ML20210D684

From kanterella
Jump to navigation Jump to search
Proposed Tech Specs,Allowing tie-in,startup & Operation of Replacement Spray Sys for Existing Svc Water Spray Sys & Related Components
ML20210D684
Person / Time
Site: North Anna  Dominion icon.png
Issue date: 09/12/1986
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20210D673 List:
References
NUDOCS 8609190298
Download: ML20210D684 (34)
v • d • e


Text

r -y s e ,a ,

g EtTCLOSURE 2

. PRO?OSED TECHNICAL SPECIFI_ CATION REVISION I

i Virginia Electric and Power Company S6")7190295 E60910 52 DR AGCCh 05000332 P PIF1

- ~-

  • 6 TABLE 3.3.1! ,

FIRE DETECTION INSTNJMENTATION MINIMUM DETECTORS REQUIRED INSTRQHEN; LOCATION EEAT SMOKE Auail?.ary Building (cont'd) ,

e. General Area Elevation 244'# 1
f. General Area Elevation 259'# 4
g. General Area Elevarion 274'# 14 ,
h. General Area Elevation 291'# 4 .

.i . Charcoal Filters

1. Intake Side # 3/rcom
2. Outlet Side # 3/rocm
12. Service Water Pump House # 8
13. Auxiliary Service Water Pump Hocuee 1 t

i 14. Auxiliary Feed Vater Pump House a.

Turbine. Pump Room 1 .

b. Motor Pump Room 3
15. Quench Spray Pump Houst  ;

, a. Main Floor 2

b. Basement 4
16. Safeguards Area Ventilation 6
a. System Exhaust Duct 1
17. Main Steam Valve House 1
16. Fuel Building # 10
19. Casing Cooling Pump Heuse 1
20. Post Accident Hydrogen Recombiner Vault # 1
21. Fire Pump Honse # 1
22. Centrol Room Air Conditioning (

Chiller Roca 1

+

j 23. Service Water Valve House #

a. West room 2
b. Northeast room I
c. Scucheast room 1

heat detector provided the bearing or rator temperature (s) is monitored at  !

least once per hour when the RCP is in operation. '

  1. Common to Units 1 and 2. l

! NORTH ANNA - UNIT 1 0/4 3-$3a  ;

.1

~

TABLE 3.7-5

{ ALLOWABLE TOTAL SETTLEMENT OR DIFFERENTIAL SETTLEMENT FOR CLASS 1 STRUCTURES ..

~d ALLOWASLE ALLOWABLE g TOTAL DIFFERENTIAL J- SETTLEMENT SETTLEMENT SETTLFMENT* SETTLEMENT *

  • POINT STRUCTURE POINT STRUCTURE / COMPONENT __

(FERT) (FEET)

E q 15,16,17, North Side of Expansion Joint 0.22 from 3/78 N/A '

,, 16 Service Water Piping at 3WPH 228 Decontamination Building 25ti Pipe Tunnel N/A 0.06 226 Fuel Building 251 Waste Gas Decay Tank Enclosure N/A 0.06 3 Service Water Pump House M-569,H-584 Pipe Hanger in Reservoir N/A 0.17 114 Service Building (E-17) 0.09 N/A.

141 Safeguardn Area - Ilnit i 253 Unit 1 - Casing Ceoling Bldg. N/A 0,12 from 2/79 s

158 *** Turbine Building (B-9 1/2) 0.06 N/A B

U 245,246 ruel Oil Pump House 0.03 N/A 206,207, 738,209 B0ron kccovery Tank bike 0.03 N/A 204 Circulating Water Intake Structurd 0.15 N/A 25, 26 I 27, 28 Service Water Valve House 0.32 (see N/A note) 29, 30, 31, 32 Service Water Tie-In Vault 0.12 (see N/A 4

note) i NOTE: From Date of Piping Tie-Ir

  • Unless otherwise indicated, allowable settlements are from baseline established in May 1976 or reference elevations corrected to the May 1976 survey.
    • Critical differential settlement is downward of Point 117.with respect to Point 113.
      • Not Class I structure, but settlements affects Class 1 pipeline.

g TABLE 3.7-6 ALLOWABLE GROUNDWATER LEVELS - SERVICE WATER RESERVOIR

' PIEZOMETER PIEZOMETER ALLOWABLE GROUNDWATER ELEVATION ,

@ NO. LOCATION Mean Sea Level (feet)

U

- 10 SE, toe 277 11 SWPH, (Units 1 & 2) crest 280 12 SWPH, (Units 1 & 2) toe 285 13 SWPH, (Units 1 & 2) crest 280 14 SWPH, (Units 1 & 2) crest 280 w 15 SE, crest 280 N

y 16 SE, crest 280 h

17 SE, crest 280 18 SWVH, (Units 1 & 2) 295 ALLOWABLE DRAIN FLOW RATE DRAIN OUTLETS LOCATION (gallons per minute)

I through 6 Drainage Gallery FLOW RATE SHALL NOT EXCEED 8.5 GALLONS PER MINUTE (gpa)

