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| number = ML20087B272 | | number = ML20087B272 | ||
| issue date = 06/28/1994 | | issue date = 06/28/1994 | ||
| title = EDG Run Time | | title = EDG Run Time | ||
| author name = Halleck R, Komosky G, Stadnick S | | author name = Halleck R, Komosky G, Stadnick S | ||
| author affiliation = NORTHEAST UTILITIES SERVICE CO. | | author affiliation = NORTHEAST UTILITIES SERVICE CO. | ||
Latest revision as of 03:38, 16 April 2020
| ML20087B272 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/28/1994 |
| From: | Halleck R, Komosky G, Stadnick S NORTHEAST UTILITIES SERVICE CO. |
| To: | |
| Shared Package | |
| ML20087B268 | List: |
| References | |
| 94-ENG-1095M2, 94-ENG-1095M2-R, 94-ENG-1095M2-R00, NUDOCS 9508070382 | |
| Download: ML20087B272 (34) | |
Text
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.. .a Page 1 of 13 .
Calculation No: 94-ENG-1095M2 Revision No: 00 ,
Title:
Millstone Unit 2 - Emereency Diesel Generator htun Time Building / System / Component Code: System No. 2346A QA Category: oA Cat i , b Total Pages: 13 Total # of Alphanumeric Revision Pages: 0 Total # of Attachment Pages: 7 (Al - A7) l Total # of Appendix Pages: 14 (API - AP14) Total # of Document Pages: 34 9 Responsible Discipline: Mechanical Reviewing Method: [ Full Revie h 7artial xeview (Non-QA only) Alternate Review Prepared by: W N Date: b L~i Gsry E. omos}ty Reviewed by: M
- M Date: b TA * '
Richard J. Halleck Reviewed by: M Date: 4 F!9M
/
Steve L. Stadnick ', ' 1. [s Approved by! Date: Ui ' d Rik W. Wells 9508070392 950001 fDR ADOCK 05000336 Quality Software Used and Rev. #/ Level: None Date CTP Data Entered: Sections waived per Section 2.0 (non-QA enly): None
. - - . - e
i.. . ce4m wo ' 'RTHEAST UTILITIES SERVICE COMPAhi sUBJE CT Millstone Unit 2 - Ecernency Diesel ny b[M DATE h "4:7h9
- Generator Fun Time. NP/9M CHKD.BY- DATE
/
C ALC. N O. 94-ENG-1095M2 a g y, 00 5HEET NO. 1 0F. b __ Table of contents Section Pace 1.0 ANALYSIS OBJECTIVE............................ 3 2.0 DESIGN INPUTS................................_,_. 3 . _ _ . 3.0 A S S UM P'i'I O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.0 METHOD OF CALCULATION......................... 4 5.0 ANALYSIS...................................... 5 6.0
SUMMARY
OF RESULTS............................ 9
7.0 REFERENCES
.................................... 10 8.0 ATTACHMENTS................................... 10 8.1 NU Memo NE-93-SAB-48...................Al 8.2 DEMA Standard Practices................A5 I B.3 LPSI Pump Curve........................A7 9.0 APPENDICES.................................... 10 9.1 Colt Eng Report R5.08-0545............ API 9.2 NU EDG Loading Calculation............AP6 9.3 EDG Loading Timeline Assumptions.....AP10 9.4 Curve of Efficiency vs Load..........AP14 .
L d r
.- , roun wo i .THEAST UTILJTIES SERVICE COMPM SU BJE CT Millstone Unit 2 - Emergency Diesel
~
By hk oATE hM Generator Run Time. _.CHKD.SY DATE 8 9 - l C ALC. N O. 94-ENG-1095M2 p iv, on 5HE ET NO. OF-l l l 1.0 ANALYSIS OBJECTIVE l To determine the length of time that the Emergency Diesel Generators (EDG) can operate during a LOCA with a loss of normal power and 24,000 gallons of fuel oil available. This calculation shall be performed utilizing the updated electrical loading calculation, the fuel consumption rates as provided by the manufacturer, and the updated LOCA event timing as provided by the Safety Analysis Branch. 2.0 DESIGN INPUTS 2.1 NU Calculation No. PA 79-126-1027-E2, Rev. O, MP2 EDG Loading Calculation. - - 2.2 NU Calculation No. 78-713-52GM, dated 2/14/78, MP2 Boron Precipitation LPSI Hot Leg Injection. 2.3 Coltec Engineering Report R5.08-0545, dated 12 93, Northeast Nuclear Energy Co. - Millstone 2 - Fuel Consumption Rates for Millstone 2 0.P. Diesel Generator Sets. Provided in Appendix 9.1. 2.4 NU Memo NE-93-SAB-248, to GE Komosky from DA Bajumpaa, dated June 1, 1993, Transmittal of LOCA Event Timing for Millstone 2 Diesel generator Fuel Oil Capacity Calculations, Attachment 8.1. 2.5 Bechtel Calculation 2Q00-1, by RD Dove, dated 5/28/74, Sizing the Emergency Diesel Generator Supply Tanks. 2.6 - Standard Practices for Low and Medium Speed Stationary Diesel and Gas Engines, Sixth Edition, Copyright 1972, Diesel Engine Manufacturers Association. Provided as Attachment 8.2. 2.7 Specification No. 7604-M-160, Rev. 7, Specification of Emergency Diesel Generators for Millstone Unit 2. i
.o .- . em m h_,(THEAST UT14 TIES SERVICE COMPAh. sus >ECT Millstone Unit 2 - E=ergency Diesel
~
sy bh DATE b l Gqnerator Run Time. - - - ' CHKD.BY DATE 94 ~~ ~ l C ALC. N O. 94-ENG-1095M2 R E v. 00
$HEET NO. OF-3.0 ASSUMPTIONS 3.1 Vortexing within the Day Tanks is not considered l based on the following.
