ML13329A744
| ML13329A744 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 07/31/1991 |
| From: | Rosenblum R SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9107310215 | |
| Download: ML13329A744 (97) | |
Text
ENCLOSURE 1 SONGS 1 RCS Inventory Analysis for Station Blackout Calculation # DC-3601
CA ULATION TITLE PAGE Shoet Engineering System umber Tech Spec Eff ecting E
NO Section No.
N/A Equipment Tag No.
N/A computer STANDARD COMPUTER PROGRAM PROGRAM NO.(S)
VERSION/RELEASE NO.
Program YES NO RETRAN-02 MOD 004 RECORD OF ISSUES SCE TOTAL LAST DISC. or REV.
DESCRIPTION NO. of SHEET ORIG.
NEDO O-A Issued for Comments 59 59 VCA/ "W 7 11 NFM 0
original Issue JFh/
Space for RPE Stamp, reference alternate calc., and notes as applicable.
This calc. was prepared for the identified DCP/MMP. DCP completion and turnover acceptance to be verified by receipt of a memorandum directing DCN Conversion. Upon receipt, this calc. represents the as-built condition. Memo date by SCE 26-121-1 REV 3/90
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CcN No. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
3 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazarith 6/21/91 W. Alhassa 6/21/91 Vv TABLE OF CONTENTS SECTION PAGE I.
PURPOSE......................................
4
- 11.
RESULTS/CONCLUSIONS & RECOMMENDATIONS.......... 5 111.
ASSUMPTIONS..................................
9 IV.
DESIGN INPUT..................................
12 V.
METHODOLOGY................................
16 VI.
REFERENCES...................................
29 VII.
NOMENCLATURE................................
31 VIII.
CALCULATIONS.................................
32 APPENDIX A (LISTING OF RETRAN CODE MODEL)........ 34 APPENDIX B (PRESSURIZER LEVEL PROGRAM).......... 61
NES&L DEPARTMENT CALCULATION SHEET PEUM. CCN NO.
PAGE OF Project or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
CCN No. CCN Weubject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
4 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE
- IRE, DATE R
V. F. Nazar h 6/21/91 W. Alhassanb 6/21/91 E
I.
PURPOSE 10 CFR 50.631 requires that SCE demonstrate the ability of SONGS Unit 1 to cope with a Loss of all AC power (Station Blackout). Regulatory Guide 1.155 provides NRC guidance for addressing this situation2. This guide states that the NUMARC (NUclear Management And Resource Council) published guidelines3 to demonstrate ability to cope with a station blackout (NUMARC 87-00) is compatible with the Reg. Guide. The basic NUMARC/REG. GUIDE criteria are as follows:
(i) procedures and equipment relied upon in station blackout should ensure that satisfactory performance of necessary decay heat removal systems is maintained for the required station blackout coping duration, (ii) the core must be kept covered for the coping duration, and (iii) appropriate containment integrity should be provided in a blackout to the extent that isolation valves perform their intended function without AC power.
The purpose of this calculation is to determine whether adequate RCS water inventory exists to perform the decay heat removal function and keep the core covered during a station blackout for the NUMARC defined coping duration.
NES&L DEPARTMENT CALCULATION SHEET ICCN NO.
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[PREUM. CCN NO.
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Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
5 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazar 6/21/91 W. Alhassa 6/21/91V II.
RESULTS/CONCLUSIONS AND RECOMMENDATIONS A. RESULTS/CONCLUSIONS The significant events occurring during a station blackout including operator actions are shown on Table 11-1. A trend of some of the important parameters during the critical times of the coping duration are shown in Table 11-2.
On initiation of the blackout, the Pressurizer begins to empty rapidly due to the RCS leakage (171 gpm (cold) for the first 2 minutes and 101 gpm (cold) thereafter) and coolant shrinkage. In 21 minutes the pressurizer has emptied. Thereafter, the Reactor vessel upper head begins to drain resulting in a steam bubble in the upper head of the vessel. In 45 minutes the vessel upper head is completely voided. The outlet plenum then begins to drain causing the steam bubble to expand into the outlet plenum. The mixture level in the outlet plenum drops to just above the top of the hot leg at the end of one hour. During this one hour period natural circulation removes the core decay heat and keeps the core covered.
At one hour after the initiation of the blackout the charging pumps when powered by the DSD will provide makeup flow to the RCS. Thereafter the RCS inventory will be maintained (or will increase) for the remaining three hours of the coping duration. Again the core decay heat continues to be removed and the core remains covered for this period.