TABLE 4.8-1 LIST OF LOAD SEQUENCING TIMERS AND DESIGN SET POINTS "H" BUS TIMER SET POINT INITIATING ( TOLERANCE IDENTIFICATION (SECONDS) SIGNAL (SECONDS) 1FWEA01-62 20 SI +1.00 IFWEA01-62A 25 LOP +1.25 ISWEA03-62 10 LOP +0.50 1RSOA01-62B 35 LOP +1.75 1RSOA01-62A 210 CDA +21.00 ICCPA01-62Y 15 LOP +0.75 1CCPA01-62X 20 LOP +1.00 1RSIA01-62A 20 LOP +1.00 1RSIA01-62 195 CDA +9.75 1QSSA01-62A 15 LOP +0.75 1HVRA03-62 30 LOP +1.50 1HVRA04-62 10 LOP +0.50 1HVRB04-62 10 LOP 10.50 1PGSA02-62A 10 (2) +0.50 1ENSH06-62A 15 LOP +0.75 1HVRC04-62 10 LOP +0.50 ISWSA35-62A1A 15 SI 11.50 ISWSA35-62B1A 15 SI 21.50 NORTH ANNA - UNIT 1 3/4 8-4a

. . _ . - . . . . ~ . . . . - .

TABLE 4.8-1-(Continued)

LIST OF LOAD SEQUENCING TIMERS AND DESIGN SET POINTS "J" BUS

! r TIMER SET POINT INITIATING ( TOLERANCE IDENTIFICATION (SECONDS) SIGNAL (SECONDS) 1FWEB01-62 20 SI +1.00 1FWEB01-62A 25 LOP +1.25 ISWEB03-62 10 LOP +0.50 1RSOB01-62B 35 LOP +1.75 1RSOB01-62A 210 CDA +21.00 1CCPB01-62Y 15 LOP +0.75 1CCPB01-62X 20 LOP +1.00 1RSIB01-62A 20 LOP +1.00, 1

] 1RSIB01-62 195 CDA +9.75 1 1QSSB01-62A 15 LOP +0.75 l 1HVRB03-62 30 LOP +1.50 1HVRD04-62 10 LOP +0.50 1HVRE04-62 10 LOP +0.50 l 1HVRF04-62 10 LOP 0.50

IPGSB02-62A 10 (2) +0.50 1ENSJ06-62A 15 LOP 10.75 ISWSB35-62A1B 15 SI 1.50 ISWSB35-62B1B 15 SI 11.50 (1) SI - Safety Injection LOP- Loss of Offsite Power CDA- Containment Depressurization Actuation (2) Low primary grade water header pressure i,

1 NORTH ANNA - UNIT 1 3/4 8-4b

l PLANT SYSTEMS BASES Reference Monitoring Points Limiting Item Containment Unit 1 Fuel Building Fuel Transfer Tube Containment Unit 1 Auxiliary Building 3"-WGCB-14 Containment Unit 1 Unit 1 Safeguards Area 12"-SI-1 Containment Unit 1 Unit 1 Main Steam Valve House 6"-SI-16 Containment Unit 1 Service Building (E-3) 32"-SHP-2 Safeguards Area Unit i Unit 1 Main Steam Valve House 8"-Q5-3 Auxiliary Building Unit 1 Main Steam Valve House 8"-WS-113 Auxiliary Building Fuel Building 4"-RP-28 Auxiliary Building Service Building Tunnel 24"-WS-102 Service Water Pump House Service Water Piping at SWPH Expansion Joint Service Water Pump House Pipe Hanger in Reservoir 24"-WS-11-151-Q3 Service Water Pump House Service Water Pump House Mat Service Bldg. (E-5 E-6) Unit 1 Main Steam Valve House 24"-WS-26-151-Q3 Service Bldg. (E-14) Unit 2 Main Steam Valve House 24"-WS-426-151-Q3 Auxiliary Feedwater Pump House - Unit 1 Pipe Tunnel 3"-WAPD-9-601-Q3 Decontamination Bldg. Pipe Tunnel 3"-CC-90-151-Q3 Fuel Building Waste Gas Decay Tk. Enclosure 4"-GW-30-154-Q3 Safeguards Area Unit 1 Unit 1 Casing Cooling Building 6"-RS-E15-153A-Q3 The items limiting total settlement of structures are as follows:

4 Monitoring Points Limiting Items Service Water Piping at SWPH 36"-WS-1-151-Q3 Service Building (E-17) 36"-WS-1-151-Q3 Turbine Building (B-9 1/2) 24"-WS-25-151-Q3 Fuel Oil Pump House 2 1/2"-F0F-151-S Boron Recovery Tank Dike NOTE (1)

Circulating Water Intake Service Water Piping Structure expansion joint Service Water Valve House 32 1/4" - WS-D84-151-Q3 Service Water Tie-In Vault 36" - WS-1-151-Q3 Note (1) No settlement expected; settlement in excess of 0.03 ft. would indicate an abnormality.