Fuel flow to one EDG has been measured at a flowrate of approximately 4.35 gal / min when the EDG is fully loaded. During the LOCA with an LNP the two day tanks are cross-connected. Therefore, the fuel flow out of each tank would be halved, or 2.18 GPM. Per the results of Reference 7.2, vortexing does not occur until a flowrate of approximately 2 GPM and does not have any significant-impact on available fue1 ~at a flowrate as high as 3.5 GPM. Based on the low fuel flowrate observed at full load, vortexing is not considered to be a concern. 3.2 Two EDGs operate for 1 hour, then one EDG operates for an additional 167 hours ~ . 3.3 The fuel level in the two Day Tanks is at the Tech Spec Minimum or 132 inches; this level equates to 12,000 gallons of fuel per tank or a total of 24,000 gallons. 3.4 EDG electrical loading is based on the MP2 EDG loading calculation, Design Input 2.1; a copy of the loading sheets are provided in Appendix 9.2. The "B" EDG was used because its loading is slightly higher than the "A" EDG. 3.5 The assumptions made to create the new EDG loading timeline profile are found in Appendix 9.3. 3.6 Per Operating' Procedure SP 2613E-1, diesel fuel oil can be accegted with an API gravity within the range of 28 to 380 ._ As recommended by the Engine Manufacturer in Appendix 9.1, the lightest fuel expected should be used; in this case, an API gravity of 38 shall be used. Also, the Engine Manufacturer recommends using the expected high heating value of the fuel as it will have the lowest energy content on a volume basis; in this case g per Table 4 of Attachment 8.2, the High Heating Value for an API gravity of 38 0 is 19,680 i Btu /lb and 137,000 Btu / gallon. 4.0 METHOD OF CALCULATION The fuel consu=ption calculations were performed using standard equation and conversions. The equations were i performed by hand.
.1
T , i soon s.co 6.JTHEAST UTILJTIES SERYlCE COMPAh. susject Millstone Unit 2 - Emergency Diesel
~
sy hbh DATE E7!9 Generator Run Time. -
* ' ' ~ ~ ~ ~ ~
cHKo.'sY $ T E' =2 94 CALC. NO. 94-ENG-1095M2 itEvl 00 SHEET NO. OF 5.0 ANALYSIS 5.1 Determine the new EDG loading timeline profile: Adjusted Event Load Initial full load: , 2616 KW After 1 minute: 2558 KW
- motor operated valves OFF (-58 KW)
After 30 minutes: 2554 KW, _ _ , _ . .
- EDG starting air compressor OFF (-4 KW)
^ ^
After 72' minutes: 2253 Kh
- LPSI pump OFF (-301 KW)
After 90 minutes: 2495 KW
- Instrument Air Compressor ON (+66 KW)
- Turbine Auxiliaries ON (+88 KW)
- Spent Fuel Pool Cooling ON (+13 KW)
- Hydrogen Recombiner ON (+75 KW)
After 132 minutes: 2284 KW I
- Charging Pumps (2) OFF (-158 KW) )
- Boric Acid Pumps (2) OFF (-44 KW) 1
- Boric Acid Tank Heaters OFF (-9 KW)
After 5.5 hours: 2196 KW
- Turbine Auxiliaries OFF (-88 KW)
After 8 hours: 2364 KW
- LPSI Pump ON (+168 KW)
After 10 hours: 2075 KW
- Auxiliary Feed Pump OFF (-289 KW)
After 53 hours: 1914 KW
- Containment Spray Pump OFF (-161 KW) l
% s t '* ' h..<THEAST UTILITIES SERYlCE COMPAN tomt m sus >ger Millstone Unit 2 - Emergency Diesel ny h$ oATg L7 N Generator Run Time. CHKo.~iy" d Y '
oATE hd N ~
- CALC.NO.94-ENG-1095M2 a g y, on 5HEET NO. b OF 5.2 Determine the Fuel Consumption Rate for each of the loads identified in the timeline profile generated in section 5.1:
Time Load Iff Gross H]iE Fuel Cons (KW) Load (lbs/hr) 0 - 1 min 2616 96.462 2712 3635 1395 1 - 30 min 2558 96.449 2652 3555 1372 30 - 72 min . 2554 96.447 2648 3550 1370 72 - 90 min 2253 96.315 2339 3136 1236. . 90 - 132 min 2495 96.426 2587 3468 1341 , 132 m - 5.5 hr 2284 96.335 2371 3178 1250 5.5 - 8 hrs 2196 96.280 2281 3057 1210 8 - 10 hrs 2364 96.370 2453 3288 1285 10 - 53 hrs 2075 96.210 2157 2891 1156 53 - 168 hrs 1914 96.076 1992 2670 1085 Example calculation:
- for 0 - 1 min, load is 2616 KW. i
- determine efficiency from Efficiency vs Load Curve, Appendix 9.4:
for 2616 KW load, efficiency is 96.462
- - to find the Gross KW load, divide KW by Eff:
2616 KW = 2711.95 = 2712 KW 96.462 l
- to convert the Gross Load to Brake Horsepower BHP,
- divide the Gross Load by 0.746: ,
2712 KW = 3635.39 = 3635 BHP 0.746
- determine fuel consumption (lb/hr) from Curve No. 1 of Appendix 9 1:
for 3635 BHP, fuel consumption is 1395 lb/hr
4.f ; i e
. . . . , ,,, y _ h., ..'THEAST UTILITIES SERYlCE COMPAN.
susJECT Millstone Unit 2 - Emergency Diesel BY DATE b 2'I 9Q Generator Run Time. -
-' ~
CHKD.BY DATE d( l e CALC.NO.94-ENG-1095M2 a g y, 00 , SHEET NO. OF I5 t i 5.3 Determine the fuel consumed in gallons per hour: j Fuel Fuel Fuel !' consumotion consumotion consumed (lb/hr) (x10 BTU /hr) (Gal /hr) 1395 27.4536 200.4 1372 27.0010 197.1 l 1370 26.9616 196.8 f l236
~~24.3245
- ~ ~ ~ -
177.6'
~
~
1341 - 26.3909 192.6 1250 24.6000 179.6 1210 23.8128 173.8 1285' 25.2888 184.6 - 1156 22.7501 166.1 . 1085 21.3528 155.9 1 l J Example Calculations: . i
- determine fuel consumption in Btu per hour by multiplying the High Heating Value of the fuel (Btu /lb) by the fuel consumption rate (lb/hr):
(1395 lb/hr) ( 19,680 Btu /lb) = 27,453,60g Btu
= 27.4536 x 10
/hr Btu /hr
~
- determine the fuel consumed in gallons per hour j dividing the fuel rate (Btu /hr) by the high heating value (Btu / gal):
27.4536 x 10 6 Btu /hr = 200 cal /hr 137,000 Btu / gal t 1 l
. i
.. i 1
i'
. co4m s so h dTHEAST UTILITIES SERYlCE COMPAN.