B. RECOMMENDATIONS
- 1. The Technical Specification leakage allowance of 6 gpm (total identified &
unidentified) remains valid for Station Blackout. No changes to the Technical Specifications are thus required.
- 2. The allowable letdown isolation valve leakage of 20 gpm remains acceptable.,
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roject or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
CcN NO. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
6 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazare h 6/21/91 W. Alhassan 6/21/91 E
V TABLE II-1 SEQUENCE OF MAJOR EVENTS FOR STATION BLACKOUT TIME (MINUTES)
EVENTACTION 0
Loss of all on and offsite AC power accompanied by reactor and turbine trip 3
Operator takes manual control of ADV's 4.7 Auxiliary Feedwater Flow injected into the S.G.'s through turbine driven pump (G-10) to achieve and maintain S.G. level between 50% and 70% NR.
20.8 Pressurizer empty; Voiding begins in the upper Reactor head 45 Upper Reactor head completely voided; Voiding begins in the outlet plenum 60 Outlet plenum* approximately 40% voided; No voiding in the hot legs 60.1 RCS charging restored through powering north charging pump by the DSD diesel generator; RCS inventory reduction stops 240 End of coping duration Outlet plenum extends from the reactor head flange to the top of the core
NES&L DEPARTMENT ICCN NO.!
CALCULATION SHEET UM._C PRELIM. CCN NO.,AEO_
PAEIF l jct or DCP/MMP ___________
Cac. No. DC - 3601 CCN CONVERSION:
Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
-7 REV ORIGINATOR DATE' IRE jDATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazae 6/21/91 W. Ahassai6/
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PRELIM. CCN NO.
PAGE-OF.
roject or DCP/MMP Calc. No. DC - 3601 CON CONVERSION:
cN NO. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
9 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazah 6/21/91 W. Alhassai, 6/21/91 E
Ill.
ASSUMPTIONS A) NUMARC2 BASED
- 1. The reactor is operating at 100% power for 100 days and at normal operating conditions at the time of the blackout.
- 2. All reactor support systems are within normal operating ranges.
- 3. The blackout does not occur during a design basis event.
- 4. Single failure criteria are not considered since SBO is not considered a design basis event.
- 5. The RCS pump seal leakage (cold) will not be greater than 25 gpm/pump.
- 6. The coping duration Is four (4) hours.
- 7. The initiating event is a loss of offsite power.
B) OPERATIONS BASED
- 1. The Nominal pressurizer level at 100% power is 37.5%.
This is the expected Pressurizer level at 551.5 F (i.e. based on the reduced Tavg program - see assumption B.2)2 (confirmed by E-mail from Operations -- see Appendix B).
NUMARC permits use of the nominal pressurizer level as the initial condition of the blackout (see assumption A.1 & A.2).
- 2. The plant is using a Reduced Tavg program (due to the steam generator tube corrosion and plugging)".
- 3. The total unidentified and identified leakage is less than 6 gpm (requirement from Section 3.1.4 of the tech. specs.7).
C) E014.5 BASED
- 1. Steam generator level will be maintained between 50% and 70% NR during the blackout.
NES&L DEPARTMENT CALCULATION SHEET CCN NO.
,roject br DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
ccN NO. CCN ubject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No. 10 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazarptp 6/21/91 W. Alhasai 6/21/91
- 2. Auxiliary feedwater flow will be provided to the steam generators to maintain the steam generator level between the above limits.
Auxiliary feedwater flow is provided through the turbine driven pump (G-1 0). The operator can throttle flow to the steam generators to maintain the Steam generators within these limits' 4.
- 3. The DSD can be powered up to restore charging capacity within one hour after the initiation of the blackout6.
- 4. The number of steam generator tubes plugged will be less than 20%2. The safety analysis for Unit 1 cycle 11 assumes S.G. tube plugging of 20%. Therefore this assumption is used here.
- 5. The atmospheric dump valves are placed in manual mode to maintain plant subcooling conditions 3 minutes after initiation of the event. This is an expected operator action. However, this assumption will not compromise the conservatism of this calculation. If the manual operation of the ADV's were not credited, decay heat removal will still occur through automatic control of the ADV's and also through the Main Steam Safety Valves (MSSV).