(2) Measurements of certain points are required to be performed at least once per 31 days for the first five years of facility operation to provide additional settlement information.

NORTH ANNA - UNIT 1 B 3/4 7-8

TABLE 3.'3-11 FIRE DETECTION INSTRUMENTATION t ,.

MINIMUM DETECTORS REQUIRED ~

INSTRUMENT LOCATION HEAT SMOKE Auxiliary. Building (cont'd) ,

e. General Area Elevation 244'# 1~

"~

f. General Area Elevation 259'# 4
g. General Area Elevation 274'# 14
h. General Area Elevation 291'# 4 Y
i. Charcoal Filters
1. Intake side # 3/ room
2. ' Outlet Side # 3/ room i
12. Service Water Pump House # 8 _
13. Auxiliary Service Water Pump House # 1
14. Auxiliary Feed Water Pump House
a. Turbine Pump Room. 1
b. Motor Pump Room 3
15. Quench Spray Pump House
a. Main Floor 2
b. Basement 4
16. Safeguards Area Ventilation
a. System Exhaust Duct 1
17. Main Steam Valve House -

1

18. Fuel Building # 10
19. Casing Cooling Pump House 1
20. Post Accident Hydrogen Recombiner Vault # 1
21. Fire Pump House # 1
22. Control Room Air Conditioning Chiller Room 1
23. Service Water Valve House #
a. West room 2
b. Northeast room 1
c. Southeast room 1
  • A RCP bearing or motor temperature may be substituted for an inoperable RCP heat detector provided the bearing or motor temperature (s) is monitored at least once per hour when the RCP is in operation.
  1. Common to Units 1 and 2.

NORTH ANNA - UNIT 2 3/4 3-50a

u.

i84 is:

TABLE 3.7-5 (continued)

$ ALLOWABLE TOTAL SETTLEMENT OR DIFFERENTIAL SETTLEMENT FOR CLASS 1 STRUCTURES ' ^ 4 -7 m

H J

  • ALLOWABLE ALLOWABLE  ;

@ TOTAL DIFFERENTIAL .

% SETTLEMENT SETTLEMENT SETTLEMENT * . SETTLEMENT

  • i POINT STRUCTURE POINT STRUCTURE / COMPONENT (FEET) (FEET)
l 226 Fuel' Building 251 Waste Gas Decay Tank Enclosure N/A 0.06 a

w 104 Safeguards Area Unit 2 254 Unit 2 Casing Cooling Building N/A 0.12 from 2/79 7,10 Service Water Pump 15,16 Service Water Piping at SWPH N/A 0.22 House 17 or 18 North Side of Expansion Joint from 7/77 8 Service Water Pump .H-569 Pipe Hanger in Reservoir N/A 0.17 House H-584 15,16 Service Water Piping 0.22 from N/A at SWPH 8/78 Ad 17,18 North Side of

" Expansion Joint 204 Circulating Water 0.15 N/A Intake Structure 158 *** Turbine Building 0.06 N/A (B-9 1/2) 114 Service Building (E-17) 0.09 N/A 245,246 Fuel Oil Pump House 0.03 N/A 206,207, Boron Recover Tank Dike 0.03 N/A 208,209 25,26,27,28 Service Water Valve House 0.32(see note) N/A 29,30,31,32 Service Water Tie-In Vault 0.12(see note) N/A NOTE: From Date of Piping Tie-In

.O 2

> TABLE 3.7-6 .

E

> ALLOWABLE GROUNDWATER LEVELS - SERVICE WATER RESERVOIR I .

E n

n PIEZOMETER PIEZOMETER ALLOWABLE GROUNDWATER ELEVATION NO. LOCATION Mean Sea Level (feet) 10 SE, toe 277 11 SWPH, (Units 1 & 2) crest 280 12 SWPH, (Units 1 & 2) toe 285 13 SWPH, (U'its n 1 & 2) crest 280 14 SWPH, (Units 1 & 2) crest 280 w

3 15 SE, crest 280 y 16 SE, crest 280 m

17 SE, crest 280 18 SWVH, (Units 1 & 2) 295 ALLOWABLE DRAIN FLOWRATE DRAIN OUTLETS LOCATION ~ (gallons per minute)

I through 6 Drainage Gallery FLOW RATE SHALL NOT EXCEED 8.5 GALLONS PER MINUTE ^(gpm)

