ML13198A271

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Supplement to License Amendment Request for Changes to Technical Specification 3/4.7.11, Ultimate Heat Sink.
ML13198A271
Person / Time
Site: Millstone Dominion icon.png
Issue date: 06/27/2013
From: Grecheck E
Dominion, Dominion Nuclear Connecticut
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
13-227A
Download: ML13198A271 (33)
v • d • e


Text

Dominion Nuclear Connecticut, Inc. F ii 5000 Dominion Boulevard, Glen Allen, VA 23060 min Web Address: www.dom.com June 27, 2013 U. S. Nuclear Regulatory Commission Serial No. 13-227A Attention: Document Control Desk NSSL/MLC RO Washington, DC 20555 Docket No. 50-336 License No. DPR-65 DOMINION NUCLEAR CONNECTICUT, INC.

MILLSTONE POWER STATION UNIT 2 SUPPLEMENT TO LICENSE AMENDMENT REQUEST FOR CHANGES TO TECHNICAL SPECIFICATION 3/4.7.11. "ULTIMATE HEAT SINK" By letter dated May 3, 2013, Dominion Nuclear Connecticut, Inc. (DNC) submitted a license amendment request (LAR) for Millstone Power Station Unit 2 (MPS2). The proposed amendment would modify Technical Specification (TS) 3/4.7.11, "Ultimate Heat Sink," to increase the current ultimate heat sink (UHS) water temperature limit from 75 0 F to 80°F and change the TS Action to state, "With the ultimate heat sink water temperature greater than 80 0 F, be in HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />." DNC requested approval of the LAR by May 5, 2014 with implementation within 60 days of issuance.

In a letter dated June 26, 2013, the NRC provided DNC an opportunity to supplement the LAR identified above. During a clarification call between the NRC and DNC on June 20, 2013, DNC agreed to provide the information to the NRC by July 3, 2013.

Enclosure 1 provides DNC's response to the NRC's request. The associated detailed information requested by the NRC is provided in Enclosure 2 and 3.

If you have any questions or require additional information, please contact Wanda Craft at (804) 273-4687.

Sincerely, Eugene S. Grecheck Vice President - Nuclear Engineering and Development COMMONWEALTH OF VIRGINIA COUNTY OF HENRICO ) Aco' The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Eugene S.

Grecheck, who is Vice President - Nuclear Engineering and Development of Dominion Nuclear Connecticut, Inc. He has affirmed before me that he is duly authorized to execute and file the foregoing document in behalf of that Company, and that the statements in the document are true to the best of his knowledge and belief.

Acknowledged before me this 271 day of _ _ _, 2013.

My Commission Expires: /*L! I ' CRMASIG DSLY.

Serial No. 13-227A Docket No. 50-336 Page 2 of 2 Commitments made in this letter: None

Enclosures:

1. Supplement to License Amendment Request for Changes to Technical Specifications 3/4.7.11, "Ultimate Heat Sink."
2. DNC Response for Items Al through Al0

" Attachment 1 - Calculated Heat Removal Capability

" Attachment 2 - Description of Generic Letter 89-13 Testing/Cleaning Program

3. Service Water System, Piping and Instrumentation Drawing cc: U.S. Nuclear Regulatory Commission Region I 2100 Renaissance Blvd Suite 100 King of Prussia, PA 19406-2713 James S. Kim Project Manager U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 08 C2A 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector Millstone Power Station Director, Radiation Division Department of Energy and Environmental Protection 79 Elm Street Hartford, CT 06106-5127

Serial No 13-227A Docket No. 50-336 ENCLOSURE 1 Supplement to License Amendment Request for Changes to Technical Specifications 3/4.7.11, "Ultimate Heat Sink" Dominion Nuclear Connecticut, Inc.

Millstone Power Station Unit 2

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 1, Page 1 of 2 By letter dated May 3, 2013, Dominion Nuclear Connecticut, Inc. (DNC) submitted a license amendment request (LAR) for Millstone Power Station Unit 2 (MPS2). The proposed amendment would modify Technical Specification (TS) 3/4.7.11, "Ultimate Heat Sink," to increase the current ultimate heat sink (UHS) water temperature limit from 75 0 F to 80°F and change the TS Action to state, "With the ultimate heat sink water temperature greater than 80'F, be in HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />."

In a letter dated June 26, 2013, the NRC provided DNC an opportunity to supplement the LAR identified above. The NRC requested; A) information needed for each safety related heat exchanger cooled by service water:

1) Design heat load
2) Design fouling factor
3) As-tested fouling factor
4) Tube plug allowance
5) Actual number of plugged tubes
6) Calculated heat removal capability
7) Design minimum flow rate
8) Actual flow rate
9) Vendor supplied heat exchanger specification sheet
10) Description of Generic Letter 89-13 testing/cleaning program for each heat exchanger, and B) an 18 x 24 size piping and instrumentation diagram of service water system C) a statement as to whether or not the increase in service water temperature from 75 OF to 80 °F will result in a derating of the emergency diesel generators.

DNC Response (Items Al through A10)

The requested information for items Al through Al 0 identified above, are provided in for the following service water cooled, safety-related, heat exchangers:

  • Reactor Building Closed Cooling Water (RBCCW) - X-18A/B/C

" Emergency Diesel Generators (EDG) - X-83A/B, X-53A/B, X-45A/B

  • Vital AC Switchgear Room Ventilation Coolers- X-181A/B, X-182, X-183

" Vital DC Switchgear Room Ventilation Chillers- X-169A/B

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 1, Page 2 of 2 DNC Response (Item B)

A 17 x 22 size piping and instrumentation diagram of the MPS2 service water system is provided in Enclosure 3 as Drawing No. 25203-26008.

DNC Response (Item C)

The increase in service water temperature from 75 0 F to 80°F does not require derating of the MPS2 emergency diesel generators.

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement ENCLOSURE 2 DNC Response for Items Al through A10 (Includes Attachments 1 and 2)

Dominion Nuclear Connecticut, Inc.

