ML20070J750

Rev 0 to Calculation 91-019-152-M3, Identification of EDG Run Times Under Varying Fuel Oil Storage Levels

ML20070J750
Person / Time
Site:	Millstone
Issue date:	08/28/1992
From:	Dimare J, Faye W, Hutchings C NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20070J635	List: ML20070J716 ML20070J750
References
91-019-152M3, 91-019-152M3-R00, 91-19-152M3, 91-19-152M3-R, NUDOCS 9407250300
Download: ML20070J750 (107)

Text

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CALCULATION TITLE PAGE Page 1 of go Latest Plus 5 attachtnents NUSCO Ca!c. # 91-019-152M3 Revision s O A/E Calc. s/ other. O A (y/n) Y ccNs Superseded by:

TITLE:

Identification of Emergency Diesel inte,1.cef Generator Run Times Under Varying Distnbution Date Sent Fuel Oil Storage Levels g/gg g i

CMP Prepared by: Joseph J. DiMare / William C. Faye (typed)

K%~Ac// c.cy olie)9z (synafurt)

'l (date)

Reviewed by: Charles D. Hutchings (IR) Method of review. Full Review

~

0 $ 'd? Pkf/S".'L.

(synature) y faate)

Approved by: Donald C. Gerber (t ed)

= -

8-7 9 9 2.-

(synature) (date)

Responsible Discipkne: Mechanical COMPUTER REV. s/

PLANT E.Al COMPONENT ID CODE USED LEVEL MP3 91-019 3EGF*TK1N1B .-- --

3EGF*TK2N2B REFERENCE REFERENCE STRUCTURE SYSTEM COMPC M CALCULATIONS DRAWINGS EGF 3EGF'TK1N1B 12179-P(T)1195, Rev. 0 12179 EM-117 A 7 3EGF'TK2N2B 12179-EP40 A-8 12179 SP 3EGF 2, Rev.0 12179 EP-608 8 12179 SP 3EGF 5,Rev.1 GoULD PUMP Dwg. No. D1709, 12179 SP 3EGF-6, Rev. 3 9407250300 940714 6/11/79 12179.SP-3EGF 11, Rev. O PDR ADOCK 05000423 National Annealing Box Co. Dwg. 12179 SP 3EGF-12. Rev.0 P PDR No. NS5990, Rev. IV,5/9/77 92 LoE.160E3, Rev.O Nanonal Annealing Box Co. Dwg.

COMMENT: This Calculation supercedes calculation No.12179-96 (P), Rev. O e

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l CALCULATION CffECKLIST )

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Calculadon No. 91-019-152M3 i

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1. Preparation Section Rev.0 Rev.1 Rev. 2 1.1 Legible, reptaducible, comprehensive 6.1.1 ///I/[,ln 1.2 ID Logged m, retrievable 6.1.2 4//p i/g/n.

1.3 Documentadon format and contents complete 6.1.3 #ffdh/n.

1.4 As-built information added 6.1.4 /A///p&/g lll

2. Verification Section 2.1 Prepared in accordance with Secdon 6.1 6.2.2.1 02W' /Mef.2 2.2 Assumptions reasonable 6.2.2.2 dce 14#2 2.3 Method acceptable 6.2.2.3 cr.# ///#2 2.4 Input data correct 6.2.2.4 Os#&&

2.5 Modeling adequate 6.2.2.5 c.:td M/42 2.6 Manual calculadons correct 6.2.2.6 es#Nd 2.7 Computer calculations correct 6.2.2.7 N4 W/4 2.8 Design requirements met 6.2.2.8 d2W M42 2.9 Solution correct 6.2.2.9 OS.w /46 2.10 Software validated 6.2.2.10 A,4 m#/h 2.11 Review methodidentified 6.2.2.11 d.DX M42 2.12 Documentation complete 6.2 vsN/A4

3. Approval Item Section Preparer / independent reviewer qualified 6.3.1 gi!g-92.

In conformance with NEO 5.06 6.3.2 qs.es.9z, j O

Level of documentation sufficient 6.3.3 Rs.g-77, l C -

Level of verification sufficient 6.3.4 o g.zs42 ,

U I User Software Qualification 6.3.5 u[i4

/

Calculation 91-019-152M3 Rev. 0 Page 2 of 80 1

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TABLE OF CONTENTS SECTION PAGE TitlePage...................................................................................................................1 Calculation Checklist .. ......... ... .... . . . . ... . .... .........................................................2 Tabl e o f C o n te n ts .. . .. .. . . .. . . .. . . .. . . . . . .. . . . . . . . . . . . .. .. . . . . . . . . .. . . . . . . . . . . . . . . . . . . .. . . .. . . . . . . . . . . . . . . . . . .. . . . .. . .

Objective.........................................................................................................................5 Assumptions.................................................................................................................6 Methodology..................................................................................................................7 Re ference s/Desi g n I n p u ts ... .. ... ... .. .. .. . . .... . .. . ..... ... . .... ... . .. .. .. .. .. . . . .. .... .. . . .. .. .. .. .. .. .. ... ..... .. .. .... .. 8 S u m m ary o f Re s u l ts . . .. . .. .. .. . . .. .. .. . . . . . .. . .. . . . . . .. .. . .. . . . . . . .. . . .. . . .. . . . . . . . . . .. . . .. .. . . . . .. .. . . . . . . . . . . . . . . .. . . . . . . 12 B o d y o f C alc u l a ti o n .. . .. .. .. .. ... . . . . . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . . . .. . . . . . . . . . . . . . . .. .. . . . . .. . . . . . . . . . . . . . . .. . . . . . .. . . .. .. 1 8 I. FUEL OIL STORAGE TANKS

1. Determination of diesel run time based on a filled (35, 340 gal. ) tank and 12" pu mp submergence............................ ................ ........ I 8

2. Determination of diesel run time based on a 95% fill level of the tank with specific gravities (S.G.) .83 and .89 considered............................... 20

3. Determination of diesel mn time based on a Tech. Spec. minimum volume of 32,760 gallons in the tank and determination of reduction in pump submergence required to allow 3.5 days of diesel mn time................ ..... 24

4. Determination of diesel run time based on 88% level in the tank with specific gravities (S.G.) .83 and .89 considered ......................................... ... 27

5. Determination of run times considering variations in specific gravity, instrument inaccuracies, 88% and 95% tank levels, and fuel consumption rate based on the 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> rating electricalload...................... 31

6. Determination of" Worst Case" run time considering temperature affects on S.G., instrument inaccuracies,88% and 95% tank levels and fuel consumption rate based on 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> rating electricalload....... ............ 37

7. Determination of Technical Specification compliance considering temperature affects on S.G., instrument inaccuracies and 88% tank level ............. 40

8. Determination of Technical Specification compliance considering temperature affects on actual recorded S.G., instrument in accu racies and 8 8 % tank level ............. .......................................... .. ............ .... 4 2 Calculation 91-019152M3 Rev.O Page 3 of 80

II. FUEL OIL DAY TANKS

1. Determination of the capacity (gsilons) of the fuel oil day tanks and identification of the usable and tnusable volumes considering vortex ge ne ration . .. . .. ...... . ... . . .. .... . ... .. . .. . .... .. .. . . . . .. .. .. .. .. . .... . ... . . .. . . . . . . . . . . . 4 5

2. Determination of the amount of usable fuel oil and diesel run time with the day tank filled to the low-low alann setpoint of 18".. . ..................... .. .. 53

3. Determination of the amount of usable fuel oil and diesel run time with the day tank filled to the low level alarm setpoint of 23" ...... ................ .. . .. 55

4. Determination of the amount of usable fuel oil and diesel run time based on the lead pump high and low actuation setpoints (incl uding instrum ent inaccuracy)... ... . ........ ........................ ............................... 5 6

5. Determination of the amount of usable fuel oil and diesel run time based on the follow pump high and low actuation set points (inclu din g instrument inaccuracy)........ ...................................................... .. .... .. 69

6. Determination of the amount of usable fuel oil and diesel run time based on the 205 gallon minimum F.O. day tank volume as specified in th e Tec h . S pec. .. . . .. . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. . . . . . . . . . . .. . . .. . . . . . . .. .. . . .. .. .. .. .. .. . . .. . . . . . . . . . . . . . . .. .. . . 7 6

7. Determination of the volume of F.O. required in the day tank to satisfy the ANSI N195-1976 requirement to " Maintain at least 60 minutes of operation at the level whem oilis automatically added to the day tank

... plus a minimum m argin of 10%" . .............. ....... .... . ... .................................. 7 7

8. Determination of the length of Diesel Generator run time based on the 490 gallon volume specified in operating procedure OP-3346B .......... .... ............ 79 Conclusions...............................................................................................................80 Attachment 1 "The Power Handbook," ................ ......... ............................................ 2 Pages 2nd Edidon by the Editors of Power Magazine Copyright 1983, McGraw-Hill, Inc.

Page 36, " Tanks - Figuring Their Capacity."

Attachment 2 - Engine Data Sheet from Ref. 7, Page 4-4 ................................................ 2 Page Attachment 3 - Viscosity of Fuel Oils Curves from Ref. 34............................................. 2 Page Attachment 4 - Figure 2 " Critical Submergence Dependence ........ ........................ ...... 2 Page On FRNumber", from Ref. 29 Attachment 5 - Figure 3, " Minimum Submergence Limits.. ..... .. . ............................... 2 Page For Intakes With Both Symmetrical and Lateral- Approach Flows," from Ref. 30

- Calculation 91-019152M3 Rev.O Page 4 of 80

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l OBJECTIVE This calculation was pn pared in support of a reportability evaluation performed under Reportability Evaluation Form (REF) number 92-42.

The objective of this calculation is to identify the Emergency Diesel Generator mn time under the following conditions: ,

i I. FOR FUEL OIL STORAGE TANKS 3EGF*TKl A AND 3EGF*TK1B

1. With the storage tanks filled to their capacity of 35,340 gallons (Ref. 6), determine the diesel engine run time.

2. With the storage tanks filled to their 95% level (Ref. 22), determine the diesel engine run time. Account for fuel oil (F.O.) with a specific gravity range of .83 to .89 (Ref. 25) and  :

also consider instrument inaccuracy.

3. With the storage tanks filled to the Technical Specification (Ref. 9) minimum fuel oil volume of 32,760 gallons, determine the diesel engine run time. In the event that the resulting diesel engine run time does not meet or exceed 3.5 days, a determination will be made as to what reduction in the submergence value (<12" - Ref.18) would be required in order to obtain a 3.5 day run time.

4. With the storage tank filled to the 88% level (Ref. 27), determine the diesel engine run time. Account for F.O. with a specific gravity range of.83 to .89 (Ref. 25) and also consider the instrument inaccuracy. l l

5. Determine the run time based on the following considerations 1) variations in S.G.,2) l instrument inaccuracies. 3) the 88% and 95% tank levels and 4) fuel consumption rate i based on the 2000 hr. rating electrical load.

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6. Determine the worst case run time basi on the following considerations 1) with the i I

storage tank filled to the 88% and 95% leciel,2) with the fuel oil low specific gravity value adjusted for worst case temperature effects and 3) with the fuel consumption rate based on the 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> rating electrical load.

7. Determine the Technical Specification fuel oil minimum volume compliance considering,

1) the storage tank filled to the 88% tank level,2) instrument inaccuracies and 3) temperature affects on the fuel oil high specific gravity value.

8. Determine the Technical Specification fuel oil minimum volume compliance considering,

1) the storage tank filled to the 88% tank level,2) instrument inaccuracies and 3) temperature affects on the actual recorded values of fuel oil specific gravity since 1/11/91.

II. FOR FUEL OIL DAY TANKS 3EGF*TK2A AND 3EGF*TK2B

1. Determine the capacity of the EDG. Fuel Oil Day Tank. For F.O. flow rates of 6.16 gpm i (the engine consumption rate - Ref. 7, Page 4-4) and 12 gpm (the engine - driven fuel pump capacity - Ref. 7, Page 4-4) discharging from the day tank, detennine the critical depth of vortex fonnation. Consider the effect of the depth of the vortex on usable day tank F.O.

volume and the D.G. run time.

Calculation 91-019-152M3 Rev. O Page 5 of 80

b OBJECTIVE (cont'd)

- 2. With the day tank filled to the low-low level alarm setpoint of 18" (3EGF-LS28 A&B -

Ref.11), determine the arn6 ant of usable F.O. and the D.G. run time.

3. With Ac day tanks filled to the low level alarm setpoint (23") (3EGF-LS29 A&B - Ref.

12), de. ermine the amount of usable F.O. and the D.G. run time.

4. With the tanks filled to the normal high level setpoint (40") and the normal-low level setpoint (30.5") of lead pumps PI A &PIB (including the variations in level due to instrument inaccuracy (t3") - 3EGF*LS40A/B - Ref.13), determine the amount of usable fuel oil and the corresponding D.G. run time. Account for the range of F.O. specific gravity of.83 .89 (Ref. 25).

5. With the day tanks filled to the normal high level setpoint (40") and the normal-low level setpoint (24") of follow pumps PIC and PID (including the variations in level due to instrument inaccuracy ( 3") - 3EGF*LS41 A/B - Ref.14), determine the amount of usable fuel oil and the corresponding D.G. run time. Account for the range of F.O. specific gravity of.83 .89 (Ref. 25).

6. With the day tanks filled to the Technical Specification (Ref. 9) minimum fuel oil volume of 205 gallons, determine the amount of usable F.O. and the D.G. run time.

7. Determine the total volume of fuel oil required at the normal low setpoint in the day tank in order to satisfy the ANSI N195-1976 (Ref. 23) requirement to " Maintain at least 60 minutes of operation at the level where oil is automatically added to the day tank. This capacity shall be based on the fuel consuraption at a load of 100% of the continuous rating of the diesel plus a minimum margin of 10%."

8. With the day tanks filled with 490 gallons of fuel oil per operating procedure OP-3346B (Ref. 22), determine the amount of usable F.O. and the D.G. run time.

ASSUMPTIONS

1. The level actuation setpoints derived in the setpoint calculations references 11 thru 14, were used in this calculation to determine gallons of fuel oil available in the day tank for those setpoints.

2. The fuel oil supplied to the diesel engine is not entirely consumed by the engine. A portion of the fuel oil is returned to the day tank and some is returned to the fuel oil storage tank.

The amount of fuel oil retumed to the storage tank has not been determined, however it is considered to be small. The engine fuel oil consumption rate at rated load, as specified in the Diesel Genentor specification (Ref. 7). is 6.16 gpm. This value was confirmed by site testing. (Ref. 36 ) Therefore, the run times of the diesel engine at rated load, corresponding to the various fuel oil volumes or levels in the storage and day tank, have been calculated based on the engine consumption rate of 6.16 gpm for rated load conditions.

l Calculation 91-019-152M3 Rev.0 l Page 6 of 80 l 1

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ASSUMPTIONS (cont'd)

3. The F.O. day tank has two 1" discharge lines six inches apart at the bottom of the tank.

One line supplies oil to the engine driven fuel pump and one line supplies oil to the DC el oil pump. Both pumps have a capac motor driven @6n of the Diesel Generatormeonly normal opersn the driven fueleng,ity of 12 gpm (Ref.

pump operates. 7). Du During D.G. start-up, the D.C. motor driven fuel oil pump operates until the engine comes up to speed, at which time operation of the D.C. motor driven fuel oil pump is terminated and the engine driven fuel pump operates. Further operation of the D.C. motor driven fuel oil pump will only occur in the event that low oil pressure is detected in the fuel oil pump discharge pipe. The reduced flow through each discharge line when both pumps are operating in parallel has not been identified by Coltex. In addition, no calculation method is known, (except for performing a test) to determine the depth of vortex formation for two adjacent lines discharging in parallel.

Based on the above, the critical depth of vortex formation is calculated for two cases -

6.16 gpm - engine consumption rate and 12 gpm - pump capacity through one suction line only.

4. Other assumptions used in Sections I. 6, I. 7 and I. 8 are included in those sections of this calculation.

METHODOLOGY Section 5.4 of ANSI N195-1976 (Ref. 23) provides guidance for calculating fuel oil storage requirements for standby diesel generators.

There are two methods recommended for calculating the storage volumes. The first method is based on the diesel generator (s) operating at the required capacity for the plant condidon which

'is most limiting and should consider the time dependence of the loads. The second method is  ;

identified as a conservative alternative to the first method and is based on a simple calculation  :

assuming the diesel generator (s) operate for 7 days at the continuous rated load. Millstone 3 took l cxception to the 7 day requirement and chose a 3-1/2 day run time (Ref.8). l Based on u . above, this calculation evaluates the diesel generator (s) run time utilizing both methods to assure the " worst case scenario" is addressed.

Therefore, for the F.O. Storage Tank, sections I. I through I. 4 of the calculation develop diesel run times utilizing a fuel oil consumption rate at the continuous rated load (4986 kWe - Ref. 7) of l the diesel generator. Sections I. 5 and I. 6 consider the 2000 hr. rating (5335 kWe - Ref. 7). The l maximum post accident load (5310 kWe - Ref. 37) is close to this 2000 hr. rating of the diesel.

The 2000 hr. rating was used for conservatism, as it is the maximum acceptable long term electrical load.

Other governing variables considered in the calculation of diesel run time include:

Specific gravity variances Adjustments fo.- temperature affects on S.G.

Level indication aui setpoint inaccuracies Adjustment for varying fuel oil consumption rates Calculation 91-019-152M3 Rev. O Page 7 of 80 j

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METHODOLOGY (cont'd) ,

The latest manufacturers' drawings were used to determine the overall dimensions and requirements of the:

1. Fuel Oil Storage Tanks,3EGF*TK1 A/IB (Ref 6 & 16)

2. Fuel Oil Day Tanks,3EGF*TK2A/2B (Ref.17)

3. Fuel Oil Transfer Pumps,3EGF*P1 A, PIB, PIC, P1D (Ref. 5)

Reference 7 was us'ed to determine the diesel engines fuel oil consumption rate at rated load. For l all other load cases in this calculation, the fuel consumption rate at the 2000 hr. rating was used, ,

based on the data provided in Reference 24.

References 11 thru 14 were used to determine the proper setpoints for the fuel oil transfer pumps start /stop operation and the fuel oil day tanks low & low-low level alarms.

Reference 28,29 and 30 were used to determine the critical depth of vortex formation in the day tank, which was converted to volume of unusable fuel oil.

By using industry accepted equations in conjunction with the above information, the fuel oil capacities for the fuel oil storage tanks and day tanks and the resultant diesel generator run times were calculated.

REFERENCES / DESIGN INPUTS

1. "The Power Handbook," 2nd Edition by the Editors of Power Magazine, Copyright 1983 by McGraw Hill,Inc. (See Attachment 1)

2. ' S&W Dwg. No.12179-EM-117A-7: P&ID Emergency Generator Fuel Oil System, including change documents DM3 P-063-90 and DM3-S-0801-91

3. S&W Dwg. No.12179-EP-60A-8: Piping Emergency Generator Encl. - Sh.1, including change documents DM3-S-0801-91 and F-P-32343

4. S&W Dwg. No.12179-EP-60B-8: Piping Emergency Generator Encl. - Sh. 2, including change document DM3-S-0801-91

5. Goulds Pump Dwg. No. D1709 - Rev. E2, Dated 6/1159(SWEC Dwg. No. 2447.200-043-001, Rev. F) for Fuel Oil Transfer Pumps 3EGF* pal, P1B, P1C, P1D

6. National Annealing Box Co. Dwg. No. NS5990, Rev. IV. Date 5/9n7,(SWEC Dwg. No.

2100.380-031-005, Rev. E) for Fuel Oil Storage Tanks 3EGF*TK1 A, TK1B, including change documents F-P-30509, F-P-31256, F-P-32342, NF-11999 and NF-15590 4

Calculation 91-019-152M3 Rev. O ~

Page 8 of 80

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-l REFERENCES / DESIGN INPGT3 (cont'd)

7. Emergency Diesel Generator Systems: SWEC Specification No. 2447.300-241, Rev. 2, dated Il-15-84 including the following change documents.