TABLE 4.8-1 LIST OF LOAD SEQUENCING TIMERS AND DESIGN SETPOINTS "H" BUS TIMER SET POINT INITIATING ( TOLERANCE IDENTIFICATION (SECONDS) SIGNAL (SECONDS) 2FWEA01-62 20 SI 1.00 2FWEA01-62A 25 LOP !1.25 2SWEA03-62 10 LOP !0.50 2RSOA01-62B 35 LOP 21.75 221.0 2RSOA01-62A 210 CDA 2CCPA01-62Y 15 LOP 0.75 2CCPA01-62X 20 LOP 21.00 2RSIA01-62A 20 LOP 1.00 2RSIA01-62 195 CDA 29.75 2QSSA01-62A 15 ' LOP 20.75 2HVRA03-62 30 LOP 1.50 2HVRA04-62 10 LOP 20.50 j 2HVRB04-62 10 LOP !0.50 2HVRC04-62 10 LOP 0.50 2ENSH06-62A 15 LOP !0.75 2SWSA35-62A2A 15 SI !1.50 2SWSA35-62B2A 15 SI 1.50 NORTH ANNA - UNIT 2 3/4 8-7

t TABLE 4.8-1 (Continued)

LIST OF LOAD SEQUENCING TIMERS AND DESIGN SETPOINTS "J" BUS TIMER SET POINT. INITIATING ( ) TOLERANCE IDENTIFICATION ~(SECONDS) SIGNAL (SECONDS) 2FWEB01-62 20 SI 1.00 2FWEB01-62A 25 LOP 1.25 2SWEB03-62 10 LOP 0.50 2RSOB01-62B' 35 LOP 1.75 2RS0B01-62A 210 CDA !21.0 2CCPB01-62Y 15 LOP !0.75 2CCPB01-62X 20 LOP 11.00 2RSIB01-62A 20 LOP 21.00 2RSIB01-62 195 CDA 19.75 2QSSB01-62A 15 LOP 0.75 1

2HVRB03-62 30 LOP 11.50 2HVRD04-62 10 LJP 10.50 2HVRE04-62 10 LOP 0.50 2HVRF04-62 10 LOP 10.50 i 2ENSJ06-62A 15 LOP 10.75 2SWSB35-62A2B 15 SI 21.50 2SWSB35-62B2B 15 SI tl.50 (1) SI - Safety Injection LOP - Loss of Offsite Power

. CDA - Containment Depressurization Actuation

}

4 4

NORTH ANNA - UNIT 2 3/4 8-8 8

, , - , ,, ,-. . - , . - , - - - - y. .w., -

...-,--.r-- - . , - , ..--,.%-  %,,.,_.m, , , y,w,,,,y,_..-m..- ,-- ,4. ..-, .

TABLE 3.8-2 MOTOR-OPERATED VALVES-THERMAL OVERLOAD PROTECTION AND/OR BYPASS DEVICES l Valve Number Function Bypass Device MOV-QS200A Quench-Spray Pump Suction Valve No MOV-QS200B Quench Spray Pump Suction Valve No-MOV-QS201A Quench Spray Pump Discharge Valve No l MOV-QS201B Quench Spray Pump Discharge Valve No

, MOV-QS202A . Chemical Addition to Refueling Water Storage Tank Valve No

-MOV-QS202B _ Chemical Addition to Refueling Water Storage Tank Valve No '

4 -. MOV-RS200A Casing Cooling to Outside Recirculation Spray Pump No p MOV-RS200B Casing Cooling to Outside Recirculation Spray Pump No Casing Cooling to Outside Recirculation Spray Pump MOV-RS201A No MOV-RS201B Casing Cooling to Outside Recirculation Spray Pump No i MOV-RS255A Outside Recirculation Spray Pump Suction Valve No MOV-RS255B Outside Recirculation Spray Pump Suction Valve No

MOV-RS256A Outside Recirculation Spray Pump Discharge Valve No l.

MOV-RS256B Outside Recirculation Spray Pump Discharge Valve No i

4 MOV-SW201A Recirculation Spray Heat Exchanger Supply Header No Isolation

.MOV-SW201B Recirculation Spray Heat Exchanger Supply Header No' j Isolation i MOV-SW201C Recirculation Spray Heat Exchanger Supply Header No Isolation MOV-SW201D Recirculation Spray Heat Exchanger Supply Header No Isolation
MOV-SW203A Recirculation Spray Heat Exchanger Supply Shutoff No l MOV-SW203B Recirculation Spray Heat Exchanger Supply Shutoff No MOV-SW203C Recirculation Spray Heat Exchanger Supply Shutoff No MOV-SW203D Recirculation Spray Heat Exchanger Supply Shutoff No MOV-SW202A Recirculation Spray Heat Exchanger Supply Header No Crossover Isolation Valve
MOV-SW206A- Recirculation Spray Heat Exchanger Supply Header No Crossover Isolation Valve MOV-SW202B Recirculation Spray Heat Exchanger Supply Header No

!' Isolation MOV-SW206B Recirculation Spray Heat Exchanger Supply Header No i Isolation i MOV-SW204A Return from Recirculation Spray Heat Exchanger No

MOV-SW204B Return from Recirculation Spray _ Heat Exchanger No l MOV-SW204C Return from Recirculation Spray Heat Exchanger No l MOV-SW204D- Return from Recirculation Spray Heat Exchanger No Recirculation Spray Heat Exchanger Return Header

~

MOV-SW205A No Isolation MOV-SW205B Recirculation Spray Heat Exchanger Return Header No

Isolation i

l- NORTH ANNA - UNIT 2 3/4 8-22

j .

