J.B.

22 20A 1SVB73 WEATHER& BATTERY RECRDR PNL U1 4

23 20A 1M351 JB NEAR HTG&VNT UNIT 1-VS-HV-4 24 20A SPARE 25 20A 1SVB72 INTAKE SUPV PNL &

5 CNTMT HIGH RNG MONIT. PNL 5

26 20A 1SVB66 BENCHBOARD SEC 1-2 5

27 20A 1SVB5 MAIN XFMR RELAY PNL 3

28 20A 1SVB4 UNIT #1 LOAD FREQ. CONTROL PNL 5

29 20A SPARE 30 20A 1SVB19 E.H. GOVERNOR CONTROL PNL FD.

3 31 20A SPARE 32 50A 1SVB50 PRIMARY OF SOLA XFMR RPI RACK2 3

33 30A 1SVB44 JB NEAR COLM T22 AT FLOWMETERS 31 1SVB52 JB NEAR COLM T18 AT FLOWMETERS 31 34 20A 1SVB58 TB 6C.6, 7 & 8 1SVB59 35 20A 1VMS1 ACOUSTICAL MONIT. PNL 31 36 20A 1HTEMP1 480V EMER SWGR BUS 1H COOL FAN 3

37 20A 1JTEMP1 480V EMER SWGR BUS 1J COOL FAN 3

38 60A UNSCHED.

2SVB1 5

ATTACHMENT 3 BUS 1SVB1 FIRE AREA NO. 5