Millstone Power Station Unit 2

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 1 of 17 Reactor Building Closed Cooling Water Heat Exchangers Item. X-18A .. X8B :X-18C Item (Facility 1) (Facility 2)

Al) Design heat load 2.044 x10 8 BTU/hr 2.044 x10 8 BTU/hr 2.044 xl 08 BTU/hr A2) Design fouling factor (1) 0.001075 (hr-ft20.F/BTU) 0.001075 (hr.ft2 -°F/BTU) 0.001075 (hr-ft 2 f-F/BTU)

A3) As-tested fouling factor See Attachment 2, Item 5 See Attachment 2, Item 5 See Attachment 2, Item 5 M) Tube plug allowance 1637 total tubes; 1637 total tubes; 1637 total tubes; Tube plugs allowed - 163 (10%) Tube plugs allowed - 163 (10%) Tube plugs allowed - 163 (10%)

A5) Actual number of plugged tubes 15 0 65 A6) Calculated heat removal capability See Attachment 1 See Attachment 1 See Attachment 1 minimum flow rate (gpm) 7570 (LOCA) 7570 (LOCA)

A7) Design inimmforate7500 (Normal Operation) 7570 (LOCA) 7650 (Normal Operation)

Actual flow rate (gpm) 7655 (LOCA) 7735 (LOCA)

A8) Acu owraegp)7529 (Normal Operation) 7721 (LOCA) 7689 (Normal Operation)

N9) Vendor supplied specification See Figure 1 See Figure 1 See Figure 1 sheet M0) Description of Generic Letter See Attachment 2 See Attachment 2 See Attachment 2 89-13 testing/cleaning program (1) This is the total fouling factor used in the analysis of record to determine required service water flow rate.

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 2 of 17 Figure 1 Vendor Specification Sheet for Reactor Building Closed Cooling Water Heat Exchangers X-1 8A/BIC

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Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 3 of 17 Emergency Diesel Generator Heat Exchangers Jacket Water Coolers Lube Oil Coolers Air Coolers Item_

X-45A X-45B X-53A X-53B LI X-83A X-83B load~1 ) 2.823 x106 BTU/hr 2.823 xl,0 BTU/hr 2.279 x106 BTU/hr 2.279 x106 BTU/hr 2.067x106 BTU/hr at 2.067x106 BTU/hr at

1) Design heat at 2750 kW at 2750 kW at 2750 kW at 2750 kW 2750 kW 2750 kW A2) Design fouling 0.001575 0.001575 0.001575 0.001575 0.001575 0.001575 factor(2) (hr-ft12 -F/BTU) (hrft2 .°F/BTU) (hr-ft2 . F/BTU) (hr-ft2 -F/BTU) (hr-ft 2 . F/BTU) (hr-ft2 .°F/BTU)

A3) As-tested fouling See Attachment 2, See Attachment 2, See Attachment 2, See Attachment 2, See Attachment 2, See Attachment 2, factor Item 5 Item 5 Item 5 Item 5 Item 5 Item 5 110 total tubes; 110 total tubes; 188 total tubes; 188 total tubes; 110 total tubes; 110 total tubes;

4) Tube plug Tube Plugs Allowed Tube Plugs Allowed Tube Plugs Allowed Tube Plugs Allowed Tube Plugs Allowed Tube Plugs Allowed

- 5 (or 5%) - 5 (or 5%) - 9 (or 5%) - 9 (or 5%) - 5 (or 5%) - 5 (or 5%)

A5) Actual number of 0 0 1 0 0 0 plugged tubes m6)

Calculated heat See Attachment 1 See Attachment 1 See Attachment 1 See Attachment 1 See Attachment 1 See Attachment 1 removal capability

7) Design minimum 637 637 637 637 637 637 flow rate (gpm)
8) Actual flow rate 672 678 672 678 672 678 (gpm)

A9) Vendor supplied See Figure 2 See Figure 2 See Figure 3 See Figure 3 See Figure 4 See Figure 4 specification sheet A10) Generic Letter 89-13 testing/ See Attachment 2 See Attachment 2 See Attachment 2 See Attachment 2 See. Attachment 2 See Attachment 2 cleaning program (1) X-83ANB are the limiting heat exchangers, so ifthe required heat load is achieved for X-83A/B, then it will also be achieved for X-53A/B and X-45A/B.

(2) This is the total fouling factor used in the analysis of record to determine required service water flow rate.

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 4 of 17 Figure 2 Vendor Specification Sheet for Emergency Diesel Generator Heat Exchangers X-45A1B, Jacket Water Coolers BASCO 0 AMERICAN PRECISION I!9O~ W"

  • Division ) NOUSTRIES INC.

P.O. OX 21BI 2777 WALDEN AVENUE: / BUFFALO. NEW YORK 14225 7- 16-6G4-6700 TELEX: 91-395 JOB NO. P0 #B-26064-1-0 2 CUSTOMER Co].t Industries - Fairbanks Morse REFERENCE NO. . 110o6267 3 ADDRESS PROPOSAL NO. Basco 82-710085 4 PLANT LOCATION DAIE 11/11/71 5 SERVICE OF UNIT Jacket Water- Cooler ITEM NO. 03 Rev. #2 6 SIZE 12096 TYPE 7' Removable Bundle . CONNECTED IN Stacked/Top SO.FT.SURF.1UNIT IGmaS5 172 SCq.ftSHELLS/UNIT One SO.FT.SURF'/SHELL I °1.72 s .f 7

Total Total PERFORMANCE OF ONE UNIT 9 SHELL SIDE TUBE SIDE 10 FLUID CIRCULATED Jacket Water Sea Water 11 TOTAL FLUID ENTERING 400 GPM 700 GPM 12 VAPOR 13 LIQUID. 400 GPM 700 GPM 14 STEAM Is NONCONOENSABLES 16 FLUID VAPORIZED OR CONDENSED 17 ST EAM.CO NDENSE O ,_'"'