TABLE 3.8-2 (Continued)

MOTOR-OPERAir;D VALVES-THERMAL OVERLOAD PROTECTION AND/OR BYPASS DEVICES Valve Number Function Bypass Device MOV-SW205C Recirculation Spray Heat Exchanger Raturn Header No Isolation MOV-SW205D Recirculation Spray Heat Exchanger Return Header No Isolation MOV-SW208A Component Cooling Heat Exchanger Supply Valve No MOV-SW208B Component Cooling Heat Exchanger Supply Valve No MOV-SW210A Supply to Air Cooling Coils No

MOV-SW210B Supply to Air Cooling Coils No MOV-SW214A Return from Air Cooling Coils No MOV-SW214B Return from Air Cooling Coils No MOV-SW215A Auxiliary S.W. Pump Discharge Header Isolation Valve No MOV-SW215B Auxiliary S.W. Pump Discharge Header Isolation' Valve No MOV-SW217 Auxiliary S.W. Pump Discharge Header Isolation Valve No MOV-SW213A Fuel Pit Coolers Supply Header No MOV-SW213B Fuel Pit Coolers Supply Header No MOV-SW219 Cir. Water Intake Service Water Pump Make-up No 4

Isolation Valve MOV-SW220A S.W. Discharge to Cire. Tunnel No MOV-SW220B S.W. Discharge to Cire. Tunnel No MOV-SW221A SWR Spray Header No MOV-SW221B SWR Spray Header No MOV-SW222A SWR Spray Header No MOV-SW222B SWR Spray Header No

MOV-SW223A SWR Spray Bypass No j MOV-SW223B SWR Spray Bypass No MOV-FW200A Aux. Steam Generator Feedpump Discharge Valve No
MOV-FW200B Aux. Steam Generator Feedpump Discharge Valve No L MOV-FW200C Aux. Steam Generator Feedpump Discharge Valve No MOV-FW200D Aux. Steam Generator Feedpump Discharge Valve No
MOV-HV204-1 Emergency Control Room Vent No MOV-HV204-2 Emergency Control Room Vent No MOV-HV211A A/C Control Room Chiller Cutlet No MOV-HV211B A/C Control Room Chiller Outlet No MOV-HV211C A/C Control Room Chiller Outlet No MOV-HV213A A/C Cond. Water Discharge No MOV-HV213B A/C Cond. Water Discharge No j MOV-HV213C A/C Cond. Water Discharge No MOV-HV218-1 Emergency Air Supply No MOV-HV218-2 Emergency Air Supply No MOV-2700 Residual Heat Removal Inlet Isolation Valve No MOV-2701 Residual Heat Removal Inlet Isolation Valve No MOV-2720A Residual Heat Removal Outlet Isolation No
MOV-2720B Residual Heat Removal Outlet Isolation No j MOV-2590 Reactor Coolant System Loop A Hot Leg Stop Valve No i

MOV-2592 Reactor Coolant System Loop B Hot Leg Stop Valve No MOV-2594 Reactor Coolant System Loop C Hot Leg Stop Valve No l HOV-2591 Reactor Coolant System Loop A Cold Leg Stop Valve No NORTH ANNA - UNIT 2 3/4 8-23 i

1

,,m~ -

.on . . - . . . . - - - . , - , , , . , , ~ , - - - - . , . . - , . - - ~ -

n,,-n.-.,.n-, ny a n m _ ,-- ,,.- n- a ,,,mwy.,-.,--,-mr-,,

~

TABLE 3.8-2 (Continued)

MOTOR-OPERATED VALVES-THERMAL OVERLOAD PROTECTION AND/OR BYPASS DEVICES Valve Number Function Bypass Device MOV-2593 Reactor Coolant System Loop B Cold Leg Stop Valve No MOV-2595 Reactor Coolant System Loop C Cold Leg Stop Valve No MOV-2585 Reactor Coolant System Loop A Bypass No MOV-2586 Reactor Coolant System Loop B Bypass No MOV-2587 Reactor Coolant System Loop C Bypass No MOV-2381 RCP Seal Leakoff Isolation Valve No MOV-2380 RCP Seal Leakoff Isolation Valve No MOV-2535 Reactor Coolant System Pressurizer Relief Isolation No Valve MOV-2536 Reactor Coolant System Pressurizer Relief Isolation No Valve MOV-2115B Charging Pump Suction from Refueling Water Storage No Tank MOV-2115C Charging Pump Suction from Volume Control Tank No MOV-2115D Charging Pump Suction from Refueling Water Storage No Tank MOV-2115E Charging Pump Suction from Volume Control Tank No MOV-2286A Charging Pump A Discharge No MOV-2287A Charging Pump A Alternate Discharge No MOV-2286B Charging Pump B Discharge No MOV-2287B Charging Pump B Alternate Discharge No MOV-2286C Charging Pump C Discharge No MOV-2287C Charging Pump C Alternate Discharge No MOV-2289A Charging Pumps Discharge Line Stop Valve No MOV-2289B Charging Pumps Discharge Line Stop Valve No-MOV-2373 Charging Pumps Recirculation Stop Valve No MOV-2275A Charging Pump A Recirc. Stop Valve No MOV-2275B Charging Pump B Recirc. Stop Valve No MOV-2275C Charging Pump C Recire. Stop Valve No e MOV-2350 Emergency Borate Valve No MOV-2370 Charging Pump to Seal Water Recitc. Stop Valve No MOV-2836 High Head Cold Leg Safety Injection Isolation Valve No MOV-2869A Charging Pump Discharge Header Safety Injection No ,