- 6. The letdown leakage for the first two minutes after the blackout will be less than 90 gpm (i.e. 70 gpm greater than the leakage after blackout initiation). The 90 gpm value is the normal maximum letdown leakage (Section 9.3.4 of Reference 10). The letdown valve closure time is expected to be less than 30 seconds.
Therefore the assumption of a 90 gpm letdown leakage for 2 minutes since the initiation of the SBO is conservative.
- 7. The total letdown system leakage (cold) after the first two minutes is less than 20 gpm. This is the maximum expected leakage from the letdown orifice isolation valves after the letdown system is isolated 8.
- 8. Control rods are fully inserted within 3 seconds after initiation of the blackout 2.
- 9. No other leakage resulting in RCS water inventory drain exists.
- 10. The reactor trip is caused by the instantaneous loss of all AC. This produces the
NES&L DEPARTMENT CALCULATION SHEET ICCN o.
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I PREUM. CCN NO.PG OF5 Project or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
CCN No. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
11 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V.
F NazArh
/2191 W Alhss%
6/21/91E loss of the turbine bypass system which causes the initial opening of the ADV's.
The ADV's are air operated and have Nitrogen backup. Therefore they will continue to be operable during a blackout.
- 11. Control room adequacy and battery are assured to function during the entire coping duration 9.
- 12.
The minimum Auxiliary Feedwater flow delivered to all three steam generators at a secondary side pressure of approximately 923 psia, when driven by pump G-10 will be at least 270 gpm.
The actual minimum deliverable flow is expected to be between 288 gpm and 300 gpm.
Therefore, it is conservative to assume a minimum deliverable flow of 270 gpm.
NES&L DEPARTMENT CALCULATION SHEET UMCo.
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ccN No. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
12 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
IV. F. Naz r th 6/21/91 W. Alhass 6/21/91 IV.
DESIGN INPUT Table IV-1 shows the design inputs used to determine the RCS inventory during the station blackout. The auxiliary feedwater flow that will be automatically delivered to each S.G. by means of the steam driven auxiliary feedwater pump (G10) is shown in Table IV-2. Some of the significant external inputs that require further explanation are described as follows:
(i)
RCS Leakaqe -- NUMARC 87-00 suggests using the assumption of leakage rates of 25 gpm per pump seal (i.e. total seal leakage of 75 gpm). The Unit 1 technical specification 3.1.4 permits a maximum allowable unidentified and identified leakage of 6 gpm. The letdown leakage limit is assumed to be 90 gpm until the letdown isolation valves are closed (i.e. for the first 2 minutes of the blackout) and subsequently 20 gpm for the remaining duration of the transient. Therefore the total leakage assumed is 171 qpm for the first 2 minutes of the blackout and 101 gpm for the rest of the coping duration. On a loss of all ac power, the letdown system is automatically isolated. This occurs by closure of valves CV-202, CV-203
& CV-204 along with CV-525 and CV-526 (See note in letdown system drawing 21).
The closure time for the letdown isolation valves is less than 30 seconds.
For conservatism the closure time of 2 minutes is used in this calculation.
(ii)
Auxiliary Feedwater -- After initiation of the blackout, main feedwater is not available as a decay heat removal system; Auxiliary feedwater however is available since it is driven by the steam driven auxiliary feedwater pump (G-1 0). AFW flow is automatically initiated when the SG level reaches a setpoint value of 5% NR (Table 5.5-3 of Reference 10). It is then assumed that the delay time for the pump to be available to deliver flow into the S.G.'s is 3 minutes (Section 6.5.2.2.3 of Reference 10). Thereafter once the S.G. level has reached between 50% and 70%
NR, the operator manually throttles the AFW flow to maintain this level in the
NES&L DEPARTMENT CALCULATION SHEET oCN NO.
TPAGE OF PREUM. CON NO.PAEO jj oject br DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
ccN NO. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
13 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazarh 6/21/91 W. Alhasani 6/21/91 S.G.'s 4. The philosophy employed here is to maintain temperature and Pressure control in the Secondary side and consequently in the primary side and thus continue to have this system available for decay heat removal.
(iii)
Charging Flow -- After one hour the charging pump when powered by the DSD restores charging flow to the Reactor. From Table 11-2, the RCS pressure at this time will be 1067 psia. The charging flow capable of being delivered at this pressure will be at least 198.5 gpmg. However for this calculation a conservative value of 150 gpm charging flow is used'. This minimum charging flow will be maintained from 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> to the end of the coping duration (i.e. 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />).