DM3 P-0013-91 F-E-10990 N-ME-00878 1 DM3-P-0164-91 F-E-17232 N-ME-00924  :

DM3-P-0177-91 F-E-22858 N-ME-01582 l DM3-P-0182-91 F-E-32674 N-ME-01654 l DM3-P-0190-91 F-E-32879 N-ME-01665 F-C-32625 F- E-33313 N-ME-02933 F-C-33856 F-E-34342 N-ME-03062 F-C-34900 F-E-35472 NF-02173 l T-C-01934 F-P-44283 NF-05402 T-C-02010 N-CS-04317 NF-06101 T-C-02074 N-EC-00904 NF-06358 i T-C-04300 N-EC-00939 NF-07009 l T-C-04533 N-EC-00996 NF-07457 l T-C-04596 N-EC-01094 NF-08479 T-C-04637 N-EC-01194 NF-10490 T-C-05028 N-EC-01999 NF-12644 T-C-05936 T-E-01921 NF-15059 T-C-07837 T-E-01988 NF-15219 T-C-01210 T-E-02179 NF-15220 T-C-01521 T-E-02393 P-E-04325 T-C-01614 T.E-02724 P-E-06770 T-C-01628 T-E-02800 V-00142 T-J-06964 T-E-03653 V-01873 T-J-07118 T-E-05389 V-04697 T-P-01600 T-E-06344 T-P-01987 T-E-07710 T-P-02080 T-E-07873 T-P-02592 T-E-07905 T-P-03436 T-E-01104 T-P-04422 T-E-01491  !

T-P-07134 T-E-01734 .

T-P-07450 T-E-01104 T-P-07513 T-E-01491 T-P-07764 T-E-01734 T-P-07904 T-P-07930 T-P-07956

8. Millstone Nuclear Power Station Unit 3, Final Safety Analysis Report, through change 15 dated 6/30/92; Section 8.3: On-site Power Systems, Section 9.5: Other Auxiliary Systems, and Section 3.11. Environmental Design of Mechanical and Electrical Equipment l (Appendix 3B) I

9. Technical Specification - Millstone Nuclear Power Station Unit 3 Docket No. 50-423, Appendix "A" to License No. NPF-49 dated January,1986 with change notices through No. 75 dated 5/12/92 - Section 3/4.8 Electrical Power Systems Calculation 91-019-132M3 Rev. O Page 9 of 80

REFERENCES / DESIGN INPUTS (cont'd)

10. Not Used

11. Setpoint Calculation: 12179-SP-3EGF-5, Rev.1. dated 6/21/84, (No outstanding CCN's) 3EGF-LS28A&B Level Switch on Day Tanks 3EGF*TK2A & TK2B -low-low level alarm

12. Setpoint Calculation: 12179-SP-3EGF-6, Rev. 3., dated 9/19/85 (including CCN #1 dated 7/8/92 ) 3EGF-LS29-1 A&B Level Switch that indicates Low Level in Day Tanks 3EGF*TK2A & TK2B -low level alarm

13. Setpoint Calculation: 12179-SP-3EGF-11 Rev. O. dated 10/30/85, (No outstanding CCN's) 3EGF*LS40A/B, High Oil Level Switch for 3EGF*TK2A/B. Trips 3EGF"'PI A/B

14. Setpoint Calculation:.12179-SP-3EGF-12 Rev. 0., dated 6/26/85, (No outstanding CCN's) 3EGF*LS41 A&B for Fuel Oil Day Tank Level Switch Stops 3EGF*PIC/D on high level.

Starts 3EGF*PIC/D on low-low level.

15. NUSCO Letter, NEC-105, dated 10-25-72

16. National Annealing Box Co. Dwg. No. NS5991 Rev. II dated 9-25-75.(SWEC Dwg.

No.2100.380-031-006, Rev. C) For Fuel Oil Storage Tanks 3EGF*TKI A and 3EGF*TKlB, including change documents F-P-30509, F-P-32342, F-P-31256 and NF-15590

17. PX Engineering Company, Inc. Dwg. No. 473-6, Rev. 2, Sh. 1, dated 6/24/75, (SWEC

! Dwg. No. 2140.428-022-001, Rev. C) Emergency Generator Fuel Oil Day Tanks, including change documents NF-15647 and T-P-04290

18. 3EGF*P1 A, P1B, PIC, P1D Data, Spec. No 2447.200-043, page 3-2, Rev. O, Add. 3,6 82, including change documents F-P-44283, P-B-05605 and T-E-07239.

19. Perrys Chemical Engineers' Handbook,6th Edition

20. E&DCR No. T-P-04290, dated 4-11-85

21. Setpoint Calculation: 12179 SP-3EGF-2 Rev. O., dated 1/18/84, (No outstanding CCN's) 3EGF-LS25A&B Level Switch for the Fuel Oil Storage Tanks,3EGF*TKl A&lB. Actuates low level alarm on the EG Panel when the height in the Fuel Oil Storage Tanks decreases to 24" above tank bottom.

22. Operations Procedure OP-3346B, Rev. 4, dated 4/30/92, Diesel Fuel Oil

23. ANSI N195-1976, " Fuel Oil System for Standby Diesel Generators"

24. Calculation 12179-P(T)-1195 Rev. O, dated 11/15/85, (No outstanding CCN's) Length of Operation of Emergency Diesel Generators During Accident Conditions (Alternate Loading Schemes)

25. New Fuel Oil Delivery Sampling - SP-3646B.7, Rev. 2, dated 5/27/92 Calculation 91-019-152M3 Rev. O Page 10of 80

4 REFERENCES / DESIGN INPUTS (cont'd)

E

26. Calculation No. 92-LOE-160E3, Rev. O, dated Aug. 18,1992, MP3 EDG F.O. Storage Tank Level Loop Uncertainty

27. OPS Form 3646A.2-1, Rev. 5, dated 8/29/90, EDG Operability Test

28. A. Jacob Odgaard. " Free-Surface Air Core Vortex", Journal of Hydraulic Engineering, Vol.

112 No. 7; July 1986 i 29. Y.R. Ready; J.A. Pickford. " Vortices at Intakes in Conventional Sumps", Water Power; March 1972

30. J.L. Gordon. " Vortices at Intakes", Water Power, April 1970

31. E.F. Brater, H.W. King. " Handbook of Hydraulics 6th Ed", McGraw Hill 1976

32. Crane Technical Paper No. 410, Flow of Fluids,18th printing; Crane Co.; 1979

33. New Fuel Oil Deliver 30 Day Sampling - OPS Form-3646B.7-1 Rev. 3, CN. 001, dated 4/3/92, Page 2 of 2

34. Cameron Hydraulic Data - 17th Edition

35. Not Used.

36. Diesel Generator Site Test Reports T3346AP001, Rev. O and T3346AP002, Rev. 0

37. NU Calculation No. NL-033, Rev.1, (draft), Emergency Diesel Generator Loading and Starting KVA Calculation.

I

38. Telephone Memorandum between W.C. Faye and B. Balistreni, dated 8/12/92 Calculation 91-019-152M3 Rev.O Page 11 of 80

l

SUMMARY

OF RESULTS i

The following is a tabulation of the results of this calculation as they pertain to the Diesel i Generator Fuel Oil Storage Tanks (3EGF*TKI A and 3EGF*TK1B) and Diesel Generator run times. These results are based on a fuel consumption rate of 6.16 gpm (Ref. 7) at 100% ,

rated load.

Diesel Gen. Run Time Fuel Oil Storage Tank Minimum Diesel Considering Loop Accuracy Oil Content (Gal /% Pump Generator Tolerance Tank Level /% Tank Submergence Run Time Run Time Volume) (Inches) (Days) Tolerance (Days) 35340 Gallons (Full Tank - Ref. 6) 12" 3.62 (pg. 20) NA -

95% TK. Level-Ref. 22 (F.O. Spec. Grav. = .83)

(35301 Gal) 12" 3.62 (pg. 21) Note 1 -

95% TK Level-Ref. 22 (P.O. Spec. Grav. = .89) +1.15% 3.52 (pg. 23)

(34219.72 Gal) 12" 3.49 (pg. 22) - 1.15% 3.46 (pg. 23) 32760 Gallons (Tech. Spec.-Ref. 9) 12" 3.32 (pg. 24) NA -

32760 Gallons (Tech. Spec.-Ref. 9) 5" (pg. 26) 3.5 NA -

88% TK Level-Ref. 27 (F.O. Spec. Grav. = .83)

(34074.83 Gal) 12" 3.48 (pg. 28) Note 1 -

88% TKlevel-Ref. 27 (F.O. Spec. Grav. = .89) +1.15% 3.33 (pg. 30)

(32413.85 Gal) 12" 3.29 (pg. 29) - 1.15% 3.25 (pg. 30)

Note 1 - The F.O. Storage Tank Level Indicator from plant computer point EGF-L25A has an accuracy ofi 1.15% (1.2" W.C.) (Ref. 26). This tolerance has not been accounted for in these cases since they are not the controlling cases.

Calculation 91-019-152M3 Rev. O Page 12 of 80

SUMMARY

OF RESULTS (cont'd)

The following is a tabulation of the results of this calculation as they penain to the Diesel Generator Fuel Oil Storage Tanks (3EGF*TKI A and 3EGF*TK1B) and Diesel Generator run times. These results are based on the fuel consumption rate at the 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> ratine (Ref. 7

& 24) with adiustments made for specific cravity variations.

Fuel Diesel Gen. Run Time I Fuel Oil Storage Tank Consumpt. Considering Loop Accuracy l Oil Content (Gall % Rate - 2000 Tolerance Tank Level /% Tank Specific Hour Rating Run Time Volume) Gravity (Gal / Min) Tolerance (Days) 95% TK. level - (Ref. 22) Note 1 -

(35301 Gal.) .82 6.80 -1.15% 3.27 (Pg. 40) 95% TK.12 vel - (Ref. 22) Note 1 - ,

(35192 Gal.) .83 6.72 - 1.15% 3.30 (Pg. 37) !

95% TK Level - (Ref. 22) Note 1 -

(33958 Gal) .89 6.27 1.15 % 3.41 (Pg. 37) 88% TK Level - (Ref. 27) Note 1 -

(34057 Gal.) .82 6.80 -1.15% 3.15 (Pg. 40) 88% TK Level - (Ref. 27) Note 1 -

(33813 Gal.) .83 6.72 - 1.15 % 3.16 (Pg. 37) 88% TK Level - (Ref. 27) Note 1 -

(32071 Gal.) .89* 6.27 -1.15% 3.20 (Pg. 37)

• In addition to the above,it was determined that based on the maximum S.G. of fuel oil deliveries received on-site since 1/11/91, with adjustments made for temperature, the minimum technical specification F.O. system volume of 32760 gallons is satisfied (i.e.,74 gallons short) when credit is taken for the fuel oil day tank volume and normal system operation. (Page 43)

Note 1 - The F.O. Storage Tank Level from plant computer point EGF-L25A has an accuracy of i 1.15% (1.2" W.C.) (Ref. 26). This tolerance has not been accounted for in these cases since they are not the controlling cases.

Calculation 91-019152M3 Rev. 0 Page 13 of 80 l

-. . _= _- =_ - .. .

,1 l

SUMh1ARY OF RESULTS (cont'd) 1 Tables 1,2 and 3 contain the results of this calculation as they pertain to the Diesel Generator Fuel Oil Day Tanks (3EGF'TK2A and 3EGF*TK2B). These results are based on the fuel consumption rate at rated load.

The critical depth of vortex formation in the day tanks and the corresponding unusable fuel

oilis identified below.

Vortex Deoth Unusable F.O. (GAL)* )

Case 1 Engine Fuel 2" 22.17* (Page 53)

Consumption at Rated l Load (6.16 GPM) l l

Case 2 Fuel Pump Capacity 4 1/2" 45.13* (Page 53) 1 I

(12 GPM)

• The amount of unusable fuel oil includes the contribution of unusable fuel oil from the 2" penetration of the suction line into the day tank.

I l

'i I

9 l

-l x

i l

Calculation 91-019152M3 Rev.O Page 14 of 80

SUMMARY

OF RESULTS (cont'd)

TABLE 1 - F.O. DAY TANK RESULTS USABLE F.O. LENGTH OF VOLUME OPERATION AVAILABLE (GAL + 6.16 GPM) =

REFERENCE FUEL OIL LEVEL (GALLONS) MINUTES SETPOINT CALC. ABOVE DAY TANK 2" 41 /"

2 BOTrOM VORTEX VORTEX 2" 41 /" 2 (inches) CASE' CASE VORTEX VORTEX SP-EGF 11 Rev.0 lead 43 high-high actuation point 500 476.87 81.1 77.4 pumps PI A & PIB Actuation. 40 normal-high setpoint 471 447.87 76.4 72.7 Setpoints 37 low bigh actuation point 436 412.87 70.7 67.0 The accuracy of these

instruments is 3.0" 33.5 higb-low actuation point 391 367.87 63.4 59.7 (instrument 3EGF*LS40A/B) 30.5 normal low set point 350 326.87 56.8 53.1 27.5 low-low actuation point 307 283.87 49.8 46.1 (Note 1) (Pg.56) (Pg.56)

SP EGF-12-Rev.0 follow 43 higb.high actuation point 500 476.87 81.1 77.4 i pumps PIC & PID Actuation

- Setpoints 40 normal-high setpoint 471 447.87 76.4 72.7 n 'Ibe accuracy of these 37 low-high actuation point 436 412.87 70.7 67.0 instruments is i3.0* (instnunent

! 3EGF*LS41 A/B) 27 high-low actuation point 300 276.57 48.6 44.9 24 normal-low setpoint 256 232.62 41.5 37.8 1

21 low low actuation point 212 188.51 34.3 30.6 (Notc 1) (Pg. 69) (Pe.69) 241 217.87 39.1 35.37 l SP EGF-6-Rev. 3 low level 23 abrm 3EGF-LS29-1 A&B (Note 2) (Pg. 55) (Pg.55)

SP EGF 5-Rev.1 low-low 18 168 144.87 27.2 23.51  !

s alarm 3EGF-LS28 A&B (Note 3) (Pg. 53) (Pg.53) ,

l Note 1 - The process setpoints above are based on F.O. specific gravity of.825 (= .83).

Note 2.- This setpoint is based on specific gravity of fuel oil of.833.

1 Note 3 - This setpoint is based on specific gravity of fuel oil of.88.  ;

t Calculation 91-019-152M3 Rev.O Pag:15 of 80 1

1

.= ._. _ _ _ .

SUMMARY

OF RESULTS (cont'd)

TABLE 2 - F.O. DAY TANK RESULTS l (FUEL OIL SPECIFIC GRAVITY = 0.89)

US ABLE F.O. VOLUME LENGTil OF OPERA 710N REFERENCE FUEL OIL LEVEL AVAILABLE (GALLONS) (GAL + 6.16 GPhD = MINtJFES SETPOINT CALC. ABOVE DAY TANK BOTTOM ONCIES) 2" VORTEX 41/ 2* VOR7EX l CASE CASE 2" VORTEX 4 1/ 2" VORTEX !

SP EGF-11 Rev.0 41.53' liigh liigh Act. Pt. 486.90 463.77 79.N 75.29 lead Pump PI A &  !

P1B Actuation Set 38.53' Normal Iligh Set Pt. 454.68 431.55 73.81 70.06 '

Point Onstrument 35.53' Low lligh Set Pt. 418.03 394.90 67.86 64.11 l Accuracy 13.0-)

Instrumcot )

3EGPIS40A/B 32.72* Ifigh-14w Act. Pt. 380.82 357.69 61.82 58.07 i 29.72* Normal-Low Act. Pt. 338.97 315.84 55.03 51.27 l

l 26.72* 14w Low Act. Pt. 295.68 272.55 48.0 44.25  ;

(Note 1) (Pg. 63) (Pe. 63)  !

l SP-EGF 12 Rev.0 The liigh Actuation Set -+ -+ -+ -+

Follow Pumps PIC Points Are The Same As The

& PID Actuation Set Lead Pumps Above (SP- 1 Polnts Onstrument EGF 11.R.0)  ;

Accuracy 13.0*) i Instrument 26.7 liigh-Low Actuation Pt. 295.40 272.27 47.95 44.20 )

3EGF*LS41 A/B 23.7 Normal Low Act. Pt. 251.31 228.18 40.8 37.M 1 1

20. 7 Low-Low Act. Pt. 207.29 184.16 33.65 29.9 l

(Note 1) (Pe.73) (Pg. 73)

Note 1 - The process setpoints above reflect fuel oil with a specific gravity of .89. ,

4 I

l I

Calculation 91-019152M3 Rev.O Page 16 of 80

4

SUMMARY

OF RESULTS (cont'd)

TABLE 3 - F.O. DAY TANK RESULTS LENGTH OF OPERATION EQUIVALENT FEIGHT OF (GAL + 6.16 GPM) F.O. ABOVE TANK BOTTOM I USABLE F.O. VOLUME FUEL OIL DAY AVAILABLE (GALLONS) = MINUTES (TNCHES) l TANK OIL 2" VORTEX 41 / 2" VORTEX 2" VORTEX 4 1

/ "

2 VORTEX 2" VORTEX 4 1/ 2" VORTEX ,

CONTENT CASE CASE CASE CASE CASE CASE Tech. Spec.

Minimum F.O. Day Tank Volume (Ref, 9) 205 Gal. 183 (Pg. 76) 160 (Pg. 76) 29.7 26.0 not rea'd not rea'd Minimum F.O. Day Tank Volume to Satisfy ANSI N195 1976 (60 minutes of operation at i10%

1md) 407 (Pg. 77) 407 (Pg. 77) 60 60 35" 36.5" F.O. Day Tank Volume of 490 Gallons based on Operating Procedure OP3346B 468 (Pg. 79) 445 (Pg. 79) 75.9 72.2 not rea'd not rea'd 2

1 f

Calculation 91419-152M3 Rev. 0 Page 17 of 80

BODY OF CALCULATION The Emergency Diesel Generator System consists of two (2) 100 per-cent capacity Colt-Pielstick Engines, Model PC-2, and Type 4 Cycle V 14. Each Diesel Engine is rated at 6941 BHP continuous duty with a fuel consumption rate, at rated load and speed, of 6.16 GPM. The Diesel Engine operates on Type No. 2 Diesel Fuel Oil. (Ref. 7)

The Fuel Oil Storage System for the Diesel Engines consists of two (2) Fuel Oil Storage Tanks, 3EGF*TKI A and 3EGF*TKlB, and Independent Fuel Oil Day Tanks for each Diesel Engine, 3EGF*TK2A and 3EGF*TK28. (Ref. 2)

I. FUEL OIL STORAGE TANKS 3EGF*TK1 A cr 3EGF*TK1B

1. Determination Of The Diesel Engine Run Time Based On A Filled (35340 Gal- Ref.

6) F.O. Storace Tank And 12" Pump Submergence (Ref.18)

> To Fuel Oil Day Tank 3EGF*PI A 3EGF*Pic Ref. 2 L (3EGF*PIB) L (3EGF*PtD)

V V __

s l Ak l l 126" I I OD V

+ 23 3/81 '

53' - 0" Ref. 6 for Lengths Tank Volume = 35,340 Gal, Ref. - 6 .

Tank ID = 125 Ref. - 16 (126" - (2 x l/2")

Total Distance From the Tank

^

Bottom to the Top of EGF Transfer Pumps Mounting Flange. 1311 /2" Ref.16 EGF Transfer Pump Sub-base (Pump Spacer) 13 /8" Ref. 5 Total Length I = 1327/8" Total EGF Transfer Pumps Length - 1291 /2" Ref 5 Actual Distance of EGF 33/8" Transfer Pump off Tank Bottom Calculation 91-019-152M3 Rev.O Page 18 of 80

BODY OF CALCULATION (cont'd)

Determine the minimum level of fuel oil, as required by the EGF Transfer Pumps Manufacturer, above 33/8" to provide proper EGF Transfer Pump Operation. ,

1 3 3/g-Distance from the Bottom of the EGF Transfer Pump to its Suction Bell. 3" Ref. 5 Minimum submergence required above the EGF Transfer Pump Suction Bell. 12" Ref.18 183 /8" 183/8" is the minimum fuellevel in the Fuel Oil Storage Tanks that can be tolerated in order to assure proper EGF Transfer Pump operations.

Based on this fuel oil level, a maximum usable fuel oil capacity can be determined. This maximum usable fuel oil capacity is based on the assumpdon that the Fuel Oil Storage Tanks are filled to their capacity of 35,340 gallons.