SU BJ E CT Millstone Unit 2 - Emercency Diesel BY DATE b E~l h d I9 Generator Run Titne!~ 'CHKD.BY DATE CALC. NO. 94-ENG-1095M2 - REv. 00 SHE ET NO. b 0F 5.4 Determine the amount of fuel required for two EDGs to operate for 1 hour, then one EDG operating for an additional 167 hours, a total of seven days. No. of EDGs Fuel Cons Fuel Time Operatina Rate Time Consumed (Gal /hr) (hr) (gal) 0 - 1 min 2 200.4 1/60 7 1 - 30 min 2 197.1 ~29/60 191 30 - 60 min 2 196.8 30/60 197
~
50 - 72 min 1 ~ 196.8 '12/60 ~3 9 72 - 90 min 1 177.6 18/60 53 90 - 132 min 1 192.6 42/60 135 132 m - 5.5 hr 1 179.6 3.3 593 5.5 - 8 hrs 1 173.8 2.5 435 8 - 10 hrs 1 184.6 2 369 10 - 53 hrs 1 166.1 43 7142 53 - 168 hrs 1 155.9 115 17929 Total 27,090 gal I Example Calculation: l
- determine the amount of fuel consumed in gallons -
by multiplying the number of EDGs operating by the Fuel Consumption Rate (Gal /hr) by the hours of operation (hr): (2 EDG) (200.4 Gal /hr) (1/60 hr) = 6.68 gallons
= 7 callons
..' coun m NL...THEAST UTILITIES SERVICE COMPANY sus >ect Millstone 1: nit 2 - Emernency Diesel BY DATE 7 Y
' ~
Generator kun Time. CHKD.sY DATE
-- CALC. N O. 94-ENG-1095Mi ; g y, 00 SHEET NO. OF 5.5 Determine how many days that two EDGs can operate for 1 hour, then one EDG can operate with 24,000 gallons of fuel available:
since the results from section 5.4 are for a seven day run, expending 24,000 gallons of fuel will result in a run of less than 7 days.
- determine the difference in the amount of fuel from the 7 day run and 24,000 gallons:
27090 - 24000 = 3090 callons
- a'ss*1 ming that the fuel will run out at the end of the run, use the fuel consumption rate at that . _
time and determine how much less time the EDG can run: 3 3090 cal = 19.82 hrs = 0.83 days 155.9 gal /hr l
- determine reduced run time: i i
i 7 days - 0.83 day = 6.17 days i i 6.0
SUMMARY
OF RESULTS ! Emergency power at Millstone Unit 2 is available for 6.17 days following a LOCA with a loss of normal power utilizing only the tech spec required amount of fuel to supply the Diesel Generators. Only one EDG operates for all but the first hour of this time; during the first hour, both EDGs are operating. Load is shed as directed by existing plant procedures. No credit is taken for fuel in the underground storage tank or offsite replenishment. It is expected that the amount of time that the EDGs ; will operate on the 24,000 gallons of fuel will be l l greater than the 6.17 days due to the conservatisms 1mbedded in the Loading Calculation and in the load . shedding timeline. Three examples are, 1) two LPSI l pumps are assumed to operate for more time than required, 2) the Aux Feed Pump is assumed to run unthrottled for the first ten hours following the event, and 3) the containment spray pump is assumed to operate continuously for 53 hours following the event when it probably will be operated intermittently. l l
remt m A ..THEAST UTl4 TIES SERYlCE COMPAN.
$U BJ E CT Millstone Unit 2 - E=ergency Diesel BY bb DATE b G nera or Run Time.
- ~ ~ ~ ~
'CHKD.BY DATE N C ALC. N O. 94-ENG-109 5M2 n g y,' 00
$HEET HO. !b 0F b In addition, conservatisms exist in the assumptions for the fuel quality used in the calculation.
The effect of an air intake temperature of greater than 90 0 F has not been considered. This aspect was not considered in the original calculation.