- Note that in this analysis it is only important that the charging flow delivered be greater than 101 gpm so that the RCS water that is lost due to the leakage can be made up.
NES&L DEPARTMENT CALCULATION SHEET oUM CNo.
PREUM. CCN NO.
fPAGE OF oject or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
N NO. CCN ubje SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
14 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazar?
6/21/91 W. Alhassani 6/21/91 V
TABLE IV-1 DESIGN INPUT FOR STATION BLACKOUT A. INITIAL CONDITIONS PARAMETER VALUE REFERENCE COMMENTS
- 1. Core Power 1347 MW 10 100% Rated Power
- 2. Core Average Temp.
551.5 F 11 At 100% power
- 3. RCS Pressure 2100 psia 10
- 4. Pressurizer level 37.5%
Nominal level
- 5. S.G. Pressure 547 psia 11 at 100% power
- 6. S.G. Mass 43,000 lbm 17 per S.G.
- 7. S.G. Tubes plugged 20%
11,20
- 8. S.G. Level 30% NR Nominal
- 9. Vessel Flow Rate 195,000 gpm 10,20
- 10.
Vessel mass flow 73*106 lb/h 10
- 11.
Core mass flow 69.7*106 lb/h 10
- 12.
Core bypass flow 4.5%
10
- 13.
Heat generated in Fuel 97.4%
10
- 14.
No load Ref. Temp.
535 F 11 B. AFTER BLACKOUT INITIATION PARAMETER VALUE REFERENCE COMMENTS
- 1. RCS leakage for initial 2 min.
171 gpm see Section IV discussion
- 2. RCS Leakage after initial 2 min.
101 gpm see Section IV discussion
- 3. S.G. NR Level 50%-70%
4 Manually maintained
- 4. Auxiliary Feedwater Auto. initiation 5% NR 10 see Section IV discussion
- 5. Aux. Feedwater Auto initiation delay 3 min.
10 see Section IV discussion
- 6. ADV manual initiation time delay 3 min.
4,5 Assumption
- 7. ADV relief Capacity 1.468x106 12 1bm/hr
- 8. RCP flywheel inertia 45,000 12 1bm/ft2
- 9. Charging Initiation 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> See Section IV discussion
- 10.
Charging flow 150 gpm See Section IV discussion
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V. F. Nazar~o 6/21/91 W. Alh2; 6/21 /91 TABLE IV-2 AUXILIARY FEEDWATER FLOW FOR STATION BLACKOUT16 PUMP DISCHARGE PRESSURE AFW FLOW (Psia)
(Gpm) 0.0 123.3 995.0 123.3 1030.0 115.0 1055.0 108.3 1125.0 88.3 1155.0 64.3 1185.0 50.0 1240.0 33.3 The AFW flow shown in this table was derived from Figure 2-1 of Reference 16 and used in the RETRAN case.
However, the actual flow expected to be delivered to each S.G. through the steam driven AFW pump G-10 will be at least 90 gpm. This will not significantly affect the results of this calculation since reduced AFW flow has a negligible effect on RCS water inventory change and the reduced flow remains sufficient to meet decay heat removal requirements. The lower initial AFW flow will slightly delay the recovery of S.G. secondary side level relative to the RETRAN results.
- However, once the S.G.
level has reached 50% NR, the operator will throttle the AFW flow to maintain S.G.
level.
The secondary side results will then be consistent with the RETRAN values.
For these reasons the lower AFW flow will not impact the RCS water inventory level nor will it significantly impact the ability of the system: to remove core decay heat. AFW flows used are best estimate values and should not be considered design basis values.
NES&L DEPARTMENT ICCN NO./
CALCULATION SHEET PEUM Co.
PREUM. CON NO.
PAGE OF roject 'or DCP/MMP Calc. No. DC - 3601 CcN CONVERSION:
CCN NO. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
16 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazarl 6/21/91 W. Alhassai 6/21/91 E
V.
METHODOLOGY A. GENERAL The RCS Inventory Analysis is performed based on the expected operator actions during a blackout as enumerated in EOI S01-1.0-60 and the expected Plant responses described in the Background Document for this EOls. The simulation of the blackout and consequent plant actions and response is modeled using the RETRAN computer code.
The results of the computer code will then be verified by a simplified hand calculation.