A. Maximum Usable Canacity Tank I.D. 125"

-l8 3/8" 1065/8 Height of Fuel Oil to the top of Tank

- From 183/8" From Ref. I determine the Volume Ratio for 1065 /8" of fuel oil height.

1065 /8"

= .853 by Depth Rado 125" At a Depth Ratio of.853 determine the corresponding Volume Ratio Volume Ratio = .9086 (Ref.1 - Attachment 1)

Maximum Usable Capacity = .9086 x 35,340 Gal. = 32,1:0 Gallons of Fuel Oil for each Fuel Oil Storage Tan.k.

Unusable Capacity = 35340 - 32110 = 3230 Gal Based on the above maximum usable capacity of 32,110 gallons of Fuel Oil, determine the length of operation for one Diesel Engine based on the previously stated 6.16 GPM Fuel Oil Consumption Rate.

Calculation 91-019-152M3 Rev. 0 Page 19 of 80

J'.

i l

BODY OF CALCULATION (cont'd)

B. Length Of Oncration Length of Operation = 32.110 Gal x 1HR x 1 Day 6.16 Gal / Min 60 min 24 Hr

= 3.62 days of operation for each Diesel Engine i This length of operation is in compliance with NUSCO Letter, NEC-105 dated 10/25/72, (Ref.15) which required the Emergency Diesel Generator Fuel Oil Storage Tanks to be sized for 3.5 days of fuel oil storage capacity each.

Note - For Information: Ref. 21 has set a Low Fuel Oil Level Alarm in the Fuel Oil Storage Tanks at 24" above Fuel Oil Storage Tank Bottom. This alarm will alert the operator before the Fuel Oil Level may become unacceptable for EGF Transfer Pump Operation.

2. Determination Of Run Time Based On The 95% Fill Level Of The F.O. Storage Tank As Specified In Operations Procedure OP-3346B (Ref. 22)

OP-3346B (Ref. 22) Parag. 7.6.1.5 states " Fill appropriate tank, not to exceed 95% as indicated by computer point EGF-L25A(B)."

The level transmitter (3EGF-LT25A) from which the F.O. storage tank level is measured has a span of 105". The low point of the span starts 4" (Ref. 21) above the tank bottom. The following calculation is done to determine the actual level (and volume) of F.O. in the tank when a specific level, as specified in procedure OP-3346B (Ref. 22) is read from the plant computer [ point EGF-L25A(B)].

Operating procedure OP-3346B (Ref. 22) specifies that the F.O. should be added to the F.O.

storage tank not to exceed 95% by level. Since the span of the instrument is 105" "W.C."

(Water Column), a 95% level would be .95 x 105" = 99.75" W.C.. The specific gravity of #2 diesel F.O. received on-site is in the range of .83 .89 (Ref. 25).

The actual level of F.O. in the tank is then determined as follows for the high and low range values of the S.G.

CASE 1 At 95% level reading and S.G. of .83, the actual level of oil in the tank is:

99.75" (W.C.) + 4" (Start pt. of instr. span) = 124.18" inches of oil

.83(S.G.)

CASE 2 At 95% level reading and S.G. of .89 the actual level of oil in the tank is ,

5"

+ 4" = 116.08" inches of oil 9

Calculation 91-019-152M3 Rev. O Page 20of 80

BODY OF CALCULATION (cont'd)

For Case I with F.O. spec. gravity of .83 the actual level of F.O. in the tank is 124.18" inches of oil.

124 18 Depth Ratio = 125.00.", = .9934 DEIYTH RATIO VOL. RATIO

.99 .9983

.9934 Y 1.00 1.000

.0034 _ X

.01 .0017 X = .0006 Y = .9983 + .0006 = .9989 Vol. Ratio Therefore, F.O. Vol. at 95% = .9989 x 35340 = 35301 Gal.

Vol. and (.83) Spec. Gravity As previously calculated there are 3230 gallons of unusable F.O. in the storage tanks.

Therefore the usable F.O. is 35301 - 3230 = 32071 Usable F.O.

Run Time = 6.16 g m = 5206.33 Minutes = 3.62 Days l

For Case 2 with F.O. spec. gravity of .89 the level of F.O. in the tank is 116.08" inches of oil.

I16.08" l Depth Ratio = 125.00,, = .9286 l l

DEEYTH RATIO VJQLJRATIO l 1

.92 .9625  !

.9286 Y l I

.93 .9692

.0086 X

.01 .0067 l X = .0058 Y = .0058 e .9625 = .9683 Vol. Ratio Therefore, F.O. Vol. at 95% = .9683 x 35340 = 34219.72 Gal.

Vol. and (.89) Spec. Gravity Calculation 91419-152M3 Rev. 0 Page 21 of 80

BODY OF CALCULATION (cont'd)

As previously calculated there are 3230 gal.lons of unusable F.O. in the storage tank.

Therefore the usable F.O. is 34219.72 - 3230 = 30989.72 Usable F.O.

Run Time = f16 g = 5030.80 Minutes

= 3.49 Days Plant computer point EGF-L25A, which measures the F.O. storage tank level, has an accuracy ofil.15% (1.2" W.C.) (Ref. 26). The following calculation is performed to determine the impact that this 1.15% tolerance will have on the Case 2 condition, i.e.,95%

level and S.G. of .89. Per the preceding Case 2 calculation, the 95% level results in 5"

(withoutil.15% Tol. ) == 99 + 4" = 116.08 inches of oil To consider the il.15% (1.2" W.C..) tolerance, the following variations on inches of oil would result:

+1.15% Tol. == j + (9 75") 9 + 4" = 117.43 inches of oil 1.15% Tol =o (j'2) + (9 75") + 4" = 114.73 inches of oil 9

The resulting volumes of F.O. that corresponds to this il.15% tolerance is detennined below:

For +1.15% (1.2") =o Depth Ratio = II125 " = .9394 of 95% Level DEFTH RATIO VOL. RATIO

.93 .9692

.9394 Y

.94 .9755

.0094 _ X

.01 .0063 X = .0059 Y = .9692 + 0059 = .9751 Vol. Ratio Therefore, F.O. Vol. at 95% Vol.

+1.15%(1.2") and (.89) Sp 'c. Gravity = .9751 x 35340 = 34460.0 Gal.

Calculation 91419152M3 Rev.0 Page 22 of 80

l BODY OF CALCULATION (cont'd)

As previously calculated here are 3230 gal. of unusable F.O. in the storage tank. Therefore the usable F.O. is l 34460.00 - 3230 = 31230.0 Usable F.O.

31230.00 gal '

i Run Time = = 5069.8 mm.

6.16 gpm

= 3.52 days f I For the -1.15% tolerance case of 95% level Depth Ratio = 114.73"125.00" = .9178 DEFTH R ATIO VOL. R ATIO

.91 .9554

.9178 Y ,

.92 .9625 a

.0078 X

.01 .0071 j X = .0055 Y = .9554 + .0055 = ' .9609 Vol. Ratio l l I i Therefore, F.O. Vol. at 95% Vol. I

(-1.15%) and (.89) Spec. Gravity = .9609 x 35340 = .33958.20 Gal. l As previously calculated there are 3230 gal. of unusable F.O. in the storage tank. Therefore i the usable F.O. is

i 33958.20 - 3230 = 30728.20 gal. Usable F.O.

! 30728.20 Run Time = 6.16 gpm = 4988.22 Minutes

= 3.46 Days l

1 Calculation 91-019-152M3 Rev.O Page 23 of 80 I-

BODY OF CALCULATION (cont'd)

3. Determination Of D.G. Run Time Based On The Tech. Spec. (Ref. 9) Minimum Volume Of 32.760 Gallons in The F.O. Storace Tank and Determination of Reduction in Pump Submergence Re. quired to Allow 3.5 days of Diesel Run Time.

The unusable amount of Fuel Oilin the tank is determined as follows:

35,340 Full Tank Capacity 1

-32.110 Max Usable Caoacity (Based On 12" Pump Submergence)-+ 3,230 Gallons Unusable Fuel Oil (As previously calculated) i The Tech Spec. (Ref. 9) minimum volume of F.O. in the Storage Tank is 32,760 gallons I (usable and unusable). Based on this volume of oil, the Usable Volume is 32760 gal- 3230 gal = 29. 530 Gallons Usable Fuel Oil The run time based on this Usable Volume of oil (29,530) is Run Time = Volume = 29530 Gal. = 4793.83 Min.

Consumption Rate 6.16 Gal / Min Run Time (Days) = 4793.83 Min 1440.00 Min / Day Run Time Based On The Tech. Spec. = 3.32 Days Minimum Volume of 32760 Gal.

The run time of 3.32 days does not satisfy the 31 /2 day requirement of the FSAR (Ref. 8).

Therefore, the following calculation determines the reductmn in pump submergence required

ir; order to provide a 31/2 day Usable Fuel Oil Supply from the Tech. Spec. (Ref. 9)

Minimum Volume of 32760 total gallons.

From Ref. 9, the minimum volume of F.O. in the storage tank is 32,760 Gal. Per Ref. 8 the F.O. Storage Tank is required to contain enough F.O. for 31 /2 days of cperation of the D.G.

Per Ref. 7, each D.G. consumes 6.16 GPM of oil, therefore the amount of Usable Fuel required in each tank is determined as follows:

Required Usable Vol. = Consumption (Gal / Min) x Min (31 /2 days)

Required Usable Vol. = 3.5 day x 24 hrs / Day x 60 Min /Hr x6.16 Gal / Min Required Usable Vol. = 31046.4 Gallons Therefore the amount of UNUSABLE F.O. in the tank would be limited to the following amount when the tank is filled to the Tech. Spec. Limit 32760 - 31047 = 1713 Gal. Max Unusable F.O. when the tank is filled per the Tech. Spec. with a 31 /2 Day run time.

Calculadon 91-019152M3 Rev.0

, Page 24 of 80

4 BODY OF CALCULATION (cont'd)

Using the UNUSABLE amount of F.O. (1713 Gal.), determine the height of oil (Submergence) off the bottom of the tank that this corresponds to:

Total TK Vol. = 35340 Unusable Vol.

Per Tech. Spec. = -1713

= 33627 Gal. Usable Fuel Per Ref.1: Usable Vol. = Vol. Ratio x Total Tank Vol.

= Vol. Ratio = .9515 Per Ref.1: He depth Ratio that corresponds to this Volume Ratio is detennined as follows.

DfEDiPATJD VOL. RATIO

.90 .9480 Y .9515

.91 .9554

_X_ = . 0019

.01 .0074 r

X = .0053 Y = .91 .0053 Y = .9047 Death Ratio Tank I.D. = 125" Actual Depth of = _2- = .9047 Usable Vol. 125" '

Z = .9047 x 125" = 113.09" ne Depth of Unusable F.O.

in the Tank is:

125" - 113.09" = 11.91".

Say 12" = Deoth of Unusable F.O. Allowed Calculation 91-019-152M3 Rev.O Page 25 of 80

BODY OF CALCULATION (cont'd)

The new required submergence above the bottom of the suction bell would be determined as follows:

12" <-- Total Unusable Depth

- 33/8" Depth from Bottom of Tank to Bottom of Pump.

- 3" Depth from Bottom of Pump to Bottom of Suct. Bell. (Ref. 5) 1/8" 5

• Say 5" This would be the Pump Revised Submergence (in lieu of 12" submergence currently specified by the Pump Vendor) to have a 3-1/2 day Usable Supply of Fuel Oil assuming the Tech. Spec. Volume of 32,760 gallons and a consumption rate of 6.16 GPM.

l f

a i

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i Calculation 91019-152M3 Rev.O Page 26 of 80

.__.__.____2___ , -

BODY OF CALCULATION (cont'd)

4. Determination Of Run Time Based On The 88% Fill Level Of The F.O. Storage Tank As SpeciGed In Oncrations Procedure OP-3346B (Ref. 22)

OPS Form 3646A.2-1 (Ref. 27) specifies that 88% of tank level corresponds to 32760 gallons. The following calculation is performed to determine what the actual level (and corresponding volume)is in the storage tank when the gauge reads 88% level.

The initial presumed level would be

.88 x 125" = 110" F.O. (Tank I.D. = 125")

The volume this corresponds to is Depth Ratio = ., = 8 8 %

Vol. Ratio = .9320 (Ref.1)

Total Vol. = .9320 (35340) = 32936.88 Gal.

NOTE => 32936.88 Gal. is slightly greater than the 32760 Gal. specified on the OPS form.

A3 liscussed earlier for the 95% level case, the level transmitter (3EGF LT25A) from which the J.O. storage tank level is measured has a span of 105". The low point of the span starts 4" above the tank bottom.

Since the span of the instrument is 105" W.C., a 88% level would be .88 x 105" = 92.4".

The specific gravity of #2 diesel F.O. received on-site is in the range of .83 .89 at 60*F.

(Ref. 25)

The actual level of F.O. in the tank is then detennined as follows for the high and low range values of S.G.

Case 3 At 88% level reading and S.G. of.83 the actual level of oil in the 'ank is

+ 4" (Start Pt. ofInstr. Span.) = 115.33 inches of oil.

83 )

Case 4 At 88% level reading S.G. of.89. the actual level of oil in the tank is 92.4"(W.C.)

.89

+ 4" = 107.82 inches of eil Calculation 91-019-152hi3 Rev. 0 Page 27 of 80

1 i

BODY OF CALCULATION (cont'd)

The volume of F.O. that corresponds to these levels of oil is calculated below:

Case 3 - Tank Level - 115.33" Depth Ratio = .9226 1 5.-

DEFYIB RATIO VOL. RATIO

. 92 .9625

. 9226 Y

. 93 .9692

.0026 _ X

.01 .0067 X = .0017 Y = .0017 + .9625 = .9642 Vol. Ratio Therefore, F.O. Vol. at 88%

level and (.83) Spec. Gravity = .9642 x 35340 = 34074.83 Gal. F.O.

As previously calculated there are 3230 gallons of unusable F.O. in the storage tank.

Therefore the usable F.O. is:

34074.83 - 3230 = 30844.83 Usable F.O.

Run Time = 6 6 GI hi = 5007.28 Min. = 3.48 Days Case 4 - Tank Level - 107.82" I

Depth Ratio I25.' . = .8626 DEFrrH RATIO VOL. R ATIO

. 86 .9149

. 8626 Y

. 87 .9236

.0026 _ X

.01 - .0087 X = .0023 Y = .0023 + .9149 = .9172 Vol. Ratio F.O. Vol. at 88% level = .9172 x 35340 = 32413.85 Gal. l and (.89) Spec. Gravity l

Calculadon9l-019152M3 Rev.O Page 28 of 80 l

, , . - ~. _.

l BODY OF CALCULATION (cont'd)

As previously calculated there are 3230 gallons of unusable F.O. in the storage tank.

Therefore the usable F.O. is: ,

32413.85 - 3230 = 29183.85 Gal Usable F.O.

= 4737.64 Min. = 3.29 Days Run Time = 6. P A il.15% tolerance will now be reviewed for the Case 4 conditions where we have 88%

level and S.G. of.89.

Per the preceding Case 4 calculation the 88% level without tolerance results in the following:

92.4"

.C.) + 4" = 107.82 inches of oil Considering +1.15% Tol. of 88%

inches of oil 9 + (92.4") + 4" = 109.17 Considering -1.15% Tol. of 88%

~I'

+ (92'4~) + 4" = 106.47 inches of oil

.8 .89 The resulting volumes of F.O. that corresponds to the 88% level condition, spec. gravity of

.89 and tolerance ofil.15% is determined below

For +1.15% Depth Ratio = ~ ,[ = .8734 5 l 1

DEPTH RATIO VOL. RATIO l 1

.87 .9236  !

.8734 Y ~

.88 .9320

.0034 X l

.01 .0084 I l

X = .0029 l Y = .9236 + .0029 = .9265 Vol. Ratio  !

l Therefore, F.O. Vol. at i 88% Vol. (+1.15% Tol) = .9265 x 35340 = 32742.51 Gal, and (.89) Spec. Gravity l

Calculation 9l-019152M3 Rev.O Page 29 of 80

BODY OF CALCULATION (cont'd)

As previously calculated there are 3230 gal of unusable F.O. in the storage tank. Therefore the usable F.O. is:

32742.51 gal- 3230 gal = 29512.51 Gal. Usable F.O.

al ~

Run Time = 29

= 4790.99 minutes = 3.33 Days 4

For the 88% TK level case, .89 Spec. G, av. and -1.15% Tol:

Depth Ratio = 106.47" 125., = .8518 DEPTH RATIO VOL. RATIO

.85 .9059

.8518 Y

.86 .9149

.0018 _ X

.01 .0090 X = .0016 Vol. Ratio => Y = .0016 + .9059 Y = .9075 Therefore, F.O. Vol.

at 88% (-1.15% Tol) = .9075 x 35340 = 32071.05 Gal.

and (.89) Spec. Gravity As'previously calculated there are 3230 gal. of unusable F.O. in the storagc ank. Therefore )

the usable F.O. is  ;

I 32071.05 - 3230 = 28841.05 Gal. Usable F.O. j

~8841'05 l Run Tin 6.16 GPM = 4681.99 Min. = 3.25 Day  ;

I l

l l

Calculation 91-019152M3 Rev.0 Page 30 of 80

BODY OF CALCULATION (cont'd)

5. Determination of Run Time Considerine Variations in Specific Gravity. Instrument Inaccuracies.88% and 95% Tank Levels and Fuel Consumotion Rate Based on the 2000 Hr Rating Electrical Load.

A. Input Variables

- Specific Gravity Range .83 to .89 (Ref. 25)

• D.G. 2000 Hr. Rating - 5335 kWe (Ref. 7). The worst case projected loads long term post LOCA are 5310 kWe (Ref. 37). The fuel consumption will be based on the 2000 hr. rating.

- Computer Point Accuracy = il.15% (Ref. 26)

• Fuel Consumption Rate Data based on an assumed fuel density of 7.2 lb/galis tabulated below. (Ref. 24) In order to check the affect of S.G. on fuel consumption, F(gal/hr) will be converted to Mf (Ib /h r)

% Load kWe F gal /hr M fIb/hr

, 110 5485 397.6 2863 (Ref. 24) 100 4986 361.1 2600 75 3740 260.5 1876 50 2493 179.2 1290 25 1247 103.0 742 0 - 29.2 210 F(gal /hr) x 7.2 (lb /gal ) = Mf (Ib/hr) (Ref. 24)

This is plotted on the following page.

B. FuelConsumption From the fuel consumption plot, for an electrical load of 5335 kWe (2000 hr. rating), =, Mf = 2790 lb/hr Water weight at 60*F = 8.3378 lb/gal (Ref. 32)

For Spec. Gravity of .83 => F = 83 x 8 33 = M2 gant

. b/ gal 2790 lb/hr For Spec. gravity of.89 => F = 89 x 8.3378 = 375.98 gal/hr Calculation 91-019-152M3 Rev. 0 Page 31 of 80 7 m * -w- - - r _ __ -- ._ _m_r

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.I

BODY OF CALCULATION (cont'd)

C. Tank Volume

1. 88% Level (For Saec. gravity of.83)

a. 88% indicated levelis 88% of span span is 105" W.C.

. .88 x 105" = 92.4" W.C.

b. Computer Point Accuracy isit.15%

105" x .0115 = 11.21" (use 1.2")

c. Minimum actual "W.C."

min. W.C. = 92.4" - 1.2" = 91.2"

d. Oillevel on gauge for S.G. = .83 91 ""

.83

= 110" oil

e. Oillevelin tank Bubbler tube stans 4" off the tank bottom (Ref. 21) 110" + 4" = Il4" oil

f. Depth Ratio 114" = .9120 Depth Ratio 125

g. Volume Ratio  ;

Denth Rajig Vol. Ratio )

.91 .9554  ;

.9120 X

.92 .9625

.9 1 X = .9554 + _

x (.9625 .9554),

= .9554 + .0014 = .9568

h. Volume

.9568 x 35340 = 33813 gal

i. Usable Volume l Unusable Vol. 3230 gal (As previously calculated)

_ Usable Volume = 33813 gal- 3230 = 30583tal Calculation 91-019152M3 Rev. O Page 33 of 80

4 BODY OF CALCULATION (cont'd)

2. 88% Level (For Spec. Gravity of.89)

a. 88% .ndicated levelis 88% of span span is 105" W.C.