7.0 REFERENCES
7.1 NU Calculation No. 91-BOP-813-ES, Rev. O, MP2 Emergency Diesel Generator Operating time with 24,000 gallons diesel fuel oil available at continuous' rated lo'ad of~2750 KW fuel consumption._
~ ~ ~ ~ ~ ~
7.2 NU Calculation No. 91-004-370M2, Rev. 00, Vortex l Formation Within MP2 EDG Fuel Oil Supply Tanks. 7.3 Operations Procedure SP2613E-1, Rev. 05, Diesel Generator Fuel Oil Delivery and Sampling. I 8.0 ATTACHMENTS 8.1 NU Memo NE-93-SAB-48, to GE Komosky from DA Bajumpaa, dated June 1, 1993, entitled " Transmittal of LOCA Event Timing For Millstone 2 Diesel Generator Fuel Oil Capacity Calculations". 8.2 Standard Practices for Low and Medium Sneed Stationary Diesel and Gas Engines, Diesel Engine Manufacturers Association, Sixth Edition, Copyright 1972. 8.3 Ingersol-Rand Company pump curve No N-389, dated 11-23-71, LPSI pump curve. 9.0 APPENDICES 9.1 Colt Engineering Report, file no. R5.08-0545, dated 12-16-93, entitled " Fuel Con: urption Rates for Millstone 2 0.P. Diesel Generator Sets". 9.2 NU Calculation PA 79-126-1027-E2, Rev. O, MP2 EDG Loading Calculation. 9.3 EDG Loading Timeline Assumptions. 9.4 MP2 Emergency Diesel Generators Curve of Efficiency l vs Load. l
- i
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. **i-(Ag 9t{ - ens - le%5 m'L i PAQC
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. FIGURE 7.5 ,
Calculation Checklist i i Calculction Identifying Number 94 -t WG - IM 5mt Revision CC l
' 1.- Preparation initials ;
1.1 Section 6.1.2 6rft I 1.2 Section 6.1.3 RfE- j 1.3 Section 6.1.4 (+tc 1.4 Section 6.4.6 ME_
- 2. Verification 2.1 Section 6.2.2 1 ~
,,,. 82 i 2.2 Section 6.2.2.2 df/ l
~2.3 Section'6.2.2.3 #f/
2.4 Section 6.2.2.4 df/ - - . . - 2.5 Section 6.2.2.5 /// 2.6 Section 6.2.2.6 df./ 2.7 Section 6.2.2.7 #/A ' 2.8 Section 6.2.2.8 N/A 2.9 Section 6.2.2.9 /// 2.10 Section 6.2.2.10 A'/A . 2.11 Section 6.2.2.11 d.%/ 2.12 Section 6.2.2.15 Mfd
- 13. Aneroval Initial & Date 3.1 Section 6.3.1 h Al TI 3.2 Section 6.3.2 /(4 JIA) Iltt f64-3.3 Section 6.3.3 KI-J/O bl28W 3.4 Section 6.3.4 Mid &l-drik 1 3.5 Section 6.3.5 _ AJk //
- 3.6 Section 6.3.6 V4J A) (t/N I I
- 4. Non-OA Aeoliestions lpitial & Date .
4.1 Section 5.4 waived A/A . - 4.2 Section 6.1.4.7 waived MA . 4.3 Section 6.2 waived A/A Basis for Waiver (s)
\ !
\
\\
NEO 5.06 Rev. 6 sos-s.szo Page 7.5-1 of 1
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CAV- - ENG - 1095 tTrt. fAGE 17 oF 13
,. FIGURE 7.2 - -
CTP DATA BASE INPUTS
- 1. NUSCO Calculation Nu=ber kk ~b bf ~ l@% T772
- 2. Vendor Calculation Nu=ber 66C HTE.L 7_ZP oa> -/ daft) 5/z/ /1@ ,
- 3. Title MILL'ifcN6 d6flT 2 - ETOEt?_6ENCY 3(EML $ErJ (20MlTnc.
4 Latest Revision /Date Of>
- 5. CCN# N6Nb
- 6. Superseded By 67V6
- 7. Plant --N -- - -
- 8. Building / System / Component Code r V4 bbN ~ ~
/ / I
- 9. Component I.D. A - H TA B)- f-l'1 B.
- 10. QA (Y/ro 65
'.1. Computer Code Used CNE
- 12. P.A.# DNb
- 13. Reference Calc. # 9 l-2)CP - S l?> -E% b . k l - dA>O - MO T711 20, pp 19-/26-fa2:7 -E2L 20 .
- 14. Reference Drawing A/57v'er
- 15. Coc=ents I
e NEO 5.06 ' Rev. 6
- h er__2 ?.1 nr 1
. v A Lc_ 9 4 - E/4CT -IO9 6ID FIGURE 7.6 CALCULATIOk @GC 13 0F 13 COMMENT / RESOLUTION -SHEET Cc=:sint . .
Numb:r COMMENTS Resolution 01 App 9,4 - EmarncY 4HovM NOT de uP AT fBL cnYmzMnow haTH THC lbtVfd few622. tEVELG, VSNp077, SL7[C, fhRil l00VA' H4k Tilt ErV/c)EdlY A7 V2 UAO SMnw BE LE% 7HAN /4' 4 Ftu u ^b. Tile 96,f FFF /ND/tATED /N' 17/T ED6*WEL 6HsulD /3"tb48t/ 8E* 95[a %Y L.02V5 1 &Al& MIL B6 Or'ANGCD To fcftEd 7H5 A Uf_tE v/AS FI T TD TH E 2; PT6 AMD CALC VCDc-NE. NEO 5.06 Rev. 6 sos-6.ieo Page 7.6-1 of 1
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d ~ m 7u n m w r s,t m e s.m _ @ _ l REVIEWED BY June 1, 1993 NE-93-SAB-248 J. A. B. M M. S. K.VH9,F D. A. O. W. L V.
'M. V. B.
TO: G. E. Komosky E. A. D. FROM: D. A. Bajumpaa Ext. 3062
SUBJECT:
TRANSMITTAL OF LOCA EVENT TIMING FOR MILLSTONE 2 DIESEL GENERATOR FUEL OIT. CAPACITY CALCULATIONS
REFERENCE:
NUSCO Calculation W2-517-1057-RE Rev. O, "MP2: LOCA Event Timing for Diesel Generator Fuel Oil Capacity Calculations," 6/2/93. In response to your request, the timing for key events following a large break LOCA is provided in Table 1. Two cases are provided in this table, a case assuming a diesel generator failure at the initiation of the event; and a no single failure case with both diesel generators running for the first hour following the event and one diesel generator running thereafter. In using this table, l keep in mind that there could be a considerable variation of these ; times due to operator decisions and due to break size. A discussion of these effects is provided below. l SRAS-LPSI off: the times provided in Table 1 for SRAS are calculated based on the large break LOCA with the maximum - -
)
initial RWST Volume of 475,000 gallons, and the minimum i unthrottled safety injection pump flowrates at the containment design pressure for the operating diesel generator ; configuration. Note that for smaller break sizes, the ! operator may throttle safety injection flow. If the operator were to throttle safety injection flow, then the time to SRAS would be increased. However, the fuel oil consumption should . be decreased as the pump is not delivering maximum flow. Note that any non-conservatism in SRAS event timing due to unthrottled safety injection flow should be covered by the assumptions regarding AFW event timing, as discussed later.