Stop Valve MOV-2869B Charging Pump Discharge Header Safety Injection No Stop Valve MOV-2267A Charging Pump A Suction Valve (VCT) No MOV-2267B Charging Pump A Suction Valve (LHSI) No MOV-2269A Charging Pump B Suction Valve (VCT) No MOV-2269B Charging Pump B Suction Valve (LHSI) No MOV-2270A Charging Pump C Suction Valve (VCT) No MOV-2270B Charging Pump C Suction Valve (LHSI) No MOV-2860A Low Head Safety Injection Pump A Suction Valve No MOV-2860B Low Head Safety Injection Pump B Suction Valve No MOV-2862A Low Head Safety Injection Pump A Suction Valve No MOV-2862B Low Head Safety Injection Pump B Suction Valve No NORTH ANNA - UNIT 2 3/4 8-24

TABLE 3.8-2 (Continued)

MOTOR-OPERATED VALVES-THERMAL OVERLOAD PROTECTION AND/OR BYPASS DEVICES Valve Number Function Bypass Device MOV-2863A Low' Head Safety Injection Pump A Discharge to No Charging Pumps MOV-2863B Low Head Safety Injection Pump B Discharge to No Ch4rging Pumps MOV-2864A Low Head Safety Injection Pump A Discharge Valve No i MOV-2864B Low Head Safety Injection Pump B Discharge Valve No MOV-2885A Low Head Safety 7njection Pump A Rec. Valve No MOV-2885B Low Head Safety Injection Pump B Rec. Valve No MOV-2885C Low Head Safety Injection Pump A Recire. Valve No MOV-2885D Low Head Safety Injection Pump B Recire. Valve No MOV-2890A Low Head Safety Injection Pump A Discharge Line No Stop Valve MOV-2890B Low Head Safety Injection Pump B Discharge Line No Stop Valve MOV-2890C Low Head Safety Injection Pump Discharge Line No Stop Valve MOV-2890D Low Head Safety Injection Pump Discharge Line No Stop Valve MOV-2867A Boron Injection Tank Inlet Valve No MOV-2867B Boron Injection Tank Inlet Valve No MOV-2867C- Boron Injection Tank Inlet Valve No MOV-2867D Boron Injection Tank Inlet Valve No MOV-2865A- Accumulator Tank Discharge Valve No MOV-2865B Accumulator Tank Discharge Valve No MOV-2865C Accumulator Tank Discharge Valve No i

l i

l NORTH ANNA - UNIT 2 3/4 8-25 i

PLANT SYSTEMS' BASES 3/4.7.12 SETTLEMENT OF CLASS 1 STRUCTURES (Continued)

Allowable differential movement is controlled by pipe deflections permitted ~ by fixation points in buildings. The items limiting differential settlement are as follows:

Reference Monitoring Points Limiting Item Containment Unit 2 Fuel Building Fuel Transfer Tube Containment Unit 2 Auxiliary Building _ 3"-SI-417 Containment Unit 2 Unit 2 Safeguards Area 6"-RH-418 Containment Unit 2 Unit 2 Main Steam Valve House 6"-SI-416 Containment Unit 2 Service Building (E-15) 16"-WFPD-409 Safeguards Area Unit 2 Unit 2 Main Steam Valve House 24"-WS-426 Auxiliary Building Unit 2 Main Steam Valve House 8"-SI-440 Auxiliary Building Fuel Building 4"-RP-28 Auxiliary Building Service Building Tunnel 24"-WS-102 Service Building

-(E-5 E-6) Unit 1 Main Steam Valve House 24"-WS-26-151-Q3 Service Building (E-14) Unit 2 Main Steam Valve House 24"-WS-426-151-Q3 Auxiliary Feedwater Pump House Unit 2 Pipe Tunnel 6"-WCMU-412-151-Q3 Decontamination Building Pipe Tunnel 3"-CC-90-151-Q3 Fuel Building Waste Gas Decay Tank Enclosure 4"-GW-30-154-Q3 Safeguards Area Unit 2 Unit 2 Casing Cooling Building 6"-RS-455-153A-Q3 i Service Water Pump- House Service Water Piping at SWPH Expansion Joint Service Water Pump House Pipe Hanger in Reservoir 24"-WS-11-151-Q3 Service Water Pump House Service Water Pump House Mat The items limiting total settlement of structures are as follows:

Monitoring Points Limiting Items i

Service Water Piping at SWPH 36"-WS-1-151-Q3 Circulating Water Intake Structure Service Water Piping Expansion Joint Turbine Building (B-9 1/2) 24"-WS-425-151-Q3 Service Building (E-17) 36"-WS-1-151-Q3 Fuel Oil Pump House 2 1/2"-F0F-151-S Boron Recovery Tank Dike No settlement expected; settlement in excess of 0.03 feet would

indicate an abnormality.