. .88 x 105" = 92.4" W.C.

b. Computer Point Accuracy isil.15%

105" x .0115 = 11.21" (use il.2")

c. Minimum actual "W.C."

min. W.C. = 92.4" - 1.2" = 91.2"

d. Oillevel on gauge for S.G. = .89 91.2"

= 102.47" oil

e. Oillevelin tank Bubbler tube starts 4" off the tank bottom (Ref. 21) 102.47" + 4" = 106.47" oil

f. Depth Ratio 5"

= .8518 Depth Ratio

g. Volume Ratio Denth Ratio Vol. Ratio

.85 .9059

.8518 X

.86 .9149

.8518 .85- -

X = .9059 + , .86 .85 x (.9149 .9059)_

= .9059 + .0016 = .9075

h. Volume

.9075 x 35340 = 32071 gal

i. Usable Volume Unusable Vol. = 3230 gal (As previously calculated)

Usable Volume = 32071 gal- 3230 = 28841 gal Cakulation 91-019152M3 Rev. 0 Page 34 of 80

I BODY OF CALCULATION (cont'd)

3. Tank Volume at 95% level (Specific Gravity of.83)

(Method frora previous secdon)

a. .95 x 105" = 99.75" W.C. indication

b. Computer Point Accuracy = 11.2"

c. Min. actual "W.C."

99.75" - 1.2" = 98.55" W.C.

I

d. Oillevel on gauge 5"

= 118.73" oil 83

e. Oillevelin tank 118.73" + 4" = 122.73" oil

f. Depth Ratio 122.73"

. = 0.9818 125"

g. Volume Ratio Denth Ratio Vol. Ratio

.98 .9952

.9818 X

.99 .9983 X = .9952 + ,' ,

x (.9983 .9952),

I

= .9958 Volume ratio

~

h. Volume l

.9958 x 35340 = 35192 gal 1 l

i. Usable Volume

= 35192 gal-3230 = 31962 gal l

Calculation 91019152M3 Rev.0 Page 35 of 80

BODY OF CALCULATION (cont'd)

4. Tank Volume at 95% level (Specific Gravity of.89)

(Method from previous section)

a. .95 x 105" = 99.75" W.C. indication

b. Computer Point Accuracy = il.2"

c. Min. actual "W.C."

99.75" - 1.2" = 98.55" W.C.

d. Oillevel on gauge 98 55"

= 110.73" cil

e. Oillevelin tank 110.73" + 4" = 114.73" oil

f. Depth Ratio 114.73"

= 0.9178 125

g. Volume Ratio Deoth Ratio Vol. Ratio

.91 .9554

.9178 X

.92 .9625 X = .9554 + _' 2 x (.9625 .9554) _

= .9609 Volume ratio

h. Volume

.9609 x 35340 = 33958 gal

i. Usable Volume

= 33958 Gal. - 3230 = 3728 a21 Calculation 91419-152M3 Rev.O Page 36 of 80

l l

BODY OF CALCULATION (cont'd) l D. Run Times 1.a. 88% Level. S.G. = .83: 2000 hr ratine kWe Usable Volume 30583 gal

= 75.85 Mf at 2000 hr rating of 5335 kWe _ 403.2 gal /hr 75.85 hr = 3.16 days 24 hr/ day 1.b. 88% Level. S.G. = .89: 2000 hr Rating kWe 28841 gal

= 76.71 hrs 375.98 Sal /hr 76.71 hrs

= 3.20 days 24 hr/ day 2.a. 95% Level. S.G. = .83: 2000 hr Rating kWe 31962 gal

- 79.27 403.2 gal /hr 79.27

= 3.30 days 24 hr/ day 2.b. 95% Level. S.G. = .89: 2000 hr Rating kWe 30728 gal

= 81.73 hrs 375.98 gal /hr 81.73 hrs 24 hr/ day .= 3.41 days

6. Determination of Worst Case R.pn Time Considering Temperature Affects on Specific Gravity. In gwment Inaccuracies. 88% and 95% Tank Levsls and Fuel Consumption Rate Base h 2000 Luur Rating Electrical Load A review of the impact of all variables has shown worst case run times occur at low specific gravities.(S.G.) (See the results of Section I.5 of this calculation) The impact oflow S.G. on tank level for a given instrument reading results in high tank volumes. However the fuel consumption rate increases even more at low S.G.'s, resulting in lower run times even witn the higher tank volume.

Calculation 91019-152M3 Rev.O Page 37 of 80

BODY OF CALCULATION (cont'd)

A. Assumptions

1. Fuel S.G. = 0.82. This is the lower Tech Spec. limit of S.G. (Ref. 9) of.83 at 60 F adjusted (Ref. 32 - S.G. vs. Temp. Relationship for Petroleum Oil Curves) to account for possible high temperatures in the vault. (Approx. 90 F chosen based on the EEQ limit. (Reference 8, Section 3.11, APP. 3B)

2. The diesel 2000 hr. rating is 5335 kwe (Ref. 7). The worst case projected loads long term post LOCA are 5310 kWe (Ref. 37). Fuel consumption will be based on the 2000 hr. rating.

3. Tank Volume - Taken at 2 indierted points. a. 88% level which is the present procedure used to verify Tech. Spece (Ref. 22) and b. 95% level which is the present maximum fill point (Ref. 22).

4. Computer Point Accuracy. The accuracy will be 1.15% of the indicated level. [i.e.

1.15% of the span in inches of water (Ref. 26)].

B. FuelConsumption Per section I.5. A of this calculation, the fuel consumption rate at 5335 kW (2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> rating)is Mf = 2790 lb/hr 2790 lb/hr

= 408.1 gal /hr (at .82 S. G.)

F = 82 x 8.3378lb/gal C. Tank Volume

1. Tank Volume at 88% Level

a. 88% indicated levelis 88% of span span is 105" W.C.

.88 x 105" = 92.4" W.C.

b. Computer Point Accuracy is 1.15 %

!Oi~x.0115 = 1.21" (use it.2")

c. Minitcum etual "W.C."

m n W.C. = 92.4" - 1.2" = 91.2"

d. Oillevel on gauge for S.G. e .82 91 ""

= 111.22" oil

.82

e. Oillevelin tank Bubbler tube stans 4" off the tank bottom (Ref. 21) 111.22" + 4" = 115.22" oil

f. Depth Ratio 115.22"

= .9218 Depth Ratio 125 Calculadon 91-019152M3 Rev. O Page 38 of 80

BODY OF CALCULATION (cont'd)

g. Volume Ratio Deoth Ratio Vol. Ratio

.92 .9625

.9218 X

.93 .9692 X = .5 625 +

8_ ]9 2 x (.9692 .9625)

= .9625 + .0012 = .9637

h. Volume

.9637 x 35340 = 34,057 gal

i. Usable Volume Unusable Vol.-3230 gal (As previously calculated)

JJ_ sable Volume = 34057 gal- 3230 = 30827 nat.

2. Tank Volume at 95% level (Method from previous section)

a. .95 x 105" = 99.75" W.C. indication

b. Computer Point Accuracy isil.15%

105" x .0115 = il.21" (use il.2")

c. Min. actual "W.C."

99.75" - 1.2" = 98.55" W.C.

d. Oillevel on gauge 98.55" W.C.

= 120.18" oil

.82

e. Oil levelin tank 120.18" + 4" = 124.18" oil

f. Depth Ratio 25, " = 0.9934 Calculation 91-019-152M3 Rev. 0 Page 39 of 80

BODY OF CALCULATION (cont'd)

g. Volume Ratio Deoth Ratio Vol. Ratio

.99 .9983

.9934 X 1.0 1.0

~

, [9 x (1.0 .9983)

X = .9983 + 3 ,

= .9989 Volume Ratio

h. Volume

.9989 x 35340 gal = 35,301 gal.

i. Usable Volume

= 35301 gal- 3230 = 32071 gal.

D. Run Times '

1. 88% Level, S.G. = .82; 2000 hr rating kWe Usable Volume 30827 gal Mf at 2000 hr rating of 5335 kWe " 408.1 gal /hr 75.54 hr

= 3.15 days 24 hr/ day

2. 95% level, S.G. = .82; 2000 hr rating kWe 32071 gal 408.1 Sal /hr 78.59 24 hr/ day

7. Determination of Technical Soecincation Compliance Considerine Temuerature Affects on Specinc Gravity. Instrument Inaccuracies and 88% Tank Level For verification of Tech. Spec. compliance using the existing procedure verification point of 88%, the lowest actual F.O. levels occur at the high specific gravities.

A. Assumptions

1. Fuel specific gravity = 0.90. The maximum allowable S.G. is 0.89 at 60'F (Ref. 9).

The value of 0.90 (Ref. 32 - S.G. vs. Temp Relationship for Petroleum Oils Curves) ,

l adjusts for temperature variations as low as 24 F (Ref. 25, OPS-Form 3646B.7-1).

Calculation 91-019152M3 Rev.0 .

Page 40 of 80

l 1

BODY OF CALCULATION (cont'd)

2. ComputerPoint Accuracyis 1.15% (Ref. 26).

B. Volume for S.G. = .90 (Method from previous secdon)

1. From secdon I.5.C.1.C Minimum "W.C." = 91.2" i

2. Oillevel on gauge for S.G. = .90

= 101.33" Oil 9

3. OillevelinTank 101.33" + 4" = 105.33" Oil

4. Height Rado

' 105.33" 125

= .8426

5. Volume Rado

! Ogr>th Ratio Vol. Ratio

. .84 .8967

.8426 X

.85 .9059

~8 X = .8967 + f .426 85 .84.84 x (.9059 .8967) .

= .8967 + .0024 = .8991 1'

6. Volume

.8991 x 35340 gal = 31,774

7. Tech Spec. Minimum 32760 32760-31774 = 986 gallons shon 1

Calculation 91-019-152M3 Rev.0 Page 41 of 80 7

BODY OF CALCULATION (cont'd)

8. Determination of Technical Specification Compliance Considering Temperature Affects on Actual Recorded Specific Gravity. Instrument Inaccuracies and 88% Tank Level A. Assumptions

1. Fuel specific gravity = .88. The maximum specific gravity on fuel deliveries from 6/23/92 to 1/11/91 was .8665 (Ref. 38). Adjusted for temperature as low as 24 F (Ref. 25, OPS-Form 3646B.7-1), S.G. = .88 (Ref. 32)

2. Computer Point Accuracy is 1.15% (Ref. 26)

B. Volume for S.G. = .88 (Method from previous secdon)

1. Frorn section I.5.C.I.C Minimum "W.C." = 91.2"

2. Oillevel on gauge for S.G. = .88 91 ~'~"

= 103.64" Oil

.88

3. OillevelinTank 103.64" + 4" = 107.64" Oil ,

4. Depth Ratio 107.64" 125., = .8611

5. Volume Ratio Denth Ratio Vol. Ratio

.86 .9149

.8611 X

.87 .9236

• 6 X = .9149 + ,

, x (.9236 .9149)

= .9149 + .0010 = .9159

6. Volume

.9159 x 35340 gal = 32,368 Calculation 91019152M3 Rev.O Page 42 of 80

..M , t_s .-.i 4 M. - ls a =.4.1hm.mju.- 4.:a.- *-L4.-A- - -*4-.3-44-a -- -,-- -,+&r,.s: JK e.- 4- 4--- r  % J._ u e4 m - A - F BODY OF CALCULATION (cont'd)

7. Tech Spec. Minimum - 32760 32760 - 32368 = _392 gallons short

8. Total System Volume The day tank is automatically filled at 29.72" (361 gallons total volume). This is at an S.G. of.89. With a 3" accuracy the setpoint could be 26.72" (318 gallons) (See Section II.4 of this calculation).

This leaves a total system volume of 32368 + 318 gal. = 32686 gal,i.e.,74 gallons short. It is likely that the day tank level will remain between this low level and the full tank level of 35.53" ~ 440 gallons (pump off at 40" adjusted for an S.G. of.89 and an instrument inaccuracy ofi3") for a total system volume of 32368 + 440 =

2 32808 Gal. It also does not account for any fuel oil which might be in the system.

Therefore, considering the combination of events which must occur (i.e., highest delivered specific gravity, lowest estimated temperatures, storage tank level at 88%

and day tank level at the low end of its operadng range), there is reasonable assurance that the Tech. Spec. volume of 32760 gallons is satisfied.

u

't i

l i

j 1

Calculation 91-019152M3 Rev.0

Page 43 of 80 i

- _ - .,- - . . . .. ..-.. ._ ,. ._,-._. . _ m, , . . , . - _-. -.. - ,. .-- , , -

BODY OF CALCULATION (cont'd)

II. Fuel Oil Day Tanks 3EGF*TK2 A or 3EGF*TK2B This calculation will establish the Usable Fuel oil available and length of operation for the i Emergency Diesel Generators Fuel Oil Day Tanks for the following cases. (The amount of l unusable fuel oil in the day tank due to the 2" penetration of the suction line into the tank l (Ref. 20) and the depth of vortex formation shall also be calculated and be accounted for m I each of these cases.) 1 l

A. Calculate the depth of vortex formation of the fuel oil as it exits from the fuel oil day l tank. Determine the amount of unusable fuel oilin the day tank due to the 2" penetration I of the discharge line into the tank aad the depth of vortex formation.

B. SP-3EGF-5, Rev.1: 3EGF-LS 28 A&B Level Switch on the Day Tanks 3EGF*TK2A&2B, respectively, signals to a Low-Low Level Alarm on the EG Panel and Main Board-8 Panel when the level in the Day Tanks decreases to 18" above the tank bottom. (Ref. I1)

C. SP-3EGF-6, Rev. 3: 3EGF-LS 29A&B Level Switch that signals a Low Level Alarm of 23" above tank bottom,3EGF*TK2A & 2B respectively, on the EC Panel. The Lead Fuel Oil Transfer Pump starts automatically at its Low Normal Ser Point of 30.5". If the Fuel Oil Transfer Pump fails to start at this set point, the Low Level Alarm will alen the Operator to start the Fuel Oil Transfer Pump and restore fuel oil now to the Day Tank, (Ref.12)

D. SP-3EGF-11, Rev. 0: Level Indicating Switch 3EGF*LS40A&B trips the " Lead" Fuel Oil Transfer Pumps 3EGF*PI A&PIB on a High Oil Level in the Day Tanks, 3EGF*TK2A&2B and starts the Fuel Oil Transfer Pumps,3EGF*PI A&PIB on Low Fuel Oil Levelin the Day Tanks. (Ref.13) The F.O. specific gravity range of.83 .89 shall also be considered.

E. SP-3EGF-12 Rev. 0: Level Indicating Switch 3EGF*LS 41 A&B Trips the " Follow" Fuel Oil Transfer Pumps 3EGF*PIC & PID on a High Level in the Day Tanks, 3EGF*TK2A&B, and stans the Fuel Oil Transfer Pumps,3EGF*PIC&PID, on Low Fuel Oil Level in the Fuel Oil Day Tanks. (Ref.14) The F.O. specific gravity range'of

.83 .89 shall also be considered.

F. With the Day Tanks filled to the Technical Specification (Ref. 9) Minimum Fuel Oil volume of 205 gallons.

G. With the Day Tanks filled to the Normal Low Setpoint in the Day Tank in order to satisfy the ANSI N195-1976 (Ref. 23) requirement to " Maintain at least 60 minutes of operation at the level where oil is automatically added to the Day Tank ... plus a minimum margin of 10%".

H. With the Day Tanks filled to 490 gallons per the Operating Procedure (Ref. 22).

Calculation 91-019152M3 Rev. 0 Page 44 of 80

BODY OF CALCULATION (cont'd)

1. Determine the Capacity (callons) of the Emergency Diesel Generator Fuel Oil Day Tank and Identification of the Usable and Unusable Volumes Considerine Vortex Generatiam Cylindrical Portion Tank Length = 4'- 11" + (2 x 1 1/2") = 62" Ref.17 Tank ID = 48" (OD) - (2 x 3/16") = 47.625" Ref.17 Volume = .7854 x D2 x L Ref.19 Volume = .7854 x (47.625"/12"/FT)2 x 62"/12"/FT Volume = 63.9159 FT3 Capacity = 63.9159 FT3 x 7.48 Gal /FT3 = 478 Gallons Dished Heads Portion Volume = .0809 (D)3 x 2 Heads (Ref.19 Pg. 6 - 108)

Volume = .0809 (47.625"/12"/FT)3 x 2 Heads Volume = 10.114 FT3 Capacity = 10.114 FT3 x 7.48 Gal/FT3= 76 Gallons Fuel Oil Day Tank Capacity

= Item 1 + Item 2

= 478 Gal + 76 Gal

= 554 Gallons A Fuel Oil Day Tank Capacity of 550 Gal. capacity has been used extensively in documents such as Set Point Cales., Station procedures, etc. Since 554 Gal. is approximately 550 Gal, a 550 Gallon capacity Fuel Oil Day Tank will be used to determine the amount of Usable Fuel Oil in the Day Tanks, and the length of Diesel Operation.

Ref. 20 modified the fuel oil discharge lines, from the Day Tank, so that they extended 2 inches into the tank. This was to comply with ANSI N195 - 1976/ANS-59.5. This -

requirement states: " Suction from the Day or Integral Tanks shall be from above the Tank Bottom.". Per Ref. 20 this extension of the Suction line into the Day Tank will decrease the usable volume of Fuel Oil by 7-8 gallons.

Check -4 2"/47.625" = .0420 Depth Ratio Volume Ratio = .0145 Capacity = .0145 x 550 Gal. = 8 Gals - Unusable Volume of F.O.

i Calculationn1019152M3 Rev.O Page 45 of 80

4 BODY OF CALCULATION (cont'd)

Two fuel oil discharge lines exit the bottom of the F.O. Day Tank. The lines are spaced six l inches (Ref.17) apart on the bottom of the tank. One line supplies oil to the engine driven i fuel pump and one line supplies oil to the DC motor driven fuel oil pump (Ref. 2). During  !

normal operation of the Diesel Generator only the engine driven fuel pump operates. The l D.C. motor driven fuel oil pump is used during initial startup or in the event of low pressure in the fuel oil discharge mamfold. With one or both pumps in operation, oil is drawn out of the Day Tank and a vortex is formed on the oil surface. The presence of the vortex with the oil level at low levels in the tank may cause air to enter the suction line of the pump prior to emptying the Day Tank and may affect diesel engine operation. The critical submergence depth over the tank outlet line for Air Core Vortex Formation will be determined. This critical vortex depth will then be considered as unusable fuel oil volume, since within this

, submergence level air may be entrained into the fuel oil.

A. Tank Operating Conditions Fluid - #2 Diesel Fuel Oil (Ref. 7) ,

Inlet Size - 1" Sch. 80 C.S. Pipe (Ref. 20) l Specific Gravity of Fuel 0.83 to 0.89 (Ref.25) i Temperature Range in Tank: 24 to 90*F (Ref. 8, Section 3-11 and Ref. 25, Form 3646B.7-1) l Case 1 - Engine Fuel Consumption Rate - 6.16 GPM (Ref. 7 - Attachment 2)(Assumpt.

3)

Case 2 Fuel Pump Capacity - 12 GPM (Ref. 7 - Attachment 2) (Assumpt. 3)

Inlet Velocities Inlet - ID (d) = 0.957 in. (Ref. 32) i

= 0.0798 ft.

Inlet Velocity (V) = Q/A Case 1 - (Q = 6.16 GPM) t 6.16 GPM )

448.8 GPM/CFS l V=  !

4 K(0.0798)2  ;

4 V = 2.74 fps.

4 Calculation 91-019-152M3 Rev.0 Page 46of 80

-- -- a e e ,-,,..v,

BODY OF CALCULATION (cont'd)

Case 2 (Q = 12.0 GPM)

J 12.0 GPM 448.8 GPM/CFS V=

x(0.0798)2 4

V = 5.35 fps B. Method 1 - Critical Depth for Vortexing Using Ref. 28

1. Definition Sketch

>r J

v

\/

v Z H

\ 4.--- d 4 [

Q Y

2. Related Hydraulic Parameters V

F = Froude No. = @ (Ref. 28 - p. 613)

Case 1 r F= 2.74 fos l V32.2(0.0798) = 11 Case 2 F= ._ 135 V32.2'.0.0798) = 3.3 R = Reynolds No. = S (Ref. 28 Pg. 613) vd Calculation 91-019152M3 Rev.0 Page 47 of 80

BODY OF CALCULATION (cont'd)

Q = Flow Rate, ft 3/Sec v = Kinematic viscosity (ft. 2/3,c) d = inside diameter, ft.

l l Ref. 25 Section 2.2.2 states: " A kinematic viscosity at 40 C of greater than or equal to l.9 centistokes but less than or equal to 4.1 centistokes (alternative, saybolt viscosity,

{ SUS at 100 F of greater than or equal to 32.6, but not less than or equal to 40.1),if gravity was not determined with the suppliers certification."