CALC H ' $-(o%mt
.. (?A 66. AL M TTA(.fi t'r1 ENT 6:I fAdt 2cv 9 NE-93-SAB 24B -2.- June 1, 1993' r
Charging / Boric Acid Pumps Off: the times provided in Table 1 for the termination of the charging and boric acid pumps are based on the depletion of ~ the maximum volume of both boric acid tanks (12,950 gallons) at the minimum volumetric flowrate corresponding to the number of operating charging pumps.- In both scenarios, two charging and two boric acid pumps are assumed to be aligned to the diesel generator operating throughout the event. LPSI on two path injection: the time provided in Table 1 for the LPSI pump on for two path injection is based on the minimum LOCA EOP time (EOP 2532) of 8 hours. AFW off: the. time of AFW termination provided in Table 1 is based on the maximum time for shutdown cooling initiation specified in the LOCA EOP of 10 hours. Note that the assumption of AFW on for 10. hours is very conservative for large break LOCAs, as they do not require significant amounts of AFW. This conservatism, is included to bound the fuel oil consumption of the spectrum of LOCA break sizes. Certain LOCA break sizes may utilize AFW after 10 hours. However, these break sizes would not require AFW continuously from 0-10 hours, ensuring that the fuel oil consumption calculation is conservative. Containment spray off: the time of containment spray termination in Table 1 is based on the time af ter reactor trip when the minimum heat removal capacity of one train of containment air recirculation fans is equivalent to the maximum decay heat rate specified in the Standard Review Plan (NUREG-0800). For the case with no single failure, the timing of the second diesel generator being stopped one hour after a LOCA is based dn input provided by your group. While this assumption is the original design basis for tank sizing calculations, we do not
~
necessarily consider this to be a bounding assumption. We understand the EOP 3528 directs the operator to reduce load and stop one of the two operating diesel generators one hour after an electrical emergency. However, following a LOCA, the operator will bs in the LOCA event specific EOP- (EOP 253:2) . Note 1 of Figure 3.la of this procedure directs the operator to remain in the event , cpecific EOP provided that one vital bus is available. Consequently, we do not believe that the operator will enter EOP 2528 following a LOCA, and that the termination of one diesel at one hour will not necessarily occur. We do agree that at some undefined time after a LOCA one diesel generator will be stopped to preserve safety related equipment.
1 (* .- t
~ ~ ~ ~ . .
NE-93-SAB-248 June.1, 1993 r The information in the Table 1 has been verified in accordance with l NEO 5.06, and is documented in Reference 1. Should you have any !
. questions or comments, please feel free to contact me at Ext. 3062 cr Mike Kai at Ext. 3179.
DAB /ajs Attachment CA L,g, q Q - E N 6 -l @f$ rn 2.- PARC A3 cc: N. K. Jain ' M. S. Kai A77 Acgmgg g,} pag .3 ep 9 R. W. Wells . ---- - i O
i . e cat (_ 94 - ENQ - lc9 6 m 2,_ fade . M -_._ . - ATTAR _ timer 4T & l PA dE ifor4 Table 1 MP2 LOCA Event Timing for Diesel Generator Fuel Oil CaDacity Calculations Time (hours) Case With 2 DG for
~ ~ ~ ~ ~
' Case With DG Failure Event 1 hour, then 1-DG for Event -
SRAS-LPSI off 2.3 1.2 Charging / Boric 3.0 2.2 Acid Pumps off (two pumps each on diesel running throughout event) LPSI on Two Path 8. 8. Injection AFW off 10. 10. Containment Spray 53. 53. off
g _
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.i 7.
*I $
- b. 5!
STANDARD PRACTICES C for ! 'b b LOW and MEDIUM SPEED k STATIONARY DIESEL and GAS .( >
-o
- o ENGINES l t t, .
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- 1 i .
Sisch Edhien
~n h D N 9
9 f is m j .D n e 1 Copyrigk! 1972 5 ~p ' R DIESEL ENGINE MANUFACTURERS ASSOCIATION A Q2 ^ 8$ 122 East 42nd Street c4 New York, N. Y.10017 h 1 9 Paice $8.00 Domesde
.0
$9,00 Foreign N
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. . W Table 4-IItzh and Low IIcal Values of Some Typical Diesel Fuels' law iteating vakie y Gravhy, Sp.Gnvity. Wdght Fud, IllahflestierYalue Btu /plion Be /lb Btu /sallon m
- API at 60 F Ibs/s211on Btu /lb -
19,860 133,500 18,60) 125,000 , 44 0.8063 6.713
- . 19,810 134J00, 18,560 126.200 .
;, 42 0.8155 6.790 135.600 ' 18,510 127,300 g 40 38 0.8251 0.8348 6.870 6.951 19750 19,680 137,000 18.460- 128.500 p h 5
18,410 129J00 o
- 36 34 0.8448 0.8550 7.031 7.119 19,620 19,560 138,200 139,400 , 18,360 130,900 W n
y 19,490 140,600 18,310 132,100 7.206
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4 Fairbanks Morse
". COlteC Industries Engine Division 701 Lawton Avenue Beloit. Wisconsin 53511-5492
-- - , _ _ _ Telephone: 608/364-4411 Telecopier: {>C8/364-0382 December 17, 1993 CAcc. M - EN4 - IO %m2.