18 SPECIFIC GRAVITY/DENSITY 19 VISCOSITY ......

20 MOLECULAR WEIGHT. , .........

21 SPECIFIC HEAT BTU/LB-OF BTUFB.0F

.22 THERMAL CONDUCTIVITY BTU/HR.FT.OF BTU/HRFT.OF LATENT HEAT BTUILB _BTU/LB TEMPFRATURE IN . 1135 OF , 91.6 OF 25 TEMPERATURE OUT 167 OF 101.5 OF 26 OPERATING PRESSURE PSIG PSIG 27 NO. PASSES PER SHELL One One 28 VELOCITY FT/SEC 6.1 FT/SEC 29 PRESSURE DROP 4 _ PSI 2 PSI 30 .FOULING RESISTANCE (Min.)I .001 .0005 31 HEAT EXCHANGEO.STUIHR 3,52.*000 "MTU CORRECTED.OF 79.3 deg. F, 32 TRANSFER RATE -SERVICE 2 CLEAN CONSTRUCTION OF ONE SHELL 33 DSIGN PRESSURE 150. PSI 150 PSI 34 35 TEST PRESSURE 225 PSI 300 PSI 36 DESIGN TEMPERATURE 250. OF 200 OF 37 TUBES Aluminum Brass NO. 110 o.0. 3/.4 BWG 18 LENGTH 8 ft.. PITCH 15/16 TRI 38 SHELL Shell A53 GR B I.O. 0.0. 12." Nom. SHELL COVER (INTEG) (REMOVI 39 )5j-qXTJCHANNE-L CL. 40 ASTM A 278 CRANNEL COVER CL. 40 AST4 A 278 40 TUBSHEET -STATIONARY Al. Bronze aSTM B 1.71 TUBESHEET-FLOATING AL.Bronze ASTM B17i 41 BAFFLES- CROSS Steel. A285 GR CTYPE FLOATING HEAD COVER 42 BAFFLES -'LONG TYPE Seg. IMPINGEMENT PROTECTION 43 TUBE SUPPORTS Steel A 285 GR C 44 TUBE TO TUBESHEET JOINT Roller Expanded:

45 GASKETS Non-Asbestos Fiber I PACKING BUNA "N", .O-Rings 46 CONNECTIONS.SHELL SIDE IN 8" X 6" OUT 811 X 6" RATING Studded Domes

)j.0NkNRCHANNEL SIDE IN 6" OUT 6" RATING 150# ANSI FF CORROSIONALLOWANCE - SHELL SIDE 1/8" on C. Steel TUBE SIDE 1/8 on C. Steel 49 CODE L.OUIEMENTS: COMMERCIAL STANDARD -3 ASME SECII0N VIII,DIV. I M TEMA CLASS so lOTHER: ___ ____ _____ ____________________

51 REMARKS Stackin. assembly consisting of Items 01,. 02 and 03.

Z4S~okn. 53 __Cossi 15 ___REV. Iv

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 5 of 17 Figure 3 Vendor Specification Sheet for Emergency Diesel Generator Heat Exchangers X-53A/1B, Lube Oil Coolers I

BASCO ,0 AMERICAN PRECISION Divis ion IO. NUSTIMES INC.

P.O. E30X 21[9 / 777 WALDENM AVENUE / DUFrALO. NEW YOPI( 142--5 / 716-684-67700 / TELX 515a 2 JOB NO. PO #B-260641-0 2 CUSTOMER Colt Industries - Fairbanks Morse REFERENCE NO. 11906267 3 ADDRESS PROPOSAL NO. Basco 82-710085 4 PLANT LOCATION DATE 11/11/71 6 SERVICE OF UNIT Lube Oil Cooler ITEM NO. 02 Rev. #2 6 SIZE 16096 TYPE 7 Removable Bundle V . CONNECTED IN Stacked/Top I1 7 Sa.FT.SURFJUNIT 'NV,~'295 Sqa.'tSHELLS/UNIT One SO.FT.SURFJSHELL .o 25 s ft.

.Total Total Ta PERFORMANCE OF ONE UNIT 9 SHELL SIDE. TUBE.SIDE 10 FLUID.CIRCULATED Lube Oil SAE 40 Sea Water2 11 TOTAL FLUID ENTERING 500 GPM 700 GPM 12 VAPOR 13 LIQUID , 500 GPH 700 OPM 14 STEAM is NON-CONDENSABLES 16 FLUID VAPORIZED OR CONDENSED _

17. STEAM CONDENSED 18 SPECIFIC GRAVITY/DENSITY 19 VISCOSITY 20 MOLECULAR WEIGHT _ _'_'

21 SPECIFIC HEAT . BTU/LBOF BTU/LBOF 22 THERMAL CONDUCTIVITY BTU/HR-FT-O.F BTU/HR.FT-OF

'3 LATENT HEAT BTU/LB . BTUiL8 14 *'TEMPERATURE IN 2.15 OF 83 OF 25 TEMPERATURE OUT 189.3 Min. OF 91.6 OF 26 OPERATING PRESSURE PSIG PSIG 27 NO. PASSES PER SHELL One One 28 VELOCITY FT/SEC , .6 FT/SEC 29 PRESSURE DROP 12 Max. PSI. On PSI 30 FOULING RESISTANCE (Min-) .001 .000 31 HEAT EXCHANGE0.BTUIHR 2,890,000 MTD CORRECTED.OF 114,6 32 TRANSFER RATE - SERVICE 85,r) CLEAN CONSTRUCTION OF ONE SHELL 34 DESIGN PRESSURE 150 PSI 150 PSI 7 35 TEST PRESSURE. 225 PSI 300 PSI 36 DESIGN TEMPERATURE 250 OF 200 OF 37 TUBES Aluminum Brass NO. 1_88 o.n. 3/4 BWG18 Ave.LENGTH 8 ft. PITCH 19/16 TRI 38 SHELL Shell A53 GR. B I.D. 0.0.16"Nom. SHELL COVER (INTEG) (REMOV) 39 IMX/CHANNEL CL140 ASTN A 278 CHANNELCOVER CL 40 ASTM A 278 40 TUBESHEET-STATIONARY AL.. Bronze ASTM B17_1 TUBESHEET.FLOATING AL. B.rnz ASM 171 41 BAFFLES- CROSS Steel A285CR CTYPE Se . _ FLOATING HEAD COVER 42 BAFFLES -LONG TYPE IMPINGEMENT PROTECTION 43 TUBE SUPPORTS Steel A 285 GR C 44 TUBE TO TUBESHEET JOINT Rolle. _and 45 GASKETS Non-Asbestos Fiber [PACKING.

._____ BUNA "N", 0-HRjIg5 ...