1 Service Water Valve House 32 1/4"-WS-D84-151-Q3 Service Water Tie-In Vault 36"-WS-1-151-Q3 i

NORTH ANNA - UNIT 2 B 3/4 7-8

_t ENCLOSURE 3 SAFETY EVALUATION SERVICE WATER RESERVOIR IMPROVEMENTS NORTH ANNA POWER STATION UNIT NOS. 1 AND 2 VIRGINIA ELECTRIC AND POWER COMPANY l

i 15-MDS-692C-1

  • r DISCUSSION The proposed changes to the Unit 1 and 2 Technical Specifications would modify several component and structure tabulations to allow operation and surveillance of a replacement service water spray array system. The design features of the replacement system are outlined in Enclosure 1. These design changes have been

. reviewed in accordance with 10CFR50.59 and found not to involve an unreviewed safety question.

The need to revise the Technical Specifications arises primarily from the addition of equipment (i.e. replacement of motor-operated valves, piping, instrumentation) and structures (i.e. service water valve house, tie-in vault).

Technical Specification 3/4.3.3 addresses various types of monitoring instrumentation. Section 3/4.3.3.7 discusses Fire Detection Instrumentation.

Table 3.3-11 requires revision to include fire detection instrumentation in the new service water valve house. This instrumentation consists of temperature detectors of the rate-compensated, electric-contact type similar to those used throughout the plant in areas such as the normal switchgear room, cable-tray-spreading room, primary cable vault and tunnels, etc. The minimum number of operable heat detectors required in the valve house is four: two in the west room and one in each of the east rooms. A total of seven heat detectors will be installed which includes three in the west room and two in each of the east rooms. The heat detection system for the service water valve house has been designed in accordance with applicable NFPA Standards and is consistent with the requirements outlined in UFSAR Section 9.5.1 in tenns of spacing, location and type of hazard being served.

Technical Specification 3/4.7.12 addresses settlement of Class 1 structures.

The new service water valve house and tie-in vault need to be included in the Settlement Monitoring program. Table 3.7-5 requires revision to include these

, two structures. In addition to the Limiting Condition for Operation (LCO) listed in Table 3.7-5, the Bases section of 3/4.7.12 also requires revision to include the valve house and tie-in vault monitoring points and their associated limiting items.

Four settlement markers will be added to the valve house and tie-in vault.

Baseline elevations will be established for the points prior to final system tie-in. At intervals defined in the Technical Specifications, the elevations of these points will be measured by accurate survey. The baseline elevations will be periodically compared to current values; if the change exceeds prescribed limits, appropriate action is taken. The settlement monitoring points, limiting values and monitoring frequencies for the service water valve house and tie-in vault are consistent with the requirements for other Class I structures and satisfy the requirements outlined in the bases of the Technical Specifications and UFSAR Section 3.8.4.

Technical Specification 3/4.7.13 addresses the groundwater level in the service water reservoir. Table 3.7-6 requires revision to show the location of Piezometer No. 18 at the new service water valve house. This location is currently monitored as part of 3/4.7.13. The change proposed here is to change the designation of this point from "SWPH, (Units 3 and 4)" to "SWVH, (Units 1 and 2)."

15-MDS-692C-2

o .

Technical Specification 3/4.3.1 "A.C. Sources" addresses the A.C. electrical power sources. Table 4.8-1 provides a listing of load sequencing timers and this table requires revision to include new timers for the Service Water Reservoir discharge M0V's. This change incorporates a fifteen second time delay between the occurrence of a safety injection (SI) signal and the actuation of the replacement spray array motor-operated valves (M0Vs). All bypass M0Vs will receive SI signals to "close" and all spray array MOVs will receive SI signals to "open." However, in order to reduce the negative starting effects these MOVs would have on the emergency electrical distribution system, a time delay to start has been incorporated into the design. Drlaying the operation of the spray array and bypass M0V's fifteen seconds would not detrimentally affect the service water system for the following reasors:

1. The additional heat dissipation requirement (above normal ' eat load) on the service water system during the first fifteen seconds following a SI signal is negligible with the delayed M0V starting.
2. The most significant heat load generated f rom the accident unit and removed by service water originates from the recirculation spray (RS) coolers. The RS system does not function until t = 195 seconds after the accident when the inside recirculation spray pumps start, provided a Containment Depressurization Signal (CDA) is present.