FAqc AF I ~
- Arecupsr 9,1 em e , n= g
,g, g PO Box 128 Waterford, CT 06385 Attention: Gary Komosky PSD, Bldg-404
Subject:
Millstone 2 NU PO 890321 Coltec Order 35-734305 Standby Diesel Generators - Enclosur'e (1)~ Coltec Engineering Report R5.08-0545, dated 12/16/93 Gentlemen: Enclosure (1) is attached per subject order requirements. If you have any questions or require additional information, please contact the writer at (608) 364-8424. Very tru y yours, NM T. M. Stevenson Supervisor Nuclear Parts TMS/dr - cc: W. Martin G. Monahan A eim on of coit.c enouste... inc
l'
' CEltecindustri;s I ENGINI IING REPORT m a n f_ o r J_ S$* 2-F;Irbinks Morse '
N Engins olvision mea R F.oB- 0 545 j DAR l2-( 6 -3 3 " sm' ,Northeas u, clear Energy Co. - Millstone 2 FREPARIMd 7Il i sr 6. Me nA ' ADORT mu Fuel Consumption Rates for Millstone 2 0.P. AFP,R T VED Diesel Generator Sets U To obtain the fuel consumption in units of gallons per hour, the expected high heating value of the fuel must be determined. For conservatism, the lichtest fuel expected should be considered, as ; it will have the lowest energy content on a volume basis. The fuel rate in BTU per hour (gross) divided by the high heating value in BTU per gallon will yield the fuel consumed in gallons per hour. 6 example: 29.8 x 10 BTU / HOUR (cross) = 224 GALLONS /HR ! 133,000 BTU / GALLON D. Correction for Ambient Temperature
~
For engines running in ambi~ent' temperatures where'the air intake
- temperature exceeds 90 degrees Fahrenfeit, the expected fuel !
consumption is increased. The established correction for the O.P. engine is a 0.6% increase in fuel consumption for each degree Fahrenheit that the air intake temperature exceeds 90 degrees Fahrenheit. For an air intake temperature of 103 degrees Fahrenheit, the correction would be: (R4 GALLONS / HOUR)((103-90)(.006) +1
=
= 241 GALLONS / HOUR III.
SUMMARY
/ CONCLUSION
.The fuel consumption data from the original factory contract tests ,
can be used for calculating fuel storage requirements for operating at any given load. Data shown on the attached curves is typical for these engines when operating in the "as new" state. Fuel rates . can be expected to dedrease from the test floor values as operating !' hours are accumulated. . i To determine the rate of fuel consumption at any given kilowatt ' load, the generator efficiency must be determined at that load from
. the efficiency curve at the desired power factor. The engine brake horsepower load can then be determined and the fuel rate read from the attached curves. The fuel rate in gallons per hour can then be
. calculated using the procedure outlined in this. report and ,a_ssuminc ;
j n fuel higher heating value which corresponds with the lichtest l fuel that can be expected to be procured at the site. If an air l [ , intake temperature above 90 degrees Fahrenheit is to be assumed, 1 I the fuel rate correction given in Para. II.D. may be applied. ( C A t.c. % -!?NG - kbR 5iT11 -
- )
FA4c AP 2. i bpPENQlX. 9u l PAMBW5
Ctit: C'Industri3S , (" h Fcirb:nks Morse ENGIN ENG REPORT suzeri or L N
'$o."
,gg3r, gg,og _ o g4 g l
Engine Division . .
* ~ - ~
DATE l 2, l (, C[ 3 smeer Northeast Nuclear Energy Co. - Millstone 2 g, y ST 6. Mor%M REPORT rm.z Fuel Consumption Rates for Millstone 2 0.P. AFP,yRom Diesel Generator Sets U This engineering report is prepared in response to Northeast Utilities Purchase Order No. 890321 (AIN 11498A). Northeast Utilities (Millstone 2) requested a formal engineering report indicating the fuel consumption rates for the Millstone 2 0.P. diesel generators S/N 38D872035TDSM12 and S/N 38D875022TDSM12. I. BACKGROUND Engine S/N 38D872035TDSM12 was originally manufactured with a
~
- 'turb5'-parallel ' scavenging air system an'd was f actory tested in June - !
of 1972. Engine S/N 38D875022TDSM12 was built to the turbo-series ! design and factory tested in 1975. In 1992, the turbo-parallel engine, S/N 38D872035TDSM12 was overhauled and converted to the turbo-series design. The two engines now have identical builds , such that performance and fuel rates of the two engines are l expected to be approximately the same.
- t l
II. ASSESSMENT I A. Turbo-Parallel Encine Contract tests were run on the engine S/N 38D872035TDSM12 with the original turbo-parallel design. During the tests, fuel consumption rates were measured at various load conditions. The measured fuel consumption rates versus brake horsepower load are plotted on Curve No. 1. B. Turbo-Series Encine turbo-series design engine S/N ; During contract tests on the l 38D875022TDSM12, fuel consumption was measured at the required loads. Results of fuel consumption plotted versus brake horsepower load are summarized on Curve No. 2. C. Calculation Methodolocy The measurement of fuel consumption was done using the same
. technique for both engines. The engine load was set using the kilowatt meter. With the load held constant, a stopwatch was used to measure the time elapsed while a set weight of fuel was ,
consumed. The heating value of the fuel, obtained by sample ! analysis, is multiplied by the fuel rate in pounds per hour to ( ' i determine the fuel consumption in BTU per hour.
.. 1 example: (1500 LBS/ HOUR)(19893 BTU /LB HHV)
=29.8 x 10 6BTU / HOUR (gross) cat.c % - Erkt - 10:4) G (TY2_.
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>ftenrise PmE 1 , AA AB AC AD f i 2 AE 2 2 =c 3 o i 3 Z 4 MotorRating Actua! Load kW-Time PostLOCA ', 4 co . 5 DeserWbn HP BHP 8 ServiceWater D 90 hen .>90 Wim 5 g 450 415 333 4 7 RDCCW l 331
. 350 315 251 251 7 8 HPSI . .- -
.T'400 1 445
-n 381 ,
3 61 8 o 1 Antw. *12 mew $ LPSI -
- . -i; -
450 W 375 M- - 8 $ //ererr 53ss to chemenisern. . ;.4 . iso n 4 20e 6eD toi IBj f /rtre.- lant', 11 Aindcaryreedseter- 360 s. -8 360 C.289) S89 11 % tt.I h jd W IMMN 12 & &Q@ 13 Boric Acid (2) ____,_ ____ _ . * ) __ __,= - 2% " - U M h - 12 h 14 SaletyRelatedTNAC 50 . . . ci M-50
@ - 13 5 M
m 282 282 14 15 BatteryCharger . s, - u 6 tn 94 94 15 16 480VUClemtLosses . 9t - - ** 35 35 16 Y hi'Ttt Imt>J 17,,Metor operated Vanes 18 EmergencyLighting
- 3 d --
i? v1
@'sa 68 18 17 19 Regtdat!ngTransformers 8 -
41 41 19 20 ComputerUPS * - 50 50 26 =1 21 ComputerRoom NC * - - 32 32 21 N 22 MiscellaneousConnected