46 CONNECTIONS.SE ELL SIDE IN 8" X 6" OUT 6,, RATING _ e 47 rn3XNX/CHANNEL SIOE IN 6" OUT 6" RATING 1504 ANSI f_ .___

CORROSIONAI..LOWANCE-SHELLSIOE 1/8" on C. SLeel TUBE SIDE 1/8" on C. Steel.

49 CODE REOUINEMENTS: COMMEFCIAL STANDARDI ASME.SECTION VIII. DIV. I0 TEMA CLASS R 50 OTHER:

51 REMARKS Stacking Assembly consistLin of Items 01, 02 and 03, 52 53 ý.I ý, ý 0 (ý, Ug-A I IRF-%J - I 54

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 6 of 17 Figure 4 Vendor Specification Sheet for Emergency Diesel Generator Heat Exchangers X-83A/B, Air Coolers I I 9oT,, *6*7 .MtWsO.

BASCO AMERICAN S 2EPRECISION 7 Division "INDUST RIES INC. l..k -/ /

p. o. BOX 218 P-7-77 WALDEN.AVENUE I BUFFALO. NEW YOR*K 14225 / 71S-684- 6-00 TELEX:'91-395 I JOBNO. PO #B-260641-0 2 CUSTOMER Colt Industries - Fairbanks Morse REFERENCEPNO. 11906267 3 ADDRESS PROPOSALNO. Basco 82-710085 4 PLANT LOCATION DATE 11/11/71 S SERVICE OF UNIT Alir Cooler Heat Exchanger ITEM NO. 01 Rev. 02 6 SIZE 12096 TYPE 7 Removable Bundle . CONNECTED IN Stacked on tin.

7 SO. FT. SURFJIUNIT,' 1NIT One SO. FT. SURF.ISHELL Ijes* !'r.

TotalTol Total 8 PERFORMANCE OF ONE UNIT S SHELL SIDE TUBE SIDE 10 FLUID CIRCULATED Water Sea Water 11 TOTAL FLUID ENTERING 400 GPH 700 GPM 12 VAPOR 13 LIQUID 400 GPM 700 ,,PM 14 STEAM 15 NON-CONDENSABLES 16 FLUID VAPORIZED OR CONDENSED 17 STEAM CONDENSED 18 SPECIFIC GRAVITY/DENSITY 19 VISCOSITY 20 MOLECULAR WEIGHT 21 SPECIFICHEAT BTU/LB.OF BTU/LB-OF 22 THERMAL CONDUCTIVITY BTU/HR-FT-OF BTUIHR.FT.OF

'3 LATENT HEAT RTUILO BTU/LB 24 TEMPERATURE.IN 134 OF 75 oF 25 TEMPERATURE OUT 120 OF 83 OF 25 OPERATING PRESSURE PSIG PSIG 27 NO. PASSES PER SHELL One On*

28 VELOCITY FT/SEC 6,- FTISEC

.29 'PRESSURE DROP c, 1 PSI 2 PSI 31 FOULING RESISTANCE (Min.) .001 .0005 31 'HEAT EXCHANGED.BTU/HR 2,769,000 MTO CORRECTED.OF 48.deg. F 32 TRANSFER RATE - SERVICE 335.4 CLEAN 33 CONSTRUCTION OF ONE SHELL 34 DESIGN PRESSURE 150 PSI ] 150 PSI 35 TEST PRESSURE. 225 PSI " 300 PSI 36 DESIGN TEMPERATURE 250 OF 200 OF 37 TUBES uminum Brass O. 110 0.'.3/4 WG 18 AVe.LENGTH 8 ft. PITCH 15/16 TRI 38 SHELL Shell A 53 GR B I.0. 0.0. 12" SHELL COVER [INTEG) (REMOV) 39 BW*=T/CHANNEL CL. 40 ASTM A 278 CHANNEL COVER CL 40 ASTH A 278 40 TUBESHEET - STATIONARY AL Bronze ASTM B171 TUBESHEET - FLOATING AL Bronze ASTM B171 41 BAFFLES-CROSS Steel A285 GC CTYPE Se. FLOATING HEAD COVER 42 BAFFLES'- LONG TYPE IMPINGEMENT PROTECTION 43 TUBE SUPPORTS Steel A285 GR C 44 TUBE TO TUBESHEET JOINT Roller pde 45 GASKETS Non-Asbestos Fib r }PACKING BUNA "N", O-Rings 46 CONNECTIONSSSHELL SIDE. IN 8" X 6" OUT .8" x 6" RATING Studded Domes 17 O8GM/CHANNEL SIOE IN 6" OUT 6" RATING 150# ANSI FF

.8 CORROSION ALLOWANCE -SHELL SIDE 1/8" on C. Steel TUBE SIDE 1/8" on C. Steel 49 CODE REOUIREMENTS: COMMEACIAL STANOARD C. ASMESECTION VIII.0IV I 'X' TEMA CLASS R

50. OTHER:

51 REMARKS Stacking assembly consisting of Item 01, 02 and 03 52 53' IZE,4. I

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 7 of 17 Vital AC Switchgear Room Ventilation Cooler Heat Exchangers West 480 Volt Load Center Lower 4160 Volt Upper 4160 Volt Item X-181A X-181B X-182 X-183 Al) Design heat load 249,744 BTU/hr (LOCA) - total for both 131,253 BTU/hr (LOCA) 121,536 BTU/hr (LOCA) 194,172 BTU/hr (Seismic) - total for both 131,253 BTU/hr (Seismic) 93,949 BTU/hr (Seismic)

A2) Design fouling factor (1) 0.040102 (hr-ft2 .°F/BTU) 0.040102 (hr.ft20- F/BTU) 0.040102 (hr-ft 2.°F/BTU) 0.040102 (hr-ft2.F/BTU)

A3) As-tested fouling factor See Attachment 2, Item 5 See Attachment 2, Item 5 See Attachment 2, Item 5 See Attachment 2, Item 5 A4) Tube plug allowance(2) 12.5% (2 of 16 tubes per row, 4 rows per coil, 3 coils) 13.6% (3 of 22 tubes per row, 4 13.6% (3 of 22 tubes per row, 4 rows) rows)

A5) Actual number of plugged 0 0 0 0 tubes

6) Calculated heat removal See Attachment 1 See Attachment 1 See Attachment 1 See Attachment 1 capability A7) Design minimum flow rate 60 (LOCA) 30 (LOCA) 15 (LOCA) 17 (LOCA)

(gpm) 26 (Seismic) 13 (Seismic) 15 (Seismic) 10 (Seismic) 92 (LOCA) 53 (LOCA) 34 (LOCA) 29 (LOCA)

8) Actual flow rate (gpm) 76 (Seismic) 44 (Seismic) 28 (Seismic) 23 (Seismic)

A9) Vendor supplied See Figure 5 See Figure 5 See Figure 6 See Figure 5 specification sheet A10) Generic Letter 89-13 See Attachment 2 See Attachment 2 See Attachment 2 See Attachment 2 testing/cleaning program (1) This is the total fouling factor used in the analysis of record to determine required service water flow rate.