40*C => F = 9/5 C + 32 (Ref. 34 Pg. 8 - 12)

F = 9/5 (40 C) + 32

'F = 104 Then: fore the range for kinematic viscosity - centistokes (v) -is 1.9 to 4.1 at 104 as established for acceptance by Ref. 25.

In order to determine kinematic viscosities at other diesel fuel oil temperatures, a l graph showing a band of kinematic viscosities at different temperatures will be developed.

Page 4 30 of Ref. 34 (Viscosity of Fuel Oils Graph), indicates a band of kinematic viscosity vs. temperature for #2 fuel oil. By plotting the above kinematic viscosities of 1.9 and 4.1 at 104 , and taking the same slope of the band of kinematic viscosity vs. temperature for the #2 fuel oil, a graph showing a band of kinematic viscosity vs.

temperature for #2D diesel fuel oil has been developed, dashed lines (Attachment 3).

Note: This band of kinematic viscosity vs. temperature is based on the acceptance criteria for the diesel fuel oil as stated in Ref. 25.

From Attachment 3 the kinematic viscosity of No. 2D fuel oil ranges from 2.3 centistokes to 17 centistokes I centistoke = 1 MM 2/ Sec I 1 centistoke = 1.076 x 10-5 ft2 /3 ,c Viscosity range 2.3 (1.076 x 10-5) = 2.47 x 10-5 ft2/3,c 17 (1.076 x 10-5) = 1.83 x 104 ft 2/3,c I

l I

l t l l

l Calculation 91-019-152M3 Rev.O Page 48 of 80 I

--j

4 BODY OF CALCULATION (cont'd)

Range of R Case -1 Q = 6.16 gpm i

6.16 GPM R = 448.8 GPM/CFS = 940 (1.83 x 104)(0.0798) 6.16 GPM R = 448.8 GPM/CFS = 6965 (2.47 x 10-5)(0.0798) 1 Case - 2 Q = 12.0 gpm i 12.0 GPM

= 1831 R = 448.8 GPM/CFS (1.83 x 104)(0.0798) 12.0 GPM

= 13565 R = 448.8 GPM/CFS (2.47 x 10-5)(0.0798) f NT = Circulation No. = T d/Q q T = Circulation l i

WhereT is defined as:

T Ref. 28 Eq. 5 u - 2nr f(r) u = Tangential component of velocity in tank.

NT must be assumed in this calculation.

During the experimental conditions of Ref. 28 NT 3/2 - 0.1 3

NT /2 = 0.1 is assumed in this cale.

3. Critical Depth Equation Rl /2 (H/d)l/2(- 1.0)

(H/d )2 = I (Ref. 28 - Eq. 28)

W(1+xT/y)l/2 0.00337 F2 RNT2 1 + xT/y Calculation 91019152M3 Rev.O Page 49 of 80

. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ J

1 BODY OF CALCULATION (cont'd)

Where W = Weber No.

From Ref. 28 the first term above can be neglected if:

l Fu-1 From (1.7)la = 1.3 to (3.3)la = 1.8 I From (940)l/4 = 5.5 to (13,565)l /4 = 10.8 R /4 - 10 NT 3G - 0.1 (assumed)

The first term above is neglected in this calculation. Therefore:

(H/d )2 = E N N 1 + xT/v x - 6 x 10-5 Ref. 28 pg. 614 NTQ T= d NT32 = 0.1 Assumed NT = 0.22 At any given flow rate, the critical depth of submergence H is inversely proportional ,

to the viscosity. For #2 diesel fuel oil at a temperature range of 24 F to 90 , the lowest viscosity 2.3, centistokes occurs at 90 F.

4. Critical Depth For Case-1 (Q = 6.16 GPM) at 90 F 6.16 0.22 (448.8}

T= = 0.038 0.0798 For R = 6965 0.00337 (1.7)2 (6965)(0.22)2 (H/d)2 =

, (6 x 10-5)(0.038) 2.47 x 10-5 (H/d)2 = 3.01 H/d = 1.7 (with d - 1 inch)

Case - 1 Critical Deoth Less Than 2 Inches Calculation 91019152M3 Rev.O Page 50 of 80 1

BODY OF CALCULATION (cont'd)

5. Critical De.cth For Case - 2 (Q = 12 GPM) at 90'F 0.22 (44g,gj12.0 1 T= = 0.07 0.0798 For R = 13,565

0.00337 (3.3)2 (13,565)(0.22)2

4. (H/d9 =

(6 x 10-5)(0,07) 3 2.47 x 10-5 (H/d)2 = 20.6 H/d = 4.5 with d - 1 inch Case - 2 Critical Death Less Than 41/2 Inches

, C. Method 2 - Critical Depth for Vortexing Using Ref. 29.

Ref. 29 gives the relationship for critical depth for vortexing on Fig. 2 - (Attachment 4.)

Case 1 (Q = 6.16 GPM)

F = 1.7 1

8/d- 1.7 s = 1.7 (l") - 2_iIn Case 2 (Q = 12 GPM)

F = 3.3 8/d- 3.3 s - 3.3 (l") - 31/2.11L Calculation 91419152M3 Rev.0 Page 51 of 80 2

,e -, -- - , ,

BODY OF CALCULATION (cont'd)

D. Method 3 - Critical Depth for Vortexing Using Ref. 30.

Ref. 30 gives the relationship for critical depth for vortexing on Fig (Attachment 5) '

Case 1 V(d)la = 2.74 fps (0.0798)l/2 = 0.77 From Attachment 5 S - 0.77 (0.35) ft = .27 ft. = 3.2 inehes sav 3 inches Case 2 V(d)la = 5.35 fps (0.0798)3 U = 1.5 From Attachment 5 S = 1.5 (0.35) ft = 0.5 ft. = 6 inches sav 6 inches Summary Of Vortex Calculation Results The Method 3 (Reference 30) vortex calculation results are at the very lowest end of the graph and are likely over conservative. The results from Methods 1 and 2 (Reference 28 and 29) are consistent. Method 1 (Ref. 28) results will be used since the Ref. 28 model is similar to the actual day tank configuration.

Case 1 - Vortex Depth (s) = 2" Case 2 - Vortex Depth (s) = 41 U "

Since the actual discharge rate from the day tank has not been confirmed by Colt, the usable fuel oil volumes and corresponding diesel generator run times will be calculated for bott. the Case 1 and Case 2 vortex depths.

For the condition where we consider a 2" depth for vortex formation, in addition to the 2" penetration of the discharge line into the Day Tank, the total depth of Unusable Fuel in the Day Tank is 4". The corresponding unusable volume of Fuel Oil is determined as follows:

4" 47.625. = .0840 = Dep6 Ratio Volume Ratio Deoth Ratio Vol. Ratio

.08 .0375

.0840 Y

.09 .0446

.0040 _

X

.01 . 0071 Calculation 91-019152M3 Rev.0 Page 52 of 80

,- -- w ---w, n- r- --,m- - - .

BODY OF CALCULATION (cont'd) 4 X = .0028

. Y = .0375 + .0028 = .0403 Volume Ratio Amount of Unusable Fuel = .0403 x 550 Gal (4" Depth) = 22.17 Gal.

For the condition where we consider a 4I /2" depth for vortex formation, in addition to the 2" penetration of the discharge line into the Day Tank, the total depth of Unusable Fuel in the Day Tank is 61/2 ". The corresponding unusable volume of Fuel Oil is determined as follows:

6.5" 47.625

= .1365= Depth Ratio Volume Ratio Deoth Ratio Vol. Ratio

.13 .0764

.1365 Y

.14 .0851

.0065 _

X

.010 .0087 X = .0057 Y = .0057 + .0764 = .0821 Volume Ratio

. Amount of  :

Unusable Fuel = .0821 x 550 Gal. -

(61/2" Depth) = 45.13 Gal.

2. The length of Diesel Generator Run Time based on the 18" Fuel Oil Setpoint of 3EGF LS28 A&B (Ref.11)is calculated as follows:

A. Fmm Ref. I determine the Depth Ratio for 18" of fuel oil height.

Depth Ratio = 18" =.3780 ,

47.625" c= (Day Tank I.D.)

B. At a Depth Ratio = .3780, determine the Volume Ratio - VR Per Ref.1: VR = .3462 l

Calculation 91-019152M3 Rev 0 Page 53 of 80 l

\

BODY OF CALCULATION (cont'd)

C. Determine the Fuel Oil Capacity in the Day Tank based on a VR = .3462 Capacity = (VR) x (Day Tank Capacity)

Total Ca acitY = .3462 x 550 Gal = 190 Gallons wsaumt umsaun cusauemwsuun

1. For a 2" Vortex Depth Total Fuel Oil

= 190 Gal.

Volume at 18" Unusable F.O.

Volume Based = 22 Gal. .

On 2" Vortex Depth Usable F.O. = 190 Gal. - 22 Gal.

= 168 Gal.

Run Time at 18" Setpoint of = 6 6 GP$1 = 27.2 Minum 3EGF-LS28A&B (2" Vortex Depth)

2. Similarly For a 4 1/ 2" Vortex Depth Unusable F.O.

= 45.13 Gal.

Volume Usable F.O. = 190 Gal. - 45.13 Usable F.O. = 144.87 Gal.

Run Time at 18" Setpoint of = I I' 6 I = 23.51 Minutes I

3EGF-LS28A&B (4 /2" Venex Depth)

Calevhtion 91419152M3 Rev.O Page 54 of 80 i

1 BODY OF CALCULATION (cont'd)

3. The length of Diesel Generator Run Time based on the 23" Fuel Oil Setpoint of 3EGF.LS29 A&B (Ref.12)is calculated as follows:

Depth Ratic = 47 6 5 = .4829 At Depth Ratio of .4829, the Volume Ratio per Reference 1 is:

Dcoth Ratio Vol. Ratio 48 .4745 4829 Y

.49 .4872

.0029 _

X

.01 .0127 X = .0037 '

Y = .0037 + .4745 = .4782 Volume Ratio The Total Volume of (Usable and Unusable) F.O. at the 23" Setpoint Equals:

F.0, Volume At 23" = 550 gal. x .4782 = 263 Gallons The length of Diesel Generator mn time based on the 23" Fuel Oil Setpoint of 3EGF-LS29 A&B is calculated as follows:

A. For a 2" Vortex Depth Total Volume = 263 Gal.

Unusable F.O.

Volume Based On = 22 Gal 2" Vortex Depth Usable F.O. = 263-22 Usable F.O. = 241 Gal.

Run Time at 23" Setpoint of

=6 G Q = 39.1 Minutes 3EGF-LS29A&B (2" Vortex Depth)

Calculation 91-019-132M3 Rev. 0 Page 55 of 80

BODY OF CALCULATION (cont'd)

B. Similarly, for a 4 1/2" Vortex Depth Unusable F.O. = 45.13 Gal.

Volume Usable F.O. = 263-45.13 Usable F.O. = 217.87 Gal.

217.87 Gal Run Time at 23" Setpoint of = 6.16 GPM = 35.37 Minutes 3EGF-LS29A&B (4 1/2" Vortex Depth)

4. The Length of Diesel Generator Run Time Based On The Lead Pump High and Low Actuation Set Points (including instrument accuracy) 3EGF*LS40AIB - Ref.13.

The accuracy of these instruments is i 3.0" (Ref.13).

The Normal - High Set Point Level is 40" 3" The Normal- Low Set Point Levelis 30.5" 3" A. At the High-High Actuation Point (4"f ')

Depth Ratio = 47 6 5., = .9029 Volume Ratio Per Ref.1 is:

Deoth Ratio Volume Ratio

- .90 .9480

.9029 Y

.91 .9554

.0029 _ X

.01 - .0074 X = .0021 Y = .0021 + .9480 = .9501 Volume Ratio The Total Volume of (Usable and Unusable) F.O. at the 43" actuation point equals:

F.O. Vol, at 43" = 550 Gal x .9501 = 522 Ga!

Calculation 91-019-152M3 Rev.0 Page 56 of 80

F BODY OF CALCULATION (cont'd)

The length of DG run time based on 43" actuation point is calculated as follows:

1. For a 2" Vortex Depth Total Vol. = 522 Gal Unusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth Usable F.O. = 522-22 Usable F.O. = 500 Gal.

Run Time at 43" Actuation Point of = 6.16 PM = 81.1 Minutes 3EGF*LS40A/B (2" Vortex Depth)

2. Similarly for a 4 I/2" Vortex Depth Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 522-45.13 = 476.87 Gal.

476.87 Run Time at 43" Actuadan Point of = 6.16 GPM = 77.41 Minutes 1

3EGF*LS40A/B (4 / "2 Vortex Depth)_ ,

B. At 40" Set Point (Normal- Hich Set Point}

40" Depth Ratio = 47.625" = .8399 Volume Ratio Per Ref.1 is Death Ratio Volume Ratio

.83 .8873

.8399 Y

.84 .8967 l

.0099 _ X

.01 ~ .0094

. X = .0093 Y = .0093 + .8873 = .8896 Vol. Ratio -i

1 The Total Volume of (Usable and Unusable) F.O. at ,

the 40" Set Point is  !

550 Gal. x .8966 = 493 Gallons  !

Calculation 91-019-152M3 Rev.O Page 57 of 80 k

-. -- - _ -?

BODY OF CALCULATION (cont'd) .

The length of D.G. run time based on 40" Set Point is calculated as follows:

1. For a 2" Vortex Depth Total Vol. = 493 Gal Unusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth Usable F.O. = 493-22 = 471 Gal.~

Run Time at 40" Set Point of

= 6.16 = 76.4 Minutes 3EGF*LS40A/B (2" Vortex Depth) 1

2. Similarly for a 4 /2" Vortex Depth Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 493 - 45.13 = 447.87 Gal.

Run Time at 40" Set Point of = gf = 72.71 Minutes 1

3EGF*LS40A/B (4 /2" Vortex Depth)

C. At 37" Actuation Point (Low-High Actuation Point) 37"

, Depth Ratio = 47.625" " '7709 Volume Ratio Per Ref.1 is Deoth Ratio Volume

.77 .8263

.7769 Y

.78 .8369

.0069 X

.01 .0106 l X = .0073  !

Y = .8263 + .0073 = .8336 Vol. Ratio

)

-l l

Calculation 91-019-152M3 Rev.O

Page 58 of 80

. j

i BODY OF CALCULATION (cont'd)

The Total Volume of(Usable and Unusable) ,

F.O. at the 37" actuation point equals 550 Gal x .8336 = 458 Gal. l The length of DG mn time based on 37" actuation point is calculated as follows:

1. For a 2" Vortex Depth Total Vol. = 458 Gal Unusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth Usable F.O. = 458-22 = 436 Gal.

436 Run Time at 37" Actuation Point of

= 6.16 = 70.7 Minutes 3EGF*LS40A/B (2" Vortex Depth)

2. Similarly for a 4 1/ 2" Vortex Depth Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 458-45.13 = 412.87 Gal.

Run Time at 37" Actuation Point of = = 67.02 Minutes i

3EGF*LS40A/B (41/ 2" Vortex Depth)

D. At 33.5"(30.5 + 3) Actuation Point (High-Low Actuation Point) 33.5" Depth Ratio = 47.625" = .7034 Volume Ratio Per Ref.1 is Denth Ratio Volume

.70 .7477

.7034 Y i

.71 .7593 I Calculation 91-019-152M3 Rev.O Page 59 of 80 l

il l

l l

BODY OF CALCULATION (cont'd)

.0034 X

.01 .0116 X = .0039 Y = .0039 +97477 = .7516 Vol. Ratio The Total Volume of (Usable and Unusable)

F.O. at the 33.5" actuation point equals 550 Gal. x .7516 = 413 Gal.

The length of DG run time based on 33.5" actuation point is calculated as follows:

1. For a 2" Vortex Depth Total Vol. = 413 Gal Unusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth Usable F.O. = 413-22 = 391 Gal.

391 Run Time at 33.5" Actuation Point of = 6.16 = 63.4 Minutes 3EGF*LS40A/B (2" Vortex Depth) 1

2. Similarly for a 4 /2" Vortex Depth Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 413 - 45.13 = 367.87 Gal.

367.87 Run Time at 33.5" Actuation Point of =

6.16

= 59.721 ,utes 3EGF*LS40A/B (4 I/2" Vertex Depth)

E. At 30.5" Set Point (Normal-Low Set Point) 30.5" Depth Ratio = 47.625" = .64M Volume Ratio Per Ref.1 is Calculation 91-019-152M3 Rev.O Page 60of 80 l

i i

BODY OF CALCULATION (cont'd) j Depth Ratio Volume l

.64 .6759

.6404 Y

.65 .6881 X l

.0004

.01 _- .0122  ;

X = .0005 Y = .0005 + .6759 = .6764 Vol. Ratio I

The Total Volume of(Usabic and Unusable)

F.O. at the 30.5" Set Point equals 550 Gal X .6764 = 372 Gal.

The length of DG run time based on 30.5" set point is calculated as follows:

1. For a 2" Vortex Depth T,otal Vol. = 372 Gal Unusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth Usable F.O. = 372-22 = 350 Gal.

Run Time at 30.5" Actuation Point of. = 350 Gal. = 56.8 Minutes 3EGF*LS40A/B (2" Vortex Depth)

I Vortex Depth

2. Similarly for a 4 /2" Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume. = 372-45.13 = 326.87 Gal.

Run Time at 30.5" Actuation Point of =

if = 53.06 Minutes I

3EGF*LS40A/B (4 /2" Vortex Depth)

Calculation 91419152M3 Rev.O Page 61 of 80 1

._ .,-. -, ___ k

l 1

)

l BODY OF CALCULATION (cont'd) l F. At 27.5" Actuation Point (Low-Normal Actuation Point) j

,, = .5774 Depth Ratio = 4 .6 Volume Ratio Per Ref.1 is Dcoth Ratio Volume

.57 .5889

.5774 Y

.58 .6014

.0074 _ X

.01 - .0125

. X = .0093

'Y = .0093 + .5889 = .5982 Vol. Ri The Total Volum of (Usable and Unusable)

F.O. at the 27.'s" Actuation Point equals 550 Gal X .5982 = 329 Gal.

The length of DG run time based on 27.5" actuation poin'.is calculated as follows:

1. For a 2" Vortex Depth Total Vol. = 329 Gal Urusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth -

l Usable F.O. = 329-22 = 307 Gal.

Run Time at 27.5" Actuation Point of

= 6.16 = 49.8 Minutes

. 3EGF*LS40A/B (2" Vortex Depth) 1

2. Similarly for a 4 /2" Vortex Depth Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 329-45.13 = 283.87 Gal.

Calculation 9l-019152M3 Rev. O Page 62 of 80

BODY OF CALCULATION (cont'd)-

Run Time at 27.5" Actuation Point of6.16 = 46.08 Minutes

= 283.87 3EGF*LS40A/B (4 I/2" Vortex Depth)

The following calculation is performed to determine the variation in the process setpoints (40" high - normal and 30.5" low-normal) of the lead pump due to a variation in the specific gravity of the fuel used. From SP-3EGF-ll, the process setpoint of 40" is equivalent to an instrument setpoint of 16.5 inches of water. This mstrument setpoint is based on an average specific gravity of.825" Currently, the specific gravity range is .83 .89. Assuming .825= .83, the instrument setpoint of 16.5" of water is considered valid for .83 S.G. For the case of the higher specific gravity of .89, the normal high process setpoint is detennined to be the following:

~

16 5" G. Current instrument setpoint = .825 = 20" is equivalent to a 40" process setpoint For spec. gravity => 16 5",g9 = 18.53" is equivalent to a 38.53" normal high of.89 process setpoint The resulting volume of F.O. that corresponds to this normal-high process setpoint of 38.53" is determined as follows:

38.53" Depth Ratio = 47.625" = .8090 Denth Ratio Vol. Ratio

.800 .8576

.8090 Y

.81 .8677

.0090_ X

.01 .0101 X= .0091 Y= .8576 + .0091 Y= .8667 = Vol. Ratio Calculation 91-019-152M3 Rev.O Page 63 of 80

1 BODY OF CALCULATION (cont'd)

Therefore the day tank vol. at the normal high setpoint and = 550 x .8667 = 476.68 GAL.