- v M'ttir_46mw 23 SpentFuelPoo,lCooling 56 56 22 %
, 15 15 0 13 ' 23 m
___24 HydrogenReconener ' 0 75s 24 S 25 Instrument _A_i_r C.- ._75 75 0 66 /
- m m
26 Turbine Ausdllarfes _1_00 100 0 80 v i._ _wn 27 Totals 2ste - 22ss 27 .
#8 m
- rs m 29 CALG 9 4 -ENCr -IO 95 nt<2_ 29 3o Peac Apro 3o 31 ,
. 31 32 AFy r m pg.4 q ,q, g g g. 32 as
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29-Doo-93
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;.<;.,-sL.y N PA o. 79-126-1027-E2. Rev. 0 . N '
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1
. MP2 'B' EDG Loadng Calculation p'
i a I 35 AA AB AC AD AE 35 y, 36 ActualLoad NotorHanne kW-Tirse PostLOCA at n 37 Descrip6cn HP BHP O-40 Min >80Mh 37 E US CARFans(4 SafetyRelatedlWAC '75 76 W
- W 38 a 39 E3FRoom Air Recire 15 15 13 13 38 Ea 40 EnctBldgFR '25 25 22 21 44 41 ControlRoomBd.aust .. . .7.54 7.5 7 7 41 42 CentrelRoom FUter.- _ / 15.0 ~2 n 5.0 4 4 42 43 EDG RoomVent - un i
'.20 I' < - .
I'l 20 .18 18 43 44 BatteryRoomBrhaust E. c 23M ;:)? . 3 3 3 f i 82. 45 DCSwgrRoomCoelhg .
~
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46 ACSwgrRoomCooting . 22 ;.1 25 -5 [O 25 22 i 22 44 Nm
, 47 vital 5wgrRmVent " to < .
...i 10 9 9 47 <
46 VltalSwgrRocmCooling .
.5'. si 5 4 4 48 8 "
49 DC Swgr Room Chilled Water 4 45*i9 5 4 4 49 50 ControlRecemNC 5" 'r M 11 15 "3 15 13 13 60 51 ControlRoom AlCCornpressor = ce .-J 40 i!! 40 35 35 51 52 Controlpoem AlCCondenser O r,203 : 20 la 18 52 53 ChglerX1998 - - :- r: -
- + -
15 16 58 64 EnctBldgFRtHester - - 25 25 54 = 55 $ Totals 282 E 202 56 66 ContainmentSample Miocenaneous 57 HydrogenMonitor 1 2 1 1
, 1 54 3 2 2 ; 2 57 '
n 58 DieselOETransfer 2
~~
2 2 2 58 5 3~#rt<. 5o rNN 69 EDG AlrCompressor --- 5 5 4< - 7 oo 60 EDG AtedRarles-- 37.5 37.5 33 , 33 , u 61 MeterHeelerMmr - - 15 16 6i' 3
. i 62 AFWSumpPumps 83 RCP05LMPurrps '
6.5 6.5 6 . 6 82 0 8 8 5 5 83 64 ServicaWaterStrainers, 1.5 1.5 1 1 84 65 BericAcidTantHestors - - 14 18 SS 88 8peceHesterXimr - 15 15 86 or sectica DuctHemiwe2 - ; - is 16 sr 68 Totale I 117 112 88 ? c
. . .c
. ' 29-Doo-93 * 't. -
.s, c At.r_. M - ENG-( e9S rn 2_
.; . 2. .o .. .- < <
,. l Calc. No. PA 79-126-1027-E2. Rev. 0
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MP2 'A' EDG Loading Calculallori i g* I
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1 AA AB AC AD AE 1 2 2 2 :x o
- z; 3 3 .
4 Motor Rating ActualLoad kW-Time PostLOCA 4 co s Deseviption HP BHP 6 90 MM >90lan 5 S-8 ServiceWder 450 415 333 333 6 7 RBCCW , 350 315 251 251 7 8 HPCI ' it . .. '* 400 .n 445 361 Ott 8 m t LPSI - 400 $.
- 375 301 - 3 $
~
10 Cent.ainmerASpray L 250 2. '.1 200 161 141 10 '! r 11 AvnllwyFeedwater .- 350 360 289 286 11 ua 12 Charghe(2) . - 200 fl5"l 180 158 - 12 y 13 SafetyRelated HVAC - ;- i. L5 - 275 275 13 .-$ 14 BaceryCharger . {j . M M 14 y 15 480VilCXfmrtosses - W -:.. 15 - 36 35 15 O! 16 16 MotorOpermedVapves - -
* *i - 57 17 Emergency Ligheng * - !' 72 72} 17 18 RegulatingTransformers * -
') f1 - 41 41 18 -
13 Cornputer UPS * ." *+ . . 60 50 19 20 Computer RoomNC * . - 32 32 20 't 21 M!sostaneous Connected * - . 63 60 21 22 SportFuelPoolCoolino 15 15 0 13 22 D 23 Hydrogen Roccaibiner - - 0 75, 23 m 24 helnnnent AirCornpressor 75 i 75 0 68 24 S 25 Tetels 2572 2208' 25 m, as . 2s 2r . 2r 2 m 28
- m 28 29 .- . 25 so .
m 31
'. 31 M .
1 s R i 3s
. 3:
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0e0-93,- L4 -: . calc.No.PA79125-1027-E2,Rev.0
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.= ,g T
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. 41 ControlRoomExhaust . . 7.5 7.5 7 7 41 42 ControlRoomFuter,
- C-4 425 -n
- n 5 4 4 42 u
- o 43 EDG RoomVent -
~3 r20 .-
20 18 18 43 o u
-44 Bettery Moorn Exhaust .' -
h a 'a ' ~~ W 3 3 3: 44
-0 46 DCSegrRoomCooeng C e f- C5 5 4- 4 48 a
46 ACSwgrRoomCooHog ,
~
^: '25
._ . I 25 22 22. 46 y.