(2) X-181 consists of three identical coils; two coils comprise X-181A, while one coil comprises X-181B.

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 8 of 17 Figure 5 Vendor Specification Sheet for Vital AC Switchgear Room Ventilation Cooler Heat Exchangers X-181A/B and X-183 CAirC NO.12-280 J V 0 0o' PAE 11 22 ZACHRY ZACHRY NUCLEEA, INC.

o T'I

.... v-, nra PROTO-HX Model Developmont of MP2 Room Coolers X-1lA/B and X-183 and Evaluation of 801F Service Water ZN! DocuMent Type: UAPD 4.0 DESIGN INPUTS 4.1 Physical configuration data for coolers X-181 and X-183 are provided In Reference 9.2 as summarized in Table 1.

Table 1: Physical Configuration Data Cooler Parameter I X-181 1 X-183 Coils per Unit 3P 1 Coil Length (in) 80 51 Serpentines 11b) 1M)

Fin Pitch (fins per in) 9(-) 9'.)

Fin Conductivity (Btu/hr-ft-'F) 128.3 128.3 Fin Thickness (in) 0.0085 0.0085 Tube Rows 4 4 Tubes per Row 16 22 Tube Inner Diameter (in) 0.55 0.55 Tube Wall Thickness (in) 0.049 0.049 Tube Outside Diameter 0.648:') 0.648'"1 Longitudinal Tube Pitch (in) 1.5 1.5 Transverse Tube Pitch (In) 1.5 1.5 Tube Conductivity (Bturhr-tt-°F) 25.8 25.8 Table 1 Notes (a) Room cooler X-181 consists of three identical coils. Ihe PROTO-HX model is based on data for one coil. Heat transfer rates are multiplied by three to provide an equivalent cooler duty.

(b) The number of serpentines is the number of water circuits (16 for X-t81 and 22 for X-183) divided by the number tubes per row (Referenre 9 4).

(1) PROTO-HX requires the in pitch to be specified in fins per inch. The vendor data sheet contained in Reference 9.2 states that the coils have 108 tins per toot which is equivalent to 9 fins per inch.

(d) The vendor data sheet contained in Reference 9.2 provides tube wall thickness and tube inner diameter. PROTO-HY requires tube wall thickness and trihe routsidediameter The tube outside.

diameter is calculated as the tube inner diameter plus two times the tube wall thickness.

4.2 The conditions used to benchmark the models of room coolers X-1 81 and X-1 83 are provided in Attachment B of Reference 9.2 and are summarized in Table 2.

Form: NO301 F05 Revision: 00-00 Date: 10-28-2011 Page I of 1

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 9 of 17 (ALCNO 12-280 REV 0 12 22 ZACHRY NUCLEAR,INC. TI.E PROTO-HX Model Development of MP2 Room Coolers X-181NB and X- 183 and Evaluation of 80 IF Service Water ZN1Document Type: OAPD Table 2: Model Benchmark Conditions Cooler Parameter X-181 X-183 A!ir Flow (scfm) 6,1001'1 6,000 Air Flow (acfm) 6,2990) .6,197 Inlet Dry Bulb Temperature (OF) 104.0 104.0 Inlet Wet Bulb Temperature (OF) 58.36 58.36 Outlet Dry Bulb Temperature F) 86.51 86.57 Outlet Wet Bulb Temperature (IF) 51.29 51.32 Atmospheric Pressure (psla) 14.7 14.7 Colt DP (in WC) 0.6742t") 0.5010t"J Tube-Side Fluid Seawater Seawater Tube Flow (gpm) 26.671') 25.00 Tube Inlet Temperature (IF) 75 75 Tube Outlet Temperature (IF) 83.86 84.26 Air-Side Fouling (hr-fte-°F/Btu) 0.0000 0.0000 Tube-Side Fouling (hr-fte-rF/Btu) 0.0005 0.0005 Colt Heat Duty (Btu/hr) 1 1 5 , 5 0 0 ") 113,200 Table 2 Notes (a) Room cooler X-181 consists of three identical coils. Flow rates listed are per coil.

(b) PROTO-HX requires coil pressure drop to be specified in units of psi. The pressure drop specified in Reference 9.2 is converted to psi using the conversion factor given in Design Input 4.11.

(c) Cooler heat duty Is per coil.

4.3 The conditions used to validate the benchmarked models of room coolers X-181 and X-183 are provided in Attachment C of Reference 9.2 and are summarized in Table 3.

Date: 10-28-2011 Page 1of I N0301F05 Form: N0301 Revision: 00-00 Date: 10-28-2011 Page 1 of I Form: F05 Revision: 00-00

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 10 of 17 Figure 6 Vendor Specification Sheet for Vital AC Switchgear Room Ventilation Cooler Heat Exchanger X-182

'I Dominion Calculation 11-ENG-X182-04341 M2 Rev. 0 Page 11 PERFORMANCE VERIFICATION

-for-AEROFIN TYPE "R" COIL CA-1505, Rev. 3 November 18, 2010 JOB NAME: Millstone Generating Station Unit 2 EQUIPMENT: X-182 for Lower 4160V Vital Switchgear Emergency Cooling System CUSTOMER: Dominion Nuclear Connecticut, Inc.

PO NUMBER: 45652669.