.89 S.G.,

1. AT THE 2" VORTEX CASE

' Unusable F.O. = 22 GAL.

Usable F.O. = 476.68 - 22 = 454.68 GAL Run ting; 2" Vorteg & .89 S.G. _ 454.68 6.16 = 73.81 MIN

=

2. AT THE 41/2"_VOR'I EX CM Unusable F.O. = 45.13 GAL.

Usable F.O. = 476.68 - 45.13 = 431.55 GAL R u' ti m e 41/2" Vortex & .89 S.G. _ 431.55 6.16 = 70.06 MIN Utilizing the same i3" inaccuracy as specified in Calc. SP-3EGF-11, the high actuation point would be (38.53 + 3") 41.53" and the low actuation setpoint would be (38.53"m- 3") 35.53".

The resulting volume of F.O. that corresponds to these process actuation points is determined below:

H. FOR THE LOW-HIGH ACTUATION SETPOINT WITH .89 S.G. F.O. (35.53")

Depth Ratio = 47 625,, = .7460 Deoth Ratio Vol. Ratio

.74 .7934

.7460 Y

.75 .8045

.0060 _ -

X

.01 .0111 X = .0067 Y = .0067 + .7934 =.8001 Vol. Ratio Calculation 91-019152M3 Rev.O Page 64 of 80

BODY OF CALCULATION (cont'd)

Total day tank vol. at the low-high actuation point and .89 S.G. = 550 x .8001 = 440.03 GAL.

1. AT THE 2" VORTEX CASE i Unusable F.O. = 22 GAL.

4 Usable F.O. = 440.03 - 22 = 418.03 GAL a-Run time 2" Vortex & .89 S.G.

, 418.036.16 = 67.86 MIN

2. AT THE 41/2" VORTEX CASE Unusable F.O. = 45.13 GAL.

Usable F.O. = 440.03 - 45.13 = 394.90 GAL Run time 41/2" Vortex & .89 S.G. _ 394.90 6.16 = 64.11 MIN I. FOR THE HIGH HIGH ACTUATION POINT WITH .89 S.G. F.O. (41.53")

5~

Depth ratio = 47.b25, = .8720 Deoth Ratio Vol. Ratio

.870 .9236 4

.8720 Y

.880 .9320

.0020 _- X

.01 .0084 X = .0017 Y- = .9236+ .0017 = 9253 Vol. Ratio i

Calculation 91419152M3 Rev.O

Page 65 of 80

1 1

BODY OF CALCULATION (cont'd)

Total day tank vol. at the high-high actuation point and = 550 x .9253 = 508.90 GAL.

.89 S.G.

1. AT THE 2" VORTEX CASE Unusable F.O. = 22 GAL.

Usable F.O. = 508.90 - 22 = 486.90 GAL Run time 2" Vortex & .89 S.G. , 486.90 79 M MIN 6-.16

2. ATTHE 41/2" VORTEX CASE Unusable F.O. = 45.13 GAL.

Usable F.O. = 508.90 - 45.13 = 463.77 GAL Run time 41/2" Vortex & .89 S.G. 463.77 6.16 = 75.29 MIN From SP-3EGF-il, the process setpoint of 30.5" is equivalent to an instrument setpoint of 8.70 inches of water. This instrument setpoint is based on an average specific gravity of.825".

Currently, the specific gravity range is .83 .89. Assuming .825 .83, the instrument setpoint of 8.70 inches of water is considered valid for .83 S.G. For the case of the higher specific gravity of

.89 the process setpoint is determined to be:

8.70" J. Current Instr. setpoint = .825 = 10.54" is equiv. to a 30.5" process setpoint For S.G. => 8.70".89 = 9.77" is equiv to a 29.72" process setpoint of.89 The resulting volume of F.O. that corresponds to the normal-low process setpoint of 29.72" is determined as follows:

29.72" Depth ratio = 47.625" = .6240 Deoth Ratio Vol. Ratio

.62 .6513

.6240 Y

.63 .6638 Calculation 91419-152M3 Rev.O Pag- 66 of 80

BODY OF CALCULATION (cont'd)

.0040 -

X

.01 .0125 X = .005 Y = .005+ .6513 =.6563 Vol. Ratio Total day tank vol. at the normal-low actuation point and = 550 x .6563 = 360.97 GAL.

.89 S.G.

1. AT THE 2" VORTEX CASE Unusable F.O. = 22 GAL.

Usable F.O. = 360.97 - 22 = 338.97 GAL Run time 2" Vortex & .89 S.G. _ 338.97 6.16 = 55.03 MIN

2. AT THE 41/2" VORTEX CASE Unusable F.O. = 45.13 GAL.

Usable F.O. = 360.97 - 45.13 = 315.84 GAL Run time 41/2" Vortex & .89 S.G. _ 315.84 6.16 = 51.27 MIN Utilizing the same i3" inaccuracy as specified in Calc. SP-3EGF-11, the high-low actuation point would be (29.72" + 3") 32.72" and the low-low actuation setpoint would be (29.72" - 3")

26.72".

The resulting volumes of F.O. that correspond to these process actuation points are determined below:

K. FOR THE LOW-LOW ACTUATION SETPOINT WITH .89 S.G. F.O. (26.72")

76 72" Depth Ratio = 47.625, = .5610 Deoth Ratio Vol. Ratio

.560 .5763

.5610 Y

.570 .5889 Calculation 91-019152M3 Rev.O Page 67 of 80

l BODY OF CALCULATION (cont'd) i

^

.0010

• X

.01 .0126 X = .0013 Y = .0013 + .5763 =.5776 Vol. Ratio Total day tank vol. at the low-low  !

actuation point and .89 S.G. = 550 x .5776 = 317.68 GAL.  ;

1. ATTHE 2" VORTEX CASE Unusable F.O. = 22 GAL. l Usable F.O. = 317.68 - 22 = 295.68 GAL Run time 2" Vortex & .89 S.G. _,295.68 -

48.0 MIN 6.16

2. ATTHE 41/2" VORTEX CASE Unusable F.O. = 45.13 GAL.

Usable F.O. = 317.68 - 45.13 = 272.55 GAL Run time 41/2" Vortex & .89 S.G. _ 272.55 6.16 = 44.25 MIN L. FOR THE HIGH-LOW ACTUATION SETPOINT WITH .89 S.G. F.O. (32.72")

Depth ratio = 47 2 = .6870 Dcoth Ratio Vol. Ratio

.680 .7241

.6870 Y

.690 .7360

.0070 _ -

X

.01 .0119 X = .0083 -

Y = .7324 Vol. Ratio Calculation 91419-152M3 Rev.O Page 68 of 80

BODY OF CALCULATION (cont'd)

Total day tank vol. at the high-low actuadon point and = 550 x .7324 = 402.82 GAL.

.89 S.G.

1. AT THE 2" VORTEX CASE Unusable F.O. = 22 GAL.

Usable F.O. = 402.82 - 22 = 380.82 GAL Run time m 2" Vortex & .89 S.G.

, 380.826.16 = 61.82 MIN

2. AT THE 41/2" VORTEX CASE Unusable F.O. = 45.13 GAL.

Usable F.O. = 402.82 - 45.13 = 357.69 GAL Run time 41/2" Vortex & .89 S.G. _ 357.69 6.16 = 58.07 MIN

5. The length of Diesel Generator Run Time based on the Follow Pump High and Low Actuation Set points (including instrument accuracy) 3EGF*LS41A/B - Ref.14.

The accuracy of instruments 3EGF*LS41 A/B is 3.0 (Ref.14).

The normal-high set point level is 40" 3".

The normal-low set point level is 24" t 3".

The high actuadon set points are the same as for the lead pump (3EGF*LS40A/B - Ref.13).

- The run dmes, etc. are the same as those previously calculated for the high set point plus the tolerances for 3EGF*LS40A/B.

A. At 27" Actuation Point (High-Low Actuation Point) 27" Depth Ratio = 47.625" = .5669 4

Volume Rado Per Ref.1 is:

Denth Ratio Volume

.56 .5763  ;

.5669 Y

.57 .5889 i I

Calculation 91-019-152M3 Rev. O Page 69 of 80

BODY OF CALCULATION (cont'd)

.0069 _ X

.01 - .0126 X = .0087 Y = .0087 + .5763 = .5850 Vol. Ratio The Total Volume of(Usable and Unusable)-

F.O. at the 27" Actuation Point equals 550 Gal x .5850 = 321.7 Gal.

The length of DG run time based on 27" actuation point is calculated as follows:

1. For a 2" Vortex Depth Total Vol. = 321.7 Gal Unusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth U:able F.O. = 321.7-22 = 299.7 Gal.

299.7 Run Time at 27" Actuation Point of = 6.16 = 48.6 Minutes 3EGF*LS41 A/B (2" Vortex Depth) 1

2. Similarly for a 4 /2" Vortex Depth Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 321.7 - 45.13 = 276.57 Gal. ,

6.57 Run Time at 27" Actuation Point of = = 44.9 Minutes

}6 3EGF*LS41 A/B (4I/2" Vortex Depth) ,

l B. At 24" Set Point (Normal-Low Set Point) 24" Depth Ratio = 47.625" = .5039 4

Volume Ratio Per Ref.1 is Calculation 91-019152M3 Rev. 0 l 1 Page 70 of 80

i BODY OF CALCULATION (cont'd)

Deoth Ratio Volume

. .50 .5000

.5039 Y

.51 .5128 4

.0039 _ X

.01 ~ .0128 X = .0050 Y = .005 + .500 = .505 Vol. Ratio n

l The Total Volume of (Usable and Unusable)

F.O. at the 24" Set Point equals 550 x .505 = 277.75 Gal.

The length of DG run time based on 24" set point is calculated as follows:

1. For a 2" Vortex Depth Total Vol. = 277.75 Gal Unusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth Usable F.O. = 277.75-22 = 255.75 Gal.

255 7 Run Time at 24" Set Point of = = 41.5 Minutes 66 3EGF*LS41 A/B (2" Vortex Depth) 1

2. Similarly for a 4 /2" Vortex Depth Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 277.75 - 45.13 = 232.62 Gal.

'32 6'~

~

Run Time at 24" Set Point of =

6.i6 = 37.76 Minutes i 1 3EGF*LS41 A/B (4 /2" Vortex Depth)

Calculation 91-019152M3 Rev. O Page 71 of 80 l

L- , ,,

o  !

I I

l BODY OF CALCULATION (cont'd) i C. At 21" Actuation Point (Low-Low Actuation Point) i 21" j Depth Ratio = 47.625" * '

Volume Ratio Per Ref.1 is:

Deoth Ratio Volume

.44 .4237

.4409 Y

.45 .4364

.0009 _ X

.01 ~ .0127 X = .0011 Y = .4237 + .0011 = .4248 Vol. Ratio

. The Total Volume of (Usable and Unusable)

F.O. at the 21" Actuation Point equals

550 Gal x .4248= 233.64 Gal.

The length of DG run time based on 21" actuation point is calculated as follows:

1. For a 2" Vortex Depth Total Vol. = 233.64 Gal Unusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth

~

Usable F.O. = 233.64-22 = 211.64 Gal.

Run Time at 21" Actuation Point of = f,g.64= 34.3 Minutes 3EGF*LS41 A/B (2" Vortex Depth) 3

2. Similarly for a 4 /2" Vortex Depth Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 233.64 - 45.13 = 188.51 Gal.

i 4

Calculation 91419152M3 Rev,0 Page 72 of 80

4 BODY OF CALCULATION (cont'd) 188.51 Run Time at 21" Actuation Point of = = 30.6 Minutes 6.16

) 3EGF*LS41 A/B (41 /2" Vortex Depth) i The following calculation is performed to determine the variation in the process setpoints (40" i high - normal and 24" low-normal) of the follow pump due to a variation in the specific gravity of the fuel oil used. From SP-3EGF-12, the process setpoint of 40" is equivalent to an instmment setpoint of 16.5 inches of water. This is the same setpomt as for the lead pump (SP-3EGF-11).

Therefore, the results of the lead pump high-normal setpoint calculation, adjusted for the specific gravity of.89,is also applicable for the follow pump. From SP-3EGF-12, the process setpoint of 24" is equivalent to an instrument setpoint of 3.3 inches of water. This instmment setpoint is based on an average specific gravity of.825. Curmntly, the specific gravity range is .83 .89.

Assuming .825= .83, the instrument setpoint of 3.3" of water is considered valid for .83 S.G. For I the case of the higher specific gravity of.89, the process setpoint is determined to be the following:

, D. Current instrument setpoint = 3 3".825 = 4" is equivalent to a 24" process setpoint  :

For spec. gmvity => 3 3"j9 = 3.70" is equivalent to a 23.7" process setpoint of.89 The resulting volume of F.O. that corresponds to this normal low process setpoint of l 23.7" is determined as follows:

23 7" Depth Ratio = 47j25., = .4976 i Denth Ratio Vol. Ratio

.490 .4872

.4976 Y

.50 .5000

.0076 _

X

.01 .0128 X = .0097 Y = .0097 + .4872 Y = .4969 Vol. Ratio l

Calculation 91-019-152M3 Rev.O Page 73 of 80

BODY OF CALCULATION (cont'd)

Total day tank vol. at the normal-low setpoint and = 550 x .4969 = 273.31 G AL.

.89 S.G.

1. AT THE 2" VORTEX CASE l Unusable F.O. = 22 GAL. I Usable F.O. = 273.31 - 22 = 251.31 GAL I

Run time l 2" Vortex & .89 S.G. _ 251.31 6.16 = 40.8 MIN

2. AT THE 41/2" VORTEX CASE I

Unusable F.O. = 45.13 G AL.

l Usable F.O. = 273.31 - 45.13 = 228.18 GAL l l

Run time 41/2" Vortex & .89 S.G. _ 228.18 i 6.16 = 37.04 MIN 1 Utilizing the same i3" inaccuracy as specified in Calc. SP-3EGF-12, the high low actuation  !

point would be (23.7 + 3") 26.7" and the low-low actuation setpoint would be (23.7" - 3") 20.7".  ;

1 The resulting volume of F.O. that corresponds to these process actuation points is determined )

below.

E. FOR THE LOW-LOW ACTUATION SETPOINT l

Depth Ratio = 4f525., = .4346 l

Denth Ratio Vol. Ratio '1

.43 .4111

.4346 Y

.44 4237 l

Calculadon 91-019-152M3 Rev. 0 Page 74 of 80

BODY OF CALCULATION (cont'd)

.0046 _

X

.01 .0126 X = .0058 Y = .0058 + .4111 =.4169 Vol. Ratio Total day tank vol. at the low-low actuation point and = 550 x .4169 = 229.29 GAL.

.89 S.G.

1. AT THE 2" VORTEX CASE l- Unusable F.O. = 22 GAL.

Usable F.O. = 229.29 - 22 = 207.29 G AL Run time 2" Vortex & .89 S.G. 207.29

= 6.16 = 33.65 MIN

2. AT THE 41/2" VORTEX CASE Unusable F.O. = 45.13 GAL.

Usable F.O. = 229.29 - 45.13 = 184.16 GAL Run time 3 41/2" Vortex & .89 S.G. _ 184.16 6.16 = 29.9 MIN I

F. FOR THE HIGH. LOW ACTUATION SETPOINT Depth Ratio = 4f62 ,, = .5606 Denth Ratio Vol. Ratio I

.56 .5763 i

.5606 Y 37 .5889 l

l l

Calculation 91-019-152M3 Rev. O I Page 75 of 80 l

l l

BODY OF CALCULATION (cont'd) '

0006 _

X

.01 .0126

, X = .0008 l l

l Y = .0008+ .5763 =.5771 Vol. Ratio j Total day tank vol. at the high-low actuation point and .89 S.G. = 550 x .5771 = 317.40 GAL.

1. AT THE 2" VORTEX CASE Unusable F.O. = 22 GAL.

l t

Usable F.O. = 317.40 - 22 = 295.40 GAL i Run time 2" Vortex & .89 S.G. _ 295.40 6.16 = 47.95 MIN 1

2. AT THE 41/2" VORTEX CASE Unusable F.O. = 45.13 GAL. I Usable F.O. = 317.40 - 45.13 = 272.27 GAL I

Run time J 41/2" Vortex & .89 S.G. _ 272.27 6.16 = 44.20 MIN -

{

i

6. The length of Diesel Generator Run Time based on the 205 gallon minimum F.O. Day Tank Volume as specified in the Technical Spec. (Ref. 9) j A. Based on a 2" Vortex Depth i

Total Day Tank Vol.

j Per Tech Spec. = 205 Gal  ;

I (Ref. 9) j l \

l Unusable F.O. l l

Vol. Based on = 22 Gal '

2" Vortex Depth Usable F.O. = 205-22 = 183 Gal.

! Calculation 91419-152M3 Rev. 0 l Page 76 of 80 l

l

BODY OF CALCULATION (cont'd)

Run Time at 205 Gal Day Tank Min. =

.16 = 29.7 Minutes )

Volume Per Ref. 9 OVith 2" Vortex Depth)

B. Similarly for a 4 1/2" Vortex Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 205-45.13 = 159.87 Gal.

! Run Time at 205 Gal Day Tank Min. = 25.95 Minutes l 1

Volume Per Ref. 9 OVith 4 /2" Vortex Depth) I l 1

7. Volume of oil required in the F.O. Day Tank to satisfy the ANSI N 195-1976  !

requirement to " Maintain at least 60 minutes of operation at the level where oilis I automatically added to the Day Tank...plus a minimum margin of 10%".

The fuel consumption rate of the EDG at 100% of rated load is 6.16 (Ref. 7). At 110% of rated load, the fuel consumption rate is:

1.1 x 6.16 gpm = 6.78 gpm

= 60 Min /hr. x 6.78 gpm Fuel consumption at 110% = 406.8 Gal/h r of rated load i

Use 407 Gal /h r Per ANSI N 195 1976 (Ref. 23), I hour of diesel operation (usable fuel) is required.

A. Based on a 2" Vortex Depth Unusable = 22 Gal. l F.O. (2 in. vortex) l Themfore the total F.O. required in the Day Tank to provide 60 minutes of run time at 110%

load and accounting for 2 inch vortex is 407 Gal + 22 = 429 Gal. i B. Similarly the total F.O. required in the Day tank to provide 60 minutes of run time at i10% load and accounting for a 41 2/ inch vortex is 407 + 45.13 Gal = 452.13 Gal.

Calcutation 91019-152M3 Rev.O Page 77 of 80

BODY OF CALCULATION (cont'd)

C. Based on the required F.O. volumes determined above, determine the F.O. Day Tank level this corresponds to.

Total Tank Vol. = 550 Gal Usable and Unusable F.O. Vol. Based on = 429 Gal 2" Vortex Depth 429 Vol. Rado

= 550 = .780 Vol. Ratio Deoth Ratio

.7708 .71

.7800 Y

.7821 .72

.0092 X

.0113 * ~0i X = .0081 Y = .72+ .0081 = .7281 Depth Ratio Tank Depth = .7281 (47.625") = 34.68" 429 Gallon => 34.68" above tank bottom with 2" Vortex considered use 35" 1

For the 4 / 2" Vortex case, the Usable and Unusable tank volume is => 452.13 Gal Vol. Ratio = 452.13 550

= .8221 Vol. Ratio Depth Ratio -

.8155 .76

.8221 Y

.8263 .77

.0066 X

.0180 ~ .01 X = .0061 Y = .76+ .0061 = .7661 Deoth Ratio Tank Depth = .7661 x 47.625" = 36.49" 452.13 Gallons => 36.49" above tank bottom with 41 h" Vonex considered use 36J"  !

l l

Calculation 91-019-152M3 Rev. O l Page 78 of 80 l

1

~

BODY OF CALCULATION (cont'd)

8. The length of Diesel Generator run time based on the 490 gallon volume specified in operating procedure OP3346B (Ref. 22)

Total Day Tank Vol.

Per O.P. 3346B = 490 Gal (Ref. 22)

Unusable F.O.