47 VitalSegrRecraCooRng 7.5 $ 7.5 7 7 47 5 48 DCSworMoomChaledWater i - e, :J5 ;h 5 4 4 48 h_
. 49 Cortrol Room NC.!! 5 r3 1J Z15 a 16 13 13 49 50 CortrolRoomNCCompressor ' - "
C40
' 40 35 35 50 51 ControlRoomNCCondenser 74 ::; ::t -20 20 18 18 51 52 CNilerX198A -
-u F2 l - 15 15 52 53 BeinMerutHester 9-: s' ~1 - 25 25 53 64 Tetale 275 275 54 m 65 ContelamentSarnple Misceitaneous SE 1 1 1 1 55 56 Post AccRedMon 3 3 3 3 56 h 57 DiesetOIITransfer. . -2 , . . .
2 2 2 57 m 58 EDG AirCormpressor 5 5 4 - 68 8 59 EDO Auulgarles 37.5 37.5 33 25 53 g-80 MotorHesterXfmr' - - 16 15 to ' 41 RCP OE Lnt Pumps 62 ServloeWaterStralnere . 4 1.5 1.5 6 5 1 e 5 et 1 82 M ui 63 PuelHendHrtgBideHN - 15 15 13 13 83 64 Boric AcidTankHesters - - t8 18 64 05 %HeelerXfmr - - 15 15 85 66 ElectricalDuctHester#1 - - 15 15 es - 87 Tetels . 125 121 ST a u As m m a M ? o N
.e 25-Dec-93
. :. - - cat.c. % - ENGR -l<b d m'2._
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\
e g CALC 94-ENG-1095M2 Appendix 9.3 . Page APio W O ASSUMPTIONS LOB THE I!EW IQG G LOADING TIMELINE: Adjusted Event Load Initial full load: 2616 KW A. After 1 minute: 2558 KW
- motor operated valves OFF (-58 KW)
The motor operated valves required to operate after a LOCA have moved to their accident position in one minute or less. NO OPERATOR ACTION IS REQUIRED . .. . B. After 37 minutes: 2554 KW
- EDG starting air compressor OFF (-4 KW)
The EDG starting air compressors have recharged the air flasks in 30 minutes per section 6.6.2 of the EDG Specification. This 30 minute time corresponds to the time required to recharge an empty flask. This is a conservative assumption since the flask will not be empty. NO OPERATOR ACTION IS REQUIRED C. After 72 minutes: 2253 KW
- LPSI pump OFF (-301 KW)
This time is based on the large break LOCA with the maximum initial RWST Volume of 475,000 gal, and the minimum unthrottled safety injection pump flowrate at the containment design pressure. The LPSI pump will automatically shut-off when the SRAS is generated.
~ ~
NO OPERATOR ACTION'IS REUUIRED' i D. After 90 minutes: 2495 KW
- Instrument Air Compressor ON (+66 KW)
This time is an estimate based on the assumption that it will require the operators some finite amount of time to determine the course of action and physically realign cooling and reset the power supply to the instrument air compressor in order to return it to service. OPERATOR ACTION IS REQUIRED AND IS PROVIDED BY EOP 2525 AND AOP 2563. Page 1 of 4
'r ..
CALC 94-ENG-1095M2 Appendix 9.3 .
. . _ _ . Page AP12 --
c
- Boric Acid Tank Heaters OFF (-9 KW)
Once the Boric Acid Tank is emptied, the Boric Acid Tank Heaters shut off when their temperature setpoint is reached. NO OPERATOR ACTION IS REQUIRED. F. After 5 1/2 hours: 2196 KW
- Turbine Auxiliaries OFF (-88 KW)
Per Operations Procedure, OP 2323A, the turbine should be operated on the turning gear for a maximum of four hours. OPERATOR ACTION PROVIDED THROUGH-OP 2323A. G. After 8 hours: 2364 KW
- LPSI Pump ON (+168 KW)
One LPSI pump is re-started after 8 hours and is used for the remainder of the event. From calculation 78-713-52GM, the maximum LPSI pump flow ! available due to the Boric Acid Precipitation scenario is 430 GPM. The corresponding BHP from the pump flow / BHP curve is 210 BHP. The ! corresponding KW is: 210 BHP x 0.8 = 168 KW. The LPSI pump curve is provided in Appendix 9.4. - The HPSI pumps may be used as an alternate to LPSI for Boric Acid Precipitation; no additional electrical load is added since it is asenmed that both HPSI pumps are already operating. OPERATOR ACTION PROVIDED IN EOP 2532. 2 H. After 10 hours: 2075 KW
- Auxiliary Feed Pump OFF (-289 KW)
- This time is based on ' the maximum time for shutdown cooling initiation specified in the LOCA EOP of 10 hours.
OPERATOR ACTION IS PROVIDED IN EOP 2532. 1 Page 3 of 4 4
- f : ,
, 1 4 CALC 94-ENG-1095M2 Appendix 9.3 - - - -
._.___. . -. -.---. - Page AP13 ;
, j I. After 53 hours: 1914 KW j
- Containment Spray Pump OFF (-161 KW) l This time is based on the time after reactor trip when the minimum heat removal capacity of one train- .
of containment air recirculation fans is equivalent to the maximum decay heat rate specified in the ! Standard Review Plan (NUREG-0800). This is a conservative assumption as the. ' containment spray pumps are shut-off when containment pressure is < 7 psig and are used i intermittently until the decay heat removal required is equal to the containment air recirculation fans heat removal capability.
" "~~
- OPERATOR ACTION IS PROVIDED IN EOP 2532. l t
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Docket No; 50-336 B15317 l I Attachment 3 Millstone Nuclear Power Station, Unit No. 2 Request for Additional Information MP2 EDG Load Shedding Procedures l l i August 1995
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