AEROFIN SO# 093814 Prepared By:

  • Date:

Verified By: ~ Date:

Approved By: Date: /6 ý2 '0 Pg I of 29

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 11 of 17 Dominion Calculation 11-ENG-X182-04341M2 Rev. 0 Page 15 AEROFIN CALCULATION FILE CA-1505

Purpose:

.0 The purpose of this report is to verify the heat exchanger performance for Millstone Generating Station Unit 2 as specified in Specification SP-M2-ME-1092 Revision 0; for coil X-182 for the Lower 4160V Vital Switchgear Emergency Cooling System (ESV) for Dominion Nudlear Connecticut, Ino, P.O. 45652669.

Heat Exchanger Coil Size 34.5" Casing Height 59.0" Fin Length 5 Row 4 Pass 12 PPI Aluminum "L", 0.012" Nominal Thk 5/8" x 0.049" Nominal Wall AL6XN The performance verifications in this report are based on one (1) coil of each size, as above, piped in counter flow of air and water for optimum performance.

The thermal resistance values for the plate fin surface are based on test results in accordance with ARI Standard 410, "Forced Circulation Air-Cooling and Air-Heating Coils".

Page 5 of 29

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 12 of 17 Dominion Calculation 11-ENG-X182-04341 M2 Rev. 0 Page 39 AEROFIN CALCULATION FILE CA-1505 Performance Verification, continued Millstone Unit 2, X-182, Case 5 Ao = Total External Surface, ft2 D = Ao/Fa/Row = 1.8

  • fpi + 1.4 (for helical fin configuration provided)

D= 1.8

  • 12 + 1.4 23.0 K=D/R K- 23/0.145 = 159 Btu/f?2 -Fa/Row/°F Re = Rows Calculated = Q / (Fa
  • K
  • Atm)

Re = 198,974 / (12.482

  • 159
  • 22.5) 4.46 Because the rows calculated for the Case 5 heat load of 198,974 Btu/hr (whichis based upon coil performance with water as the cooling medium and zero fouling) equals the rows calculated for the Case 1 design condition (which is based upon coil performance with seawater as the cooling medium and the design fouling factor), the heat load calculated for Case 5 (198,974 Btu/hr) is the basis used for expected minimum capacity for coil performance at the design temperatures and flowrates. The performance capacity test conducted at Intertek on 20 September2010 yielded a cooling capacity (heat load) of 199,217 Btu/hr which validates that the cooling coil will perform as predicted and will satisfy the design performance requirements as specified.

Page 29 of 29

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 13 of 17 Dominion Calculation 11-ENG-X182-04341M2 Rev..0 Page 41 Intertek Report No.: 100208395CRT-(001 Description of Test Setup The test sample was installed with interconnecting ducts Into a open-loop, air-flow measuring apparatus. The quality of the air entering and leaving the coil was determined by wet and dry-bulb Precision RTD's located in aspirating-type psychrometer samplers, each located at the inlet and outlet of the test coil.

The quality of water entering and leaving the coil was determined by Precision RTD's located in thermometer wells. The quantity of water was measured by Emerson Mass Flowmeters.

Description of Sample, Physical and Nameplate Data

1. General Description of Sample The sample was a aluminum-firmed cooling coil with AL6XN tubing. The coil was installed in a vertical position and air entered horizontally into the inlet side, and -dischargedfrom the opposite side.

The water entered the coil at approximately the bottom of the inlet header, and exited from approximately the top of the outlet header.

2. Physical Data of Coil Transfer Fluid Water Tubing Characteristics Position Horizontal Arrangement Staggered Nominal diameter, in O.D. 5/8" Material AL6XN Spacing (nominal), in 1.39" FC x 1.28" RC Tubeface 22/23 Circuit 1.25 Total Number of Tubes 113 Coil Depth (in rows of tubes) 5 Fin Characteristics Type Helical "U' Material Aluminum Fins per Inch 12 Casing Height, in 34.5" Nominal Tube Length, in 59.0" Page 2 of 6 AEROFIN CALCULATION FILE CA-1 505

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 14 of 17 Dominion Calculation 11-ENG-X182-04341M2 Rev. 0 Page 46 Date: 10/14/2010 Job Name: Millstone Unit 2 System ID: Case I (Now Design)

QtyF. NIL Model No. In Face INCH R-12:0AL-36.1 X 59.0-5-1.25 1 59.00 Totals: I Cell Type: R Tube: 0.625 inchX 0.049 inch TF: 22 Fln Material 3/8 High Aluminum V Thickness: 0.011 IN.

Row: 5 CogMalerlal: Standard with Galvanized Casings Fin: 12.00 IN Connection: (1) 21 Flanged Stainless StN150 lb RFSO Circuit: 1-1/4 ,, Hdr Material: Standard Stainless Stl with Rolled Joints Rows Cale: 4.46 Dwg: NA Perfemanee NV Pressure: 29.92 INHG Elevation: SeaLevel Airflow. 7.200.0 LVG ACFM Sea Water System Face Arear 12.5 FTP FlowRato: 22.90 GPM Standard Face Vqlocity: 547.6 FPM Entering Tamp: 77.0 *F Entering Dry Bulb Temp: 122.0 OF 93.5 W Tube Velocity; 1.2 FPS 0 0 Leaving Dry Bulb Temp: 97.4 F inside Surface Fouling: 0.0016 HR.FTh°F/BTU 2

Outside Surface Fouling 0.0000 IR.FT OF/BTU Sensible Heat Load: 182.0 MWH Total Heat Load: 182.1 MEH Lospes.

AirFriction: 0.50 INB20 PressurmDrop: 0.9 FTH20 Comments:

Notes & Warnings:

96 You have selected a connection size smaller than the standard.

51 Outside the scope of AHR standard 410.

29 Fluid propirties: SG: 1.025 VI: 0.88 eP "M. 0.34 Btu/tr-Ft' IF Cp: 0.94 Btu/lb *F 12 Circuit may not be available for coil type selected.