Vol. Based on = 22 Gal 2" Vortex Depth Usable F.O. = 468 Gal.

Run Time at 490 Gal Day Tank = 616 = 75.9 Minutes Volume Per Ref. 22 (With 2" Vortex Depth)

Similarly for a 4 3/2" Vortex Unusable F.O. Volume = 45.13 Gal Usable F.O. Volume = 490 - 45.13 = 444.87 Gal.

444.87 Run Time at 490 Gal Day Tank = 6.16 = 72.22 Minutes Volume Per OP3346B (With 41 /2" Vonex Depth) 4 f

l

)

Calculadon 9l-019-152M3 Rev.O Page 79 of 80

__ _ _ _ _ _~ . _ . _ _ _ _ _ _ _ _

1 CONCLUSIONS

1. Emergency Diesel Generator Fuel Oil Storage Tank A. With the storage tank filled to its capacity of 35340 gallons of fuel oil, the FSAR (Section

9.5.4.3) commitment of having " tanks sized to store sufficient diesel fuel oil for a 1

minimum of 3 /2 days of continuous operation of an emergency generator at rated load" is satisfied.

B. With the storage tank filled to its 95% level, which is the normal maximum fill level per Ref. 22, and considering instrument inaccuracy and high S.G. fuel oil, the storage tanks contain fuel oil for a minimum of 3.44 days of continuous operation of an emergency generator at rated load. This does not meet the FSAR 31/2 day n:quirement.

C. The Technical Specification specifies "a separate fuel storage system containing a minimum volume of 32,760 gallons of fuel." With the storage tanks filled to the 88%

, level (the Tech. Spec. Minimum Level) and considering instrument inaccuracy and the maximum actual recorded S.G. adjusted for temperature, the calculated fuel oil volume is approximately equal to the tech. spec. volume (32686 versus 32760 gallons).

2. Emergency Diesel Generator Fuel Oil Day Tank A. The FSAR(Section 9.5.4.2) states that "Each EDG. Fuel Oil Day Tank is sized to store approximately 550 U.S. gallons of diesel fuel oil."

Based on this calculation, a completely filled day tank contains 550 gallons, however, the total volume of oil in the day tank corresponding to the normal high level pump-off setpoint (with instrument inaccuracy of13") and S.G. of.89, ranges from 509 - 440 gallons.

B. The FSAR states that, "Each diesel engine is equipped with an independent fuel day tank with a total capacity for 1 1/2 hours of post accident load". Assuming worst case conditions of fuel oil with high S.G. (.89), 3" instrument inaccuracy and maximum unusable fuel oil due to a 41/2" vortex, the range of diesel generator run time at the normal high level pump-off setpoint is 1 hr-15 minutes to I hr 4 minutes. This does not comply with the FSAR requirement.

C. The FSAR(Section 9.5.4.5) states that " Level switch setpoints are determined in accordance with the guidelines of ANSI N195." In accordance with ANSI N195-1976, "Each diesel shall be equipped with day or integral tank or tanks whose capacity is sufficient to maintain at least 60 minutes of operation at the level where oil is automatically added to the day tank or integral tank or tanks. This capacity shall be based on the fuel consumption at a rated load of 100% of the continuous ratmg of the diesel plus a minimum margin of 10%."

Based on this calculation, the level of oil in the day tank that is required in order to satisfy the above ANSI N195 inquirement is 36.5" (or 407 gallons of usable fuel oil). Assuming fuel oil with a S.G. of.89 and instrument inaccuracy of13.0", the normal-low pump-on setpoint would provide only 44.25 to 58.07 minutes of operation at the rated load only.

Therefore this c ces not comi.ly with the FSAR requirement.

Calculation 91-019-152M3 Rev.O Page 80of 80

ATTACHMENT 1 "The Power Handbook" 2nd Edition by the Editors of Power Magazine, Copyright 1983 by McGraw-Hill, Inc.

Page 36, " Tanks - Figuring Their Capacity".

Calculation 91-019-152M3 Rev.O Page Al-1 of 2

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ATTACHMENT 2 Engine Data From Ref. 7, Page 4-4 i

Calculation 91-019152M3 Rev. 0 Page A21 of 2

ATTAGHMFNT 2 cmc. NO.c3 \-0\9- \52 M3 4'

P A G E Q 2 'Z o-Ir 2 ENGINE FUEL SYSTEMS 4.39

.. Engine-driven fuel pump capacity, gpm 12 4.42 Emergency fuel pump capacity, gpm 12 4.43 Emergency fuel pump, de mot'or, hp 2.0 4.45 l Fuel oil day tank capacity, gal 275 cal. minimum 4.46 Type of fuel oil No. 2 4.47 Engine fuel consumption at rated load 4.49 and speed, gpm 6.16 4.50 System pressure, psig 25 4.51 ENGINE LUBRICATION SYSTEMS 4.56 Lube oil SAE rating and type SAE 30 4.59 Engine-driven lube oil pump capacity, gpm 400 5.1 Lube oil circu2 sting pump capacity, spm 45 5.3 Lube oil circu.ating pump motor, hp 7-1/2 5.4 System pressure, psig 100 5.5 011 fill capacity, gal 2300 5.6 Engine lube oil consumption, qt per hr 5.6 5.7 Oil temperature to cooler, F 165.4 5.8 011 temperature from cooler, F 150 5.9 ENGINE COOLING WATER SYSTEMS 5.13 Cooling water system capacity, gal 700 5.16 Cooling water temperature, F 5.17 Maximum 180 5.18 Minimum 120 5.19 Engine-driven cooling water pump 5.22 capacity, gy:: 913 cmm 5.23 Jacket water keep warm, pump 5.26 capacity gpm 90 5.27 Jacket water keep warm pu=p motor, hp 3/4 5.29 System pressure, psig 56 5.30 Expansion tank capacity, 500 gal 500 5.31 Electric water heater rating, kw, voltage, 5.33 phase Jacket We'er 18 Kw 3/60/460 5.34 Lube Oi' 15 Kw 3/60/460 5.35 Heat exchangers 5.39 Number Two per diesel 5.40 SBill 90-10 5.41 '

Tube material Cu-ni 5.42 Tuba Side Material Solid 90-10 5.45 Cu-ni or 5.46 (other than tubes) Carbon steel 5.47 with Cu-ni 5.48 overlay 5.49 Shell material Steel 5.51 Minimum raw water flow required at 8,,0*F E.53 inlet temperature, gpm 1900 5 . S t. j ms12179-61f 10/03/84 181

ATTACIBIENT 3 Viscosity of Fuel Oils from Cameron Hydraulic Data (Ref. 34) t v

+

l l

Calculation 91-019-152M3 Rev.0 (

Page A3-1 of 2 l

i t  !

STONE E, CESSTER ENGINEERING CORPOR ATION CALCULATION SHEET me u CALCUL ATION IDENTIFICATION NUMBER O

' J. O. O R W. O. N O. OlVISION 0 GROUP CAL CUL A TION NO. -W T l C "', L "P M SE

' PAGE MEcuAhit c/M.91-019 -152 M3 i A3-2 d 2.

REv. O

--ATT A C M M E N T 3-4

. 7 .

3 INGERSOLLRAND

. CAMERON HYDRAULIC DATA 7 . . _. !

VisCo'ity s of Fuel Oils

• (

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ATTACHMENT 4 Figure 2, " Critical Submergence Dependence on Fa Number", from Reference 29. i i l I Calculadon 91-019151M3 Rev. O Page A4-1 of 2

g,sl wnters'** have stucied sir entr:inment but it is so C A L C . niO H i L & d's tv 8 l j;'d'eult to conclude frors the individurJ exgnments how ,,,, WO ,

83. air entrainme:t vaned wnh other para.rneters. s2 y ',7 4

3  ! r.,,g,me use suerserpnee 2.s a function of ,I , velocity he:d.,.. a..others ,y use submergence)j I f.",! Eq. (2). Ac (P.cynnids' numbe-) esn safeiy be c!imi- .

                                                                                                                                                   ,,[             ~.'                                   i
                     " i d from the 6 eld cf the present problem, since vor c.t te. I h.enation is a surface phenomenon.

s .

                                                                                                                                               ,r'-                 ,.
                                                                                                                                        # //                        rp
'     "r                 gence the forma:for . ' a vonex depends on the Froude                             -                       / j/               a.     .       L                                 <!
                                                      .emerpnee (sid). and wave pars-                  24 el .                                                                                                                                                          ,,,-
                                                                                                                        / f ,/

fp ,; s: j',.geder (Er). crideal , p fers (1.!ht Therefore: 4 -

                                                                                                                                       ,                                                              )

i')

     ~

l* sld-clTFr.J.;h) .. (3) j*. 0*3', . f./ *,

     "j pe s:nnyth of the vonex depe:ds on de velocity of.'.,ow y; 2nd hence on the Troude cutsber. However. the inception
                                                                                                       *                     //    .                                                                  ,

i'

                                                                                                                           //,               ,,s*,                                                   ;

g gra tones as, a, dimple formatien depends on the ductus. . {/ p L u,,n of von 2 city, which sp>n depends on the wsve . . *. c'

     *8      e           earneter.

j 1 I' Sever 21 rypes of bases were sug;ested for vene.t pre- Nj* . q[ ,,ntio n': and all reduce the wave parameter ne:r the e i

    . ., l inute. thu.s rtducing the chanp in vorticity and hence
    ",' i genes for nsdon.                                                                              *         **         88         '2       "    28       2*     28     J2     28
       1                                                                                                                                                                  ""*'

For shallow water Jih is a decisive par: meter for vertex 'T p ,%,,,,,o, ,, ter-n: den, but for deep water its inauence will be neglig. 4

                    ; die. However, there is no published experimental dsta                                                  *
                                                                                                                                    ""'"*"*""-                        NGE svailsble to correlate crideal submerpace as a funedon                                                    = Mda rasvw wm                             A4-2 0         Z.      . p'!

e c( was e parameter. ' .. I In expenments at Loughborough University. UW,

                                                                                                                           ~~""

pear.e.o, a cu w . { 1 sortex formation was reduced in a rectanplar sump by ' " " ' " " " j 4 h uung verdcaJ bases which suppressed the wave pararneter * "

• 4
• 8 '"' ** -'m "" I ne:r the intake. .. pa snoww wm. ..iue. ,.

F.ecenti,v Gordon'showed the scale e.Tect by comparing p a sp.e..,,ow wm m..

             , Aeld studies with the laboratory studies of Dennv and
                                                                                                                              ,                 .                    .. .                         ]

2 v oung . The disparity between the two sets of results N A C'* 8 d**'F'" #*'"# '" ** #' "'"" **' .

                    .ould have been narrowed if the resdis were plotted at the same wave pararmeter.

j; 2b8 a In a eenvendonsJ hydreelectric power plant the tota) prevention the en. .ecal submergence should always be

Jepth h. of wateris generally 1st'e ecmpared to the wsve creater than 6 Freude number.

fength J., and Eq. (3) may be written: Thus vortex incepden is possible when J/d< Tr, and the  ;. vortex formation tradency ts least when s/d>Fr. 0 3/d- f(fr)-([rjy(gd)) All the experimental restdts lie on a band, the lower line

                                                                               "'      (4)                                                                                                        -{

of which correspoeds to 3/d-Er, and the upper line l Gordon' found, by trial and error, a dedgn equation for o eo r. it should be noted that the results of Dency

            , ddee! tubmergne., which was:                                                                            2
                                          *                                                . and Youeg are                 based on pige diarneter instead of inlet 8
                                   .                   3-evd'                                    diameter, d. and the s/d eurves should be lower than those                                      fJ
                                                                              ...      (S)       shown in the Sgt:re. This ar.alysis is correct only for the                                    ,J[

case of conventionalinjets. jt q...ar @e value of e v.aried from 0 3 to 0-4 By using devices like venical or hori: ental bases, or i Howevi;r. some of the results which he quoted from floating rafts, the erideal sub=ergence line can be brought E 5,=,cdish sources haa e values of 01 snd 0 21. It is reason-

  -t             s.ac. iner.. ore, to                                                            down (as shown by the thich cir:!:s in Fig. 2), thus re-                                       21 I, 'rmmetry) of themis               , assume te.        that e is a function of shape ducing s/d require =ents.                                                                            4 For symmetneal and w ell-desi;ned intstes, the nlue of                         la conclusion, when vertex peve:: tion devices are used.                                  II
                 .                                                                              r;d- /r (otherwise sid- 1 + Er) will give vortex. free                                          ?.

u,'n mil be, low and for complic:ted designs the value of e operation either in hydroelectric practice or pump sump be higher. I If cne assumes th:t Eq. (4) holds ;ood for a.pne .d dedyn. it is hoped that future research willindicate theinnuence '

          ! * 'h'3:

5 of the wave parameter on vertex fortnados. g, ' s/d- r/v'(Jd ) or := rd'lc; ... ,(6)

                                                                                                                                                                                               $q . .

I "

  ,r1            ,f.: u(f'l reduces to the form (EO. Sh:n by Gordon. with f,"N *t p. E. and Pere. J. A. "E.t;< time::s on a tr.all pur p t,
                           !ue of e=01 6 snd 0 319 with Bridsh :nd SI units.,                         r.ictica weu. with pa. cutar nfe ence to venex forr.ations".

N Dita e!v.

     '                                                                                                froerttiert. De Inst:t;:ies of Mechanicaj E:rinec s. Vel 170.

i . ,, Eig. I. test resultssre ;40tted in non dimensienal

• u ,7 ith 3,d en t..e ratis sne Froude number [r, s t,cdi) . v. D. F. and You.o. G. A. J. "De ertvention of vor'ico w mfg at in.g n a, p.,,,,dingr. IAH R 7th Conn, t.ish 1

N v :w. up to a FreuJe number Of.t4. The mults

                      **1.* re, rNr.t i .:.:ie, with s er:: y.. w hert. .4 s!! Ing .i isves attn.         ?.

H. V'. "Sr.: dies of sur e sence neuire-.:nis or 'u;5 e terutta

                           . q. . . p. reIrNnt
                                         . . r .h. ceerit"H 2.r. eqM"es..
                                                                    "er " ',rIhe me,:s
                                                                                   . ur 3, 4.. c ".. w^*. W     J. L.i -W  . c~   25~.

- a n : 1::E:~3#"n es'".^% A:ri

                                                                                                       % ,c ,,t ,,2 e,n=:y,y,g,-;ngenu ene,.a.U-u Powr5ME 1970       Y'I I!-

;esme3 :n

          ; , ,,'e Le en,utet hae sid- Tr. i-dic: ting that (Or s onet                               sones r. e _.2;c- 9. i s:er n ever..'ew" <a-ai:irr reid "-
  '#j "%-e                         v a:n .; .

ATTACIIMENT 5 Figure 3, " Minimum Submergence Limits for Intakes with both Symmetrical and Lateral-Approach Flows," from Reference 30. Calculadon 9l-019-152M3 Rcv.O Page A5-1 of 2 i

                                                                                                   - . .    ./7 / / cxv /           )
                             ,                                                                                              s.

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        ,a d

l l

                                                                                                           , l ,-(                       '""""" 3 . -            <

j

                                                                                         ,                                g    -                                                                -
     .' l
     ~6
                                                  =. ,

o p g }

                 .                      i

[ I ' jt - . s ., '. i . /l .. ** j ie ^ o . r_ - j' ;f -.. r' * .

• e

                                 ..                   ,                   o
                                                                                  .                                           o            s                  to         .s            :o f
                                                                                  ~

t V

               ,                                         j V                                                                   . H.*s~m m eintr e s 1
                                                        ,       ,o          g        2              ,,      a        g         = w.ews -m erces
                                ,                                                   del

• flg. 4. Intehts plotted on a chart deutloped by Otney o 4 -

p. 8 jj- C **$"**'"*"* develop into vertiecs which draw air into the pii O (dl  ! o w.xn m m cic,, Once air is entrained vortices become a probicm.

                                                                                                                        in conclusion, it is apparent that further resca e                         Ij                      [- ., ;p- %% _ %m required into the factors which sffect vorter form Due to the scale elTect, this could best be undertak D6                        k                 rig. s. Minimum submer#enet limits for intakes with both symmetri.     **d. existing hydto intskes where the now un
                           ,,                   esi- and /4teral. approach /le,,                                       rese voir low supply level can be varied am necessa
                       . .1 g -

intakes which have a symmetrical approach How with 4 submergence of at least: References S=0 3 V (d)* 1. AswAm. H. O. " Vortices at Low Head Intakes". Wan n l

                                                                                                               .. (3)       November.1967.

which corresponds w.th the lower limit of the shaded area 2. Dtww. D. F. et al. "The Prevention of Vortices and S intakes". Paper Cl Proerer/inss. 7th Cencrol Mccrine, i on Fig. 3, and for intakes with a lateral approach now the Lisbon. Portugs!.1957.

           .E minimum submergence will be incressed to:                              3 L^wton. F. L. "Faetors Induencing Flow in Large C. r.
   *                   .* *'                                                                                                Report of the Task Force on Flow in Large Con.'.nw            .

1t 5= 0 4 V(d)* ** (4) Committee on Hydraulic Structures. Transorti,mv ASt t . I 4543. Vol. 91 H% November.1961.

 .r li     :

which conesponds with the upper limit of the shaded area on Fig. 3-d- L'"^k r. R. " Flow Problems with revect to iniak. Tunnels of Swedish Hydro Elcetric Power Ptsnts". Trans

  !                                                 Some confirmation of the foregoing submergence criteria of the Royal Institute of Te:hnology. Stockholm                 S-ll               can be obtained from Lennart* who gives data on several NR 71.1953.

j intakes in Sweden which exhibit vortices. At the Atorp - 9 1,e ll; power plant, Lennart reporu that "a rather strong surging vortex arose. This sucked down tra.sh towards the racks."

s The submergence of the intake at Atofp corresponds to l' ti approumately S=U l V(d)1 with the unit ai full icad.

[J 1 4 Lennart further reports that at lower discharges the eddy

.g                   1- jl zone decreased correspondingly and at about 15m8 /s it 9                  i, il                     became imperceptible". At this lower flow the effective h                                             submergence increases to 5=0 3 V(d)*.

C A LC. NO. 9 \-Ol9 -\5'2M3' i

           ,        I ;, ; L                        For the Hammarforsenintake, also reported by Lennart.

Q l lI}

 '+                     '                      strong vortices were evident at a submergence equivalent                                                            D. O to Sn0 23 V(d)*. and the now approached the intake at

[

                    ;ii, 'l ly                 an angle of at least 30-15' from the perpendicular to the                   ppg { Q g_ g , $ g, j,.'                       front of the intake. It would be interesting to know if these 4
"'                 g      ' l lIl              verti:es disappeared when the !!cw w:s redu:ed,in:: casing
                   ;                           the effective submergence to S=0 4 V(d)+.

t j .h An idea of the scale effect can be obtained by comparing l ti fl the submergence criteria with the results obtained by 2 Denny from model experiments. Fig. 4 shows the intakes

?

h ,,

                   $'i)i pielted on the4h7tt descioped by Denny (Fig.13a in Ref. 2). All the intakes, with one exception, plot in the

.n I re; ion where vortices could be expe:ted from model

                   'I i              studies, whereas e.tperience indicates that only four have lj             encountered troubleseme vort!ces. A partial explanation M                      :

4. I

                            .                  may be in the de5nitien of "vortet problems". For hydro. intakes the dese!epment of sinall surface ritiles or
}

l l swirls is of no concern, provided the swirls do not

                                                                                                                                                                            !   . -4 $       ,*

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                         ...-u--                                              NUSCO k     'yJ      .'7L' %u,-i'"

CALCULATION CHANGE NOTICE (CCN)

                                                                                                                      "^ "

OPsm 3m 1 * /2 g AmCT60 CACULATON/ PLANT O uPi O uP2 55uP3 O Cv O OTan C4CtA.ATON NO. REVISpaN NO. CMANGE NO. CALCULATION OR2GINATED BYi 9l-0/9 -/62M3 u O-00t of% O vENoen

     ,j                      101} $       f/y1ffdinCQ'hiff             h!stl/C-    0 /*   kHO          rHfj fo $f r~

Va &ing fd 0.2 G4<act leve/2 REFERENCE *J l See no a w

 ] RE ASON FOR CHANGE 5 pes ig EDS ntn &ver unau' w udeaje uns& % ~,

a cu m na avn/ aue Aa/ Jhe a %e atw< /r/ o,L d, P2. 7 e y < i CESCRIPTION OF CHANGE & TECHNICAL JUSTIFICATON

1. Dws/ rcen ,4aw haea'n A'u .//uaye /su & u '/y nea ns/ Ac us,.o aue due 10 /w pas.ne e$c / o,t Q l cud Au b u n + otro r on ,% /af ne A iuoc< >. p .