Technical Specifications do not specify engineered safety feature response times for the service water system, therefore, delaying the operation of the service water spray array and by-pass M0V's for 15 seconds is justifiable in accordance with the above. Delaying the operation of these valves will have a positive effect on the station's electrical distribution system during accident scenarios (i.e. GDC-17 voltage profiles).

Technical Specification 3/4.8.2 "Onsite Power Distribution System" addresses the onsite power distribution system which must be operable. Unit 2, Table 3.8-2 identifies M0Vs with thermal overlot d protectors and/or bypass devices.

This table will be revised to reflect the addition of new MOVs. The table will also show that there are no bypass devices for these MOVs. In addition, since these valves are replacing the existing spray array motor-operated valves, the entries in the table for the existing M0V-SW200 A&B are being deleted. The new valves meet or exceed the original design requirements of the existing valves and their design, including the motor thermal overload protection, is consistent with the design basis of the service water system as outlined in UFSAR Section 9.2.1.

BASIS FOR NO SIGNIFICANT HAZARDS DETERMINATION The proposed Technical Specification changes do not involve a significant hazards consideration because operation of North Anna Units 1 and 2 in accordance with these changes would not:

1. involve a significant increase in the probability or consequence of an accident previously evaluated. The replacement design and equipment (specifically, the fire detection instrumentation - Section 3/4.3.3.7, settlement markers and limits - Section 3/4.7.12, load sequence timers

- Section 3/4.3.1 and motor operated valves with thermal overload protectors - Section 3/4.8.2) meet or exceed the original safety-related requirements of the existing service water system as noted above.hange involves ac in n6menclature.The chanae to Technical Specification 3/4.7.13

~

15-MDS-692C-3

9

2. create the possibility of a new or different kind of accident from any

. accident previously identified. It has been determined that a new or different kind of accident will not be possible due to these changes.

The-design and operating bases of the replacement spray system are consistent with and meet or exceed the requirements of the existing system. No new accidents are introduced by the new design.

3. involve a significant reduction in a margin of safety. The margin of safety is not reduced since the replacement system serves the same purpose as the existing spray array system and the replacement design and equipment meet or exceed the original safety-related requirements of the existing service water system. The Limiting Condition for Operation and Surveillance Requirements of the Technical Specification sections 3/4.7.4 Service Water System and 3/4.7.5 Ultimate Heat Sink remain unchanged by these proposed modifications.

Therefore, pursuant to 10CFR50.92 based on the above consideration, it has been determined that these changes'do not involve a significant safety hazards consideration.

i i

i 1

r 15-MOS-692C-4

- = - + - -.y'

- * - . - - - - - ---,w c ei e- m -y- m*p --T*,-**+- &-----mv-*=-----N*e-' +47-?Wm+==7 -.--------+-+--+y '

e-*w-Y w - - -

BASIS FOR NO UNREVIEWED SAFETY QUESTION DETERMINATION The proposed design changes and Technical Specification changes do not involve an unreviewed safety question because these changes do not:

1. involve an increase in the probability of occurrence or the consequences of an accident or malfunction of equipment important to safety previously evaluated in the UFSAR. The replacement design and equipment (specifically, the fire detection instrumentation - Section 3/4.3.3.7, settlement markers and limits - Section 3/4.7.12, load sequence timers - Section 3/4.3.1 and motor operated valves with thermal overload protectors - Section 3/4.8.2) meet or exceed the original safety-related requirements of the existing service water system. The replacement system uses a new safety related flow path and spray arrays to accomplish the cooling process. The new spray system will provide increased margin between design heat rejection capability and required heat rejection capability. In addition, because the new system consists of four individually controlled spray arrays in each of the two redundant service water headers as opposed to two spray arrays per header in the current system, the consequences of a single failure of a motor operated valve are reduced (i.e., the heat rejection capability of the remaining spray arrays in the affected header would be greater than that remaining after a single valve failure in the existing configuration). The change to Technical Specification 3/4.7.13 only involves a change in nomenclature.
2. create the possibility for an accident or malfunction of a different type than any evaluated previously. It has been determined that a new or different kind of accident will not be possible due to these changes. The design and operating bases of the replacement spray system are consistent with and meet or exceed the requirements of the existing system. No new accidents are introduced by the new design.
3. involve a reduction in a margin of safety as defined in the basis for any Technical Specification. The margin of safety is not reduced since the replacement system serves the same purpose as the existing spray array system and the replacement design and equipment meet or exceed the original safety-related requirements of the existing service water system. The replacement system meets the single active and passive failure criteria as reported in the UFSAR. The Limiting Condition for Operation and Surveillance Requirements of the Technical Specification Sections 3/4.7.4 Service Water System and 3/4.7.5 Ultimate Heat Sink remain unchanged by these proposed modifications.

Therefore, based on the above consideration, it has been determined that these changes do not involve an unreviewed safety question as defined in 10CFR50.59.

15-MDS-692C-5

Retrieved from "https://kanterella.com/w/index.php?title=ML20210D684&oldid=3313266"