11 Special circ. requires fieetional tubes led. Contact Home Office.

7 Non standard circuit; special pricing/lead time required.

4 Coil 1 has a non standard tube face; spec*al pricong/lead time required.

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Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 16 of 17 Vital DC Switchgear Room Ventilation Chiller Heat Exchangers Item X-169A X-169B Al) Design heat load 244,096 BTU/hr 244,096 BTU/hr A2) Design fouling factor (1) 0.002702 (hr.ft2 0- F/BTU) 0.002702 (hr-ft 2 -°F/BTU)

A3) As-tested fouling factor See Attachment 2, Item 5 See Attachment 2, Item 5 A4) Tube plug allowance 10% (4 tubes) 10% (4 tubes)

A5) Actual number of plugged tubes 0 0 A6) Calculated heat removal capability See Attachment 1 See Attachment 1 A7) Design minimum flow rate (gpm) 26.9 26.9 A8) Actual flow rate (gpm) 30.1 30.1 A9) Vendor supplied specification sheet See Figure 7 See Figure 7 Al0) Generic Letter 89-13 testing/cleaning See Attachment 1 See Attachment 1 program (1) This is the total fouling factor used in the analysis of record to determine required service water flow rate.

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Enclosure 2, Page 17 of 17 Figure 7 Vendor Specification Sheet for Vital DC Switchgear Room Ventilation Chiller Heat Exchangers X-1 69A/B

_____ ____Xý-iA 1* PAGE NO. ,

CALCULATION NO. 'oZBA?-A A REV. NO.

AFER DIVISION 2300 H. MARSHAl LL DR. GRAF RIE, TX 75053-40C 1214) 647-2626 P.O. BOX 5340004 GRAND PRAIRIE, TX 75053-40C

/ TLX 73-0994 CABLE: AKTEK Lf

- FAY.flflflAAE.fl prcA..iU,%dILL'JLY I "JOB 2 CUSTOMER NORTHEAST UTILITIES REF HU-67652 3 ADDRESS INO 4 PLANT LOC DATE 15 DEC-1987 5 SERVICE R-22 ITEM 6 SIZE 8-BX-54 TYPE AMFC-4-40-CB 7 SURFACE/UNIT 110.5 TOTAL I SHELL/UNIT SURFACE/SHELL 102.9EFF 8 PERFOP~MNCE OF ONE UNIT 9 SHELL SIDE TUBE SIDE 10 FLUID CIRCULATED R-22 A SEA WATEP 11 TOTAL ENTERING LB/HR A 41 GPM 12 VAPOR A 13 LIOUID A 41 '3PM 14 STEAM A 15 A 16 , A 17 VAPOR CONDENSED A 18 GRAVITY

  • 1.0 19 VISCOSITY *A * .5 CP 20 MOLECULAR WT-VAPORS A A 21 SPECIFIC HEAT .. A 1.0 BTU/LB 22 LATENT HEAT VAPORS A BTUILB A BTU/LB 23 TEMPERATURE IN :Z0 DEG F 4 ")5 DEG F 24 TEMPERATURE COND/OUT A 105.OC.T./102 A 86.6 DEG F 25 OPERATING PRESSURE
  • PSG A 20 PSIG 26 NUMBER OF PASSES A 1 A 4 27 VELOCITY A FT/SE. A 5.6 FTISEC 28 PRESSURE DROP A PSI 4.7 PSI 29 FOULING TOTAL - .0005 A .001 30 THMUIAL CONDUCTIVITY A A 31 HEAT EXCHANGED-BTUiHR 237600 MTD (CORRECTED, 23.73 DEG F 32 TRANSFER RATE-SERVICE 97.3 CLEAN 180.3 33 CONSTRUCTI oN 34 DESIGN PRESSURE A 350 PSI A 150 PSI 35 TEST PRESSURE A 437 PNU PSI A 225 FSI 36 DESIGN TEMPERATURE A 250 DEG F - *00 DEG F 37 TUBES 90/1.0 CU-flX,26F/r NO 40 OD .75 TK 0.049* LEN 54" .9375 TRI 38 SHELL CARBON STEEL ID OD 8.625 TKN 39 SHELL COVER FLOATING HEAD 40 CHANNEL: CAST BRONZ CHANNEL COVER 41 TU SH--STAT 90/10 CU-NI FLOATING 42 RAF--CROSS TYPE SEGMENT TKN 43 BAF--LONG TYPE - TEN 44 TU SUPPORTS C.9- TKN 45 GASKETS BLACK RUBBER 46 CONN-SHELL-IN OUT SERIES ODF SWEAT 47 CHANNEL-IN : 2 OUT 2 SERIES NPT 48 CORROSION ALLOW-SHELL SIDE TUBE SIDE 49 CODE REOUIREMENTS ASHE CODE SECTION VIII DIV I "O" STAMP 50 HEIGHT-EACH SHELL LB BUNDLE NA FULL OF HATER 51 NOTE--(SR) OR (XR) AFTER ANY PART - STRESS RELIEVED OR RADIOGRAPHED 52 REMARKS-

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement ATTACHMENT 1 Calculated Heat Removal Capability Dominion Nuclear Connecticut, Inc.

Millstone Power Station Unit 2

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Attachment 1, Page 1 of 1 Calculated Heat Removal Capability Service water cooled heat exchanger calculations (using Proto-HX TM ) use the design heat load (or an assumed heat load greater than the design) and fouling factor, the heat exchanger characteristics (geometry, tube plugging limits, materials, etc.), process side parameters, and temperature of the sea water to determine the required seawater flow rate.

The service water system flow calculation (using Proto-floTM) then determines the available flow. Therefore, there is no separate calculated heat removal capability - it's the same as the design heat load. The difference between the required flow and the available flow demonstrates the margin. Additional margin exists in the difference between the actual number of tubes plugged and the plugging allowance and the difference between the actual service water pump performance and the assumed degraded pump in the flow analysis.

While these numbers can change over time, they are monitored to ensure that equipment is repaired or replaced before the margin is significantly challenged.

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement ATTACHMENT 2 Description of Generic Letter 89-13 Testing/Cleaning Program Dominion Nuclear Connecticut, Inc.