2. lXC!c{ rit n lt'n?ef ,ba.4W pa //y' Q hr/c- m oe/C.

anf.cd d 7000k< >J 4 7 s;/ Ma djact 9 w w h'^ l $ 'UCLEAR WOICATOR

            '                 ^

AFFECTED CALC. PAGES 0 "* *~ D'** Cale panes 2 and 4, ntoi7acer added43kRmf. 79A/Am t PREPARED BY:(PRWTEO NAME) .# StGNATU / OATE l?S $4YY/ANS/A REviEWEO BY:(PRWTED NAME)

                                                                     .)

Si6NA TURL b/S$/

                                                                                //

['l0' OATE .i WINIM1 5. bMA I/ Ws - h d !O 5 ] APPROVED BY:tPRNTED NWE) SIGNATURE g DATE a . [ / k

L ( / V L/ wt . Plffofl$ w, c/rol9.'. II. FUEL 01 DAY TANKS O k#

1. Deter,n nation of the ca 3acity (gallons) of the fuel oil day tanks and identific ation of the usa yle and unusable volumes considering -

w rte x g e n e ra ti o n . .. .. . . .. . . . .. .. .. . . . . . .. . . .. .. . . .. . . .. . . . . . . . . .. .. . . .. . . .. . . .. .. .. . . .. .. .. .. .. .. . . .. . . .. . . .. . . .. . . 4 5

- "- ~                                                                                                                                                                                  ~

2. Determination of the amount of usable fuel oil and diesel run time .~

with the day tank filled to the low. low alarm setpoint of 18"................................. 53 l

3. Determination of the amount of usabk fuel oil and diesel nm time with the day tank filled to the low lev.11 alarm setpoint of 23" ............................... 55 1

4. Determination of the amount of usable fuel oil and diesel run time I based on the lead pump high and low actuation setpoints  !

(inclu ding instrum ent maccuracy)..................................... .................................... 5 6 '

5. Determination of the amount of usable fuel oil and diesel run time l based on the follow pump high and low actuation set  ;

(including instrument inaccuracy)... .... ............ .... points

                                                                                                                                            ........................................69                                              l

6. Determination of the amount of usable fuel oil and diesel run time based on the 205 gallon minimum F.O. day tank volume as s in the Tech. Spec. .. .. ........ .................. ..............................................76 .......... .pecified

7. Determination of the volume of F.O. required in the day tank to satisfy

, the ANSI N195-1976 requirement to " Maintain at least 60 minutes of .. . _ . operation at the level where oil is automatically added to the day tank

                      . plus a minim um m argin of 10%" ................. ...................... .............................. 7 7 l

8. Determination of the length of Diesel Generator run time based on the i 490 gallon volume specified in operating procedure OP-3346B .......................... 79 9.wom: A Qpe e Jton bH a,t-oweset &n Nm40M.s m +w a nd. ,ao 2000nt vadous M &cw "l'9'b W k & Cd ' & 41/'

wkuel.s 0-55ml! h< de,}b YC* Conclus.t o#!nsk0

                     . nf(A 4e.... b<.M        spec
                                          .........  ...... ^     foe......./..
                                                              .. ....      pdm ..../..*..Q..

he ..Pa y

                                                                                                                ...................................'.......................80
                                                                                                                                                                                              .        ~-

f l Attac hm ent 1 "The Powe r Han d book," ........................................................................ 2 Pa ges 2nd Edition by the Editors of Power Magazine Copyright 1983, McGraw. Hill, Inc. , Page 36, " Tanks - Figuring Their Capacity." I i Attachment 2 - Engine Data Sheet from Ref. 7 Page 4 4 .............. ................................ 2 Page i Attachment 3 - Viscosity of Fuel Oils Curves from Ref. 34............................................. 2 Page Attachment 4 - Figure 2, " Critical Submergence Dependence........................................ 2 Pago On Fg Number", from Ref. 29

                                                                                                                                                                                                                                    )l Attachment 5 - Pigure 3, " Minimum Submergence Limits............... .... ...... ........... ... 2 Page                                                                                                                         i ForIntakes With Both Symmetrical and                                                                                                                                                                     l Utteral- Approach Flows " from Ref. 30                                                                                                                                                                    l Calculation 9l-019152M3 Rev.O Page 4 of 80

c o u,, , HORTHEAST UTILITIES SERVICE COMPANY h suoncv /dm/ Aliv? of &No 6+'@

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                                                            =

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NORTHEAhl UllLill65 SERVICE COMPANY 0 I go.,,7 u , [f sueitci /d//J/hkAsA c $178r$bt4W ' DY $d b/ //)k u k oATE bl/0/93 7)?ulGi,JaA, hi M>n /Lidts en<o. er %c % o,,, t/ic M

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     . . . =                                                    --

_ _-~ ~ l i l' l MILLSTONE 3 EDG STORAGE TANK I l l Calc. Case 9 \ .====r== n

                           ,:: == = = =:=:::
                         =rr .:r : = = . = ::
                      . = . :. . . . = . .:::=. . .=. . .=. . .=. . .:..

rrrr r==rr==f/r a

                    .=....r..=....=...r..=....r..=.;.      r
                 =...r..r.. 32110 gal. = . . . = .

Full Tank c..r..=... usable 7. 3. .:. ./ 35340 9al. rurr 3.62 days r= / 31449 9al- usGusuGaGuu j n Tank 95%

v. r.- / usable 2 :: ;ttttttttttttt: pull

                =...r. .r..a.. at r.l.                                                                                      //             /

r..=...=... 3.28 days . = . . . = . ./ 3.55 days

                                                                !                                    mumsmmmu littttttttttttttttt:/
                                                                                                                                      .//
                                                                                                                                       /

n 34679 9*I' T h SE ~

                                                                                              // ^"'"""'""""E'
                  ~
               .=r=.
                  .(((({5 at h.r~                     '75E/          at r.L                          5 29530 gal. iE                                                         NOTE 4 70: /
               =:r = =. =:==:r:==
               = ::r= =r==:r;

(

                                                                   /  3.21 f at h.r.

days /

                                                                                            //15 usable
                                                                                            /        1:

21 g:

at '

                                                                                                                                  /s
                                                                                                                                    /

jl/' Tech. Spec Level ( ,,,g 3g,gn g,,

               ====.r=:=r=:                                                                          1. 3.33 days                                   -

wnth

                =rarr. ======                                   7l                                   1: at r.l-          At/> 29180 9al-/j/

r::rrrr irrrrrr=. 22// usab!e ~3 3 5%

                = fr=J.==rt =r 1:3,n2 2

gays atg;/7, 3.29 days /7, instrument 1;at h.r-7.~. =rr.======.

                 ==rr              =rrrrr=.                               -

2% l' L u m u m u uett ,/ a1 r.l- / error [/.98 days

===.r=rr=== tttttttttttttttttttt 2 NOTES

                  ===.rrr====.                                                                       20   tttittttit:10   ::t// at h'r'
                 =r:=:: =::r:r r = r.                                                                Atttttttttttttttttt /

=r:r.=:=r=:rr.

rrrr. Tr=.=::=.

                                                                                                    .Attttttttttttttttttt//s           //
                                                                                                                                       /
                                                                                                    .Atttttttttttttttttt!/
                     =::rr.=:r::r=r:                                                                 Attttttttttttttttttl vr = r. ==r. ==.                                                                2 stttttttttttttttt 7=:::====r::.                                                           #     Attttttttttttttttttt itt;ttttttttttttttt:

W:=._.

r. .:.r. .=. . .=. . .r. .r. . .

                                                                                             //       umummm3m                    fj
                                       \\\\\\\\\\\\\\\\\\\ \\\\ \\ \                                                                                        '            '            w 3230 gal. unusable fuel due to NOTES-pump submergence requirements r.L - rated load - 4986 kW - fuel consumption - 6.16 gpm 1.

2. h.r. - higher rating - 2000hr. - 5335 kW - fuel consumption 6.8 gpm assuming worst case fuel specific gravity cf 0.82

3. higher fuel specific gravity i.e. 0.89 would extend EDG operation time approx.10% 3

4. 95% tank level was established to prevent overflow LA l S. A positive effect of the existing instrumentation which measuras fuel column pressure offsets somewhat a negative effect of the higher volumetric fuel consumption for fuel with lower specific gravity. The EDG Q

g s operating time of 3 days was calculated to be 3.15 days when this effe'ct was considered. The presented h% numbers are therefore the most conservative. %o o  ;,

                                                                                                                                                                                                    "%Ko Calc. No. 91-019-152M3                                        2 N
                                                         .-_%+-       _     mm -__-_-_m         __ _      _____m   _                                                                   __             - _ _ _ _ _ _ _

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                 -En pc.                  Afh ydA.M 6 acapfiq Q P6w h 12$gf          31 5 / gal

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                            -       . =0 ( so,n d/6yn                                                                              ,

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c. ia y,,. , - 6. ([. 0 in:n.

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                                 ^

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                  -(~ ~           a G9 uw'Q Q vd<m e u.cowh'y s

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• C 7 b"

                     ~

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                                            ' / /71/ 1 G.9qm

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

MILLSTONE 3 EDG DAY TANK 42.75* overflow line Calc. Case 9 i

                                                                                                                     ==        ...

n instr. {:.  :..

      /                        /                                                                          error      = = . -=.::n....,..:..
     /   y                                                                            448 cal.,     s,               ..:n...
                                                                                                                               ........,                               y             n 41' High                                                                               /                  ' 550 9al- --             -

Normal instr. .: 90 min. --- r Level

           . Level 327 aal,          error                         ' at r.L tr aIarm                                                                 s/                    _          /............::                                      u I== =: h: 3                                         ^

Instr.

(( : -:9:-:-:{-:-:3. '

W "M  :{ :#~((((-: : {.; 40* i s , error , Pump

                                                                                                   ///////-           .....    . . . . . . . . . . . . n 7                                                                                                                       shut ott   48' n                                                                                    '413 gal.         = . = .=-- =- :.=- .:.=- :- '
                                                                                                                     == =:::::::                                             30.5*                 FuII

,  %' usable ----- ------------

                                                                                  '284 gal % 67 min s                                            (({g:((g:{g                   24*             Lead       493 gal. tank
                                                                                    "#                            [{9:9

• P"*P "

160 gal. at r.l. / h.bf-{ N.. N... n

                                           -,                      usable         s   46 m?

m. N

                                                                                                % 0 min, /j;g,{g- __g- ;g;g,{--{g pump on                                            i 145 gal.    ,  usabl              30 min.       latr.l. % at h.r. /== ==:::::                              {                               372 9al*

usable 26m? nn-at r.l. ' 42 min. % ... -.-..n..- 278 gal. at r.l 23 min. at r.l. s

                                              ;  23 m:m.

27 min. at h.r. [/ at h.r. s [  : : :- ". :{ : i r ~E:E : :-:-:1 21 min. at h.r. f .;.g.; -{g;: : . at h.r. /- -

                                              ,\              _              //\                                  /:-:{--..:EEE
                                                                                                                 //                ::::
                                                                                                                                                       ^

Nxxxxxxxxxxxxxxxxxxxxxxxxxhxxw==cac/ u w n \ u n //////////////// I (////////////V///> == l-7 h mr u u u

                          \
                            \

Y

                                                                                \- 2* pipe stub                                                          \   Unusable volume 18* Low Low Level                    -

8 gal. unusable volume 45.13 gal, talat alarm - 190 gal. 4.5* vortex 9* * ** "*" Tech. Spec. Level - 205 gal. ' tt

                                                                                                                                                                                                    ~n 23' Low Level                                                                                                                                                                                 E NOTES-                                                                                                                                                     *-

alarm - 263 gal. r.l. - rated load - 4986 kW - fuel consumption - 6.16 gpm to ( 1.

2. h.r. - higher rating - 2000hr. - 5335 kW - fuel consumption 6.8 gpm assuming worst case fuel specific gravity of 0.82 [

3. higher fuel specific gravity i.e. 0.89 would extend EDG operation time approx.10% ,

4 Calc. 91-019-152M3

• J '

ff

NORTHEAST UT18JTE!S a-.- 9 l m-m -- NUSCO L ' y J L'4".L'"'."".~"

                                      .    --" --           CALCULATION CHANGE NOTICE
                                                                                                               "^"'

cosw s-oo (CCN) 1 os 5~~ g usecrto cucuranunT Om Om Se Dev O or>a g cucu rm ~o. aemm ~o. c=ce no. c u c u r e - rm .v. 9 l -019 - / 5 2. M % O c o 2. 0%>Owea gcucurmtrra

                .I cie n r, f.co r,on n -f E , c ,, ,,a - D ie se. I ge, a m rn e R un Yi n e c Unilec Va es o Fue.I <9,1 lrn c,, ,, e L c. ved s g ae,m~ca                                                            -

1 G me os o r c. i n n l yacuo~,oac-oe

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e. >, s o r e The- in ; >, i n u m Pue l o il Ve> Ivm c in The- sv e em '

pa e Teot r t.e e secrion a /y.p ( a c.q 9 ,.g ,. ,),. ), je 3 2 7g o ' S a ilo n s. g oescavirm of cmnos a recenc= mrycArm i a se cr a T ro e h ect s e crio n o- s c a l c v i ~ To n Se o ricn I. IO I I B uveuta m etroa G c^" Q"**^ g n ne,w ene.e.oe. D** D *'** 3a, 43 f. 4 3 G- 43 H of e mo.vn amm u m mm o re W :Ili o. ~ c . F o. u c. g aanww vneamm-i t 9/2 Yk C. rn so .- om (/al /13 a re lf3 W YS O J ANf k'I f'1 YW$,:d W.N'f km.) br f e .R s w,l.& $/Nl{l ono .vneamm -, -- o re 3 LX uncM y>*x m2g% b. b s> ) c i:>m

NORTHEAST UTILillE5 SERVICE COMPANY } sa.m wo

 $UBJECT                                             sy @ / d M      OSTEh!N!

CHKD.BY /W DATE / 22! .3 CALC.NO. R E Y.

                                                     $HE E T NO, ) A    OF
                                                                                /9 1   10     DeTe(min 0T>~on           0 h b ef vifFC5 lvevcillance Lc.ve I ro ensure            71chsical S Pe.cificarion          93 f Co m plio. n ce.

USi83 h iQ h [Fecific Crro.v tr3 F u e.L l l I l

NORTHEAST UTILITIES SERVICE COMPANY I g on,, u, SUBJEC7 QY. / M DATE 8/ CHKO.BY b OATE [* b! l CALC.NO. R E Y.

                                                       $HE E T NO. M3                 0F i
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l I.IO D e re r mi nar.c- a f repic <cl su e veilla a ce Le vel To c hte,re Tec h nica l S pe c Scorhu co n p lio <,c e u s, n 9 h.3 h s pacific q ra.vir3 F ue l . A. A SS umPriom s t.T/c. Ta4 s p e c.s rey -ico 22.760 y La o f (vol oi) in ih6 C 3 s TC M. 8s nored in s e ction I.8 3 IS 6-cello e v. sill be is 1'h e. clo ua Tex. n h. As c ac ? Y h c re p irec( G rcrane Toek VoIv>'nc- i; Ea. F60 - E lE = 32 Y YZ e a lic's

2. f vb $ ho'l :( ec IE C O v rn Vu T %1 i: D. 9 s- S cIereenisec{ in ce. c :ric n I. 7-

8. Ca Iculc<r sc ~

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co4m wo NONIHEA51'UiiLITih5 $ERVICE COMrANY a $UBJECT gy Qd( h OaTE [ 3/ k3 CHKO.BY bN DATE 2 k3 C A t.C. N O. R E V.

                                                            $HEET NO.          b           OF

1. // /c c; 4 T Po T/O u

                %                         H to
             - 9/ V9                       0b
            .9180                          A
            .?E3(,                        67
                >( = (.8 7   .8 6)      F.9 tEo   9 l'l 9                 +. g g = . g g3 g
                                        . 4226 .7/Y9                 J

3. R epvice ct H iq k7

                                                          ~

8b? ( / (LC^ = 10 ?. 9 5 DcQ lo8 * )

4. hinimve l e. \/ C l on

                                                $v6 e.

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                                                          ~
               ]O8 ' - 9 "        =. l0 'l C P re :cu re. o r pep f o c to y " f u e. )                                                    ;

lo V y o. 9 = 9 3.g " WL

                                ~                                                                        \

s. cr.

6. /dinim a compun r Poin T reactin3 3 E(rF -L 2CA(s) a.13. g " M c + lz'wc = 7tg * %

w thSTtwe nr C. T (O T

ro4:n wo NORTHEAST UTILITIES SERVICE COMPANY SUGJECV BY DATE CHKO.BY DATE CALC.NO. REV. SHE E T NO. OF

6. b. R epaired  % syn TJ.B " w c = 9 0. 2.7 To Use. 9ac%

                 /05 " w c C o a c.lv slen
           /) s Lo n3 ws FueI o ll in T h e- Ta-nk u a.Le>ve 90.C % 7kch s pec co mplia nce.

W.TA S c c rio n 3/48 r e pvice n3 3 2 No ec4 /. in TA e s zsrem is as s' u r r e c). 1 1

i l} TTa c h u tni 1 TICURE 7.2 . CTP DATA BASE INPUTS

1. NUSCO Calculation Number 9 /~ O / 9 ~ /f d M 3

2. Vendor Calculation Number A/!O

3. Title Icls eTkore>rnou nh E neror> n D ac o l h u m rer h s % e yqler Vac ie:z~

pue.\ o,I' s ro ra

• c. c e. v e.u ~ u

4. latest Revision /Date E \/ O

s. CCup 0 r) 7-

6. Superseded By M

1. Plant N P3 i

8. Building / System / Component Code 0 4 / TE:S ,/ T A/ k

9. Component I.D. BI ? P + T X 1.4 /P  ? Et- n T*tr Z. Al B

10. QA (Y/N) Y

11. Cocrputer Code Used A/

12. P.A.g 7/ O/9

13. Reference Calc. g M/S

14. Reference Drawing M/S

15. Comments NEO 5.06 Rev. 6

 " "8                                                                   Page 7.2 1 of 1

  , ,, e A T r a c,h e r a r 2.

FIGURE 7.5 - i Calculation Checklist a calculation Identifying Number 9 / 4/ 9-if 2143 Revision O

1. Preoaration Initials MMM 1.1 Section 6.1.2 $ /C #,.f--

1.2 Section 6.1.3 1;/ c c-:_. 1.3 Section 6.1.4 (vc e5 - 1.4 Section 6.4.6 7-/c @

2. Verification 2.1 Section 6.2.2.1 /

2.2 Section 6.2.2.2  ;> // 2.3 Section 6.2.2.3 2.4 Section 6.2.2.4

                                                                *>//
                                                                % //                                       fgM'      .
                                                                                                                           /.e g' M'#L) fg 2.5 Section 6.2.2.5                's//                                        s*/

2.6 Section 6.2.2.6 v// r/ 2.7 Section 6.2.2.7 v '/ 2.8 Section 6.2.2.8  % ) 2.9 Section 6.2.2.9 Uw 2.10 Section 6.2.2.10 W/ i 2.11 Section 6.2.2.11 w // 2.12 Section 6.2.2.15 -.v

3. Aeoroval Initial & Date

! j 3.1 Section 6.3.1 CM O. / 3.2 Section 6.3.2 6/ y - , 4 3.3 Section 6.3.3 L2 c / l 3.4 Section 6.3.4 c V U.  ; 3.5 Section 6.3.5 rit t / i 3.6 Section 6.3.6 < 24.s l

                                                                       .y.

4. Non OA Aeolications Initial & Date 1 4.1 Section 5.4 vaived NM 4.2 Section 6.1.4.7 l vaived NA l 4.3 Section 6.2 vaived 9A l i

l Basis for Waiver (s) NEO 5.06 Rev. 6 so4-6.wro Page 7.5-1 of 1 . i 1

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