Millstone Power Station Unit 2

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Attachment 2, Page 1 of 3 Description of Generic Letter 89-13 Testing/Cleaning Program Generic Letter (GL) 89-13 Elements Five elements/items were required by GL 89-13. They are summarized below:

1) Implement and maintain an ongoing program of surveillance and control techniques to significantly reduce the incidence of flow blockage problems as a result of biofouling. This program includes:
a. Inspect the intake structure for macrofouling due to organisms, sediment and corrosion. Remove fouling accumulations.
b. Continuously chlorinate the service water system.
c. Flush and flow test infrequently used cooling loops and fill stagnant loops with chlorinated water prior to layup.
2) Conduct thermal performance testing of safety related heat exchangers to verify design heat transfer capability.
3) Perform routine inspection and maintenance on piping and components to ensure that corrosion, erosion, protective coating failure, silting and biofouling cannot degrade the performance of safety related systems cooled by service water. This program should include:
a. Remove excessive accumulations of biofouling agents, corrosion products and silt.
b. Repair defective coatings and corroded service water system piping and components that could adversely affect a safety related function.
4) Confirm the service water system will perform its intended function per the licensing basis for the plant.
5) Confirm that maintenance practices, operating and emergency procedures and training that involve the service water system are adequate to ensure that safety related equipment cooled by the service water system will function as intended and that operators of this equipment will perform effectively.

DNC Response Millstone Power Station Unit 2 (MPS2) complies with GL 89-13 as follows. Note that item numbers below correspond to the requirements of GL 89-13 listed above.

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Attachment 2, Page 2 of 3 Item 1:

a. The intake structure is inspected annually using divers and videotape during the annual intake bay outages in the winter.
b. The service water system is continually chlorinated by injecting hypochlorite through individual pumps to the service water pump suction bells. Automatic hypochlorite isolation is provided on strainer blowdown. Operations is procedurally driven to notify System Engineering if hypochlorite is suspended for more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Regularly scheduled heat exchanger flow (e.g., differential pressure across a flow orifice) versus differential pressure (d/p) surveillances (i.e., difference between the pressure upstream and downstream of the heat exchanger) ensures that system components are not clogged.
c. The service water system at MPS2 has two loops which are continually in service to all safety related heat exchangers, except for the emergency diesel generator (EDG) and vital chiller heat exchangers. Spare heat exchangers are provided in both the reactor building closed cooling water (RBCCW) system and the turbine building closed cooling water system. The spare heat exchangers are maintained in fresh water layup. Layup of heat exchangers require components to be placed in fresh water layup if they are idle for greater than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. Removing the salt water significantly reduces the possibility of fouling and thus additional chlorination is not needed. Trickle flow is provided to the EDG and vital chiller heat exchangers at times when they are not in service, and not in fresh water layup, to prevent fouling.

Item 2:

Heat exchanger capability at MPS2 is verified through frequent regular maintenance of the heat exchangers in lieu of testing. Heat exchangers are cleaned in accordance with the preventative maintenance program at regular intervals. In addition, periodic flow versus d/p surveillances for each heat exchanger, are performed. Results are trended and adverse trends can lead to increased cleaning frequencies.

Service water-cooled, safety-related heat exchangers were tested per commitments made in Northeast Utilities (NU) letter B15696, dated June 21, 1996 (Reference 1). Thermal performance tests were completed before and after cleaning on the RBCCW heat exchangers, EDG heat exchangers, switchgear coolers, and vital chillers. These tests validated that existing cleaning frequencies for the service water-cooled, safety-related heat exchangers maintain the capability to remove the design heat load under design limiting conditions.

Item 3:

Inspection and maintenance of service water system components includes direct visual examination of accessible piping and heat exchangers, inspection by remote camera of piping, components and heat exchangers (as needed), and cleaning and eddy current testing of heat exchangers. The results of the inspections determine the necessary maintenance on the affected components so that the safety-related function of the service water system is maintained. Safety-related piping is inspected on a one loop per outage frequency. Heat

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement Attachment 2, Page 3 of 3 exchangers are inspected on varying frequencies in accordance with the preventative maintenance program as discussed in Item 2.

Item 4:

The ability of the service water system to perform as licensed has been confirmed and reported in NU letter B14389, dated June 18, 1993 (Reference 2). Frequent regular maintenance of heat exchangers, as well as control over design changes (including analyses and tests to verify the design), ensure the system will continue to perform, as licensed.

Item 5:

Maintenance practices, procedures, and training all have been confirmed to adequately ensure that service water cooled equipment will perform as designed and that operators will operate the equipment effectively to maintain the safety-related function of the system.

The thermal performance tests described above in item 2 were used to determine a rate of change of fouling factor with respect to time to determine the adequacy of the cleaning frequency. There is, therefore, no direct correlation between the tested and the design fouling factors.

References

1) Northeast Utilities Letter B15696 to NRC, "Millstone Nuclear Power Station, Unit No. 2, Service Water System - Generic Letter GL 89-13, Update to the GL 89-13 Response (TAC No 74026)," dated June 21, 1996
2) Northeast Utilities Letter B14389 to NRC, "Millstone Nuclear Power Station, Unit No. 2, Service Water System - Response to Generic Letter 89-13 (TAC No. 74026)," dated June 18, 1993.

Serial No 13-227A MPS2 Ultimate Heat Sink Supplement ENCLOSURE 3 Service Water System Piping and Instrumentation Drawing Dominion Nuclear Connecticut, Inc.

Millstone Power Station Unit 2

THIS PAGE IS AN OVERSIZED DRAWING OR FIGURE, THAT CAN BE VIEWED AT THE RECORD TITLED: DOMINION NUCLEAR CONNECTICUT INC.

MILLSTONE POWER STATION, PIPING & INSTRUMENT DIAGRAM CIRCULATING WATER DRAWING NO. 25203-26008 WITHIN THIS PACKAGE...

D-01

THIS PAGE IS AN OVERSIZED DRAWING OR FIGURE, THAT CAN BE VIEWED AT THE RECORD TITLED: DOMINION NUCLEAR CONNECTICUT INC.

MILLSTONE POWER STATION, PIPING & INSTRUMENT DIAGRAM SERVICE WATER DRAWING NO. 25203-26008 WITHIN THIS PACKAGE...

D-02

THIS PAGE IS AN OVERSIZED DRAWING OR FIGURE, THAT CAN BE VIEWED AT THE RECORD TITLED: DOMINION NUCLEAR CONNECTICUT INC.

MILLSTONE POWER STATION 2, PIPING & INSTRUMENTAL DIAGRAM SERVICE WATER TO VITAL AC SWITCHGEAR COOLING COIL AND AC CHILLERS DRAWING NO. 25203-26008 SH,3 WITHIN THIS PACKAGE...

D-03X

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