B. RETRAN CODE MODEL The basic RETRAN model for Station Blackout was developed for the analysis performed to demonstrate the adequacy of the leakage technical specification (T.S. 3.1.4) and in response to LER 90-00418. A complete description of the input model used for this LER analysis is documented in Reference 12. The RETRAN nodal diagram describing the control volumes and junctions used in this analysis is shown in figure V-1.
The code control systems for auxiliary feedwater flow and steam bypass are described in Figures V-2 and V-3.
The modifications made to the basic model12 for this analysis are shown on Table V-1. The primary modifications along with the reasons for the changes are described as follows:
- 1.
RCS Leakage -- The base model had the total RCS leakage only from one loop (i.e. volume 18). This approach is acceptable until such a time as the Pressurizer is drained.
Thereafter the imbalance in the leakage appears to affect the convergence of the code. Therefore, a new junction (junction 51) was added for leakage from the other loops (i.e. volume 36). The amount of leakage through junction 50 will thus be reduced to one third of the total leakage and through junction 51 will be two thirds of the total leakage (since loops A & C are modeled
NES&L DEPARTMENT CALCULATION SHEET PREUM. CCN NO.
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17 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazare 6/21/91 W. Alhassani 6/21/91 together as one loop).
The HOT leakage is determined as follows:
Lhot = Lcold * (dcolddhot)
- where, Lhot= Hot leakage (gpm)
Lcold = Cold leakage (gpm) dhot = density of water at 535 F
= 47.7 Ibm/ft3 dcoid =.density of water at 80 F
= 62.6 Ibm/ft3 The HOT leakage per RCS loop thus becomes 74.67 gpm (171*1.31/3) for the first 2 minutes of the SBO and 44.1 gpm (101*1.31/3) thereafter for the coping duration of 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
- 2.
Charging -- The base model does not account for charging flow into the RCS system one hour after the SBO initiation. Therefore two extra junctions were added to provide this function (junctions 48 and 49). The amount of charging through these junctions will be one third through junction 48 and two thirds through junction 49. The hot charging flow per RCS loop will thus be 65.5 gpm (150*1.31/3) to be initiated one hour after the initiation of the SBO for the remaining 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> of the coping duration. In addition a charging initialization card was included to permit the initiation of charging flow.
- 3.
RCS Flow Rates & Temperatures -- The base model flow rates were recalculated here based on the values from Table 4.4-1 of the FSAR10. Table V-2 shows the vessel flow rate, core flow rate and the calculation of the vessel inlet and outlet temperatures with the caveat that the Tavg will be maintained at 551.5 F (i.e. the Reduced Tavg program).
- 4.
Bubble Rise Models -- The base model was developed for a RCS leakage of only 27 gpm. The criteria used was Pressurizer drain. Since the criteria here is core
NES&L DEPARTMENT CALCULATION SHEET ICCN NO.
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ccN No. CCN S
ubject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
18 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazaret 6/21/91 W. Alhassani 6/21/91 E
uncovery and the outlet plenum and upper head drain, a bubble rise model is included for the outlet plenum volume 6 (a bubble model in the upper head was in the original model). The model parameters are the same as for the upper head.
(i.e. Volume 7).
- 5.
Volume overlaps -- Due to the occurrence of bubbles in Volumes 6 & 7, RETRAN was not converging at the time that volume 7 was drained. Therefore, the volume height of volume 6 was adjusted to 9.6 inches to produce an overlap of 0.1 inches (old value was 9.5 inches). For the same reason the volume height of volumes 11, 16, 29 & 34 were also adjusted to 8.605 inches to produce an overlap of 0.1 inches (old value was 8.505 inches).
- 6.
Steam Generator Adjustments -- The mass of water in the secondary side of each S.G. is 43,000 Ibm. However, the code model is set up to accept only volumes.
Therefore, the volume of the S.G.'s are adjusted to result in this S.G. water mass (i.e. Volume 50 = 1395, Volume 60 = 2906). In addition the initial S.G. liquid level and gain are adjusted to 22.2938 and 0.1044 to obtain an initial S.G. liquid level of 30% NR.
- 7.
AFW control block -- The automatic AFW flow injection is modeled to inject water into the S.G.'s when the S.G. low level reaches 5% NR with a time delay of 3 minutes to account for valve stroking, transit time and time for the pump to get to full speed. The base model erroneously set the trip function for AFW initiation. on a parameter for ADV control. This error was conservative in Reference 12 since the AFW would be actuated later than if it was correct. However, for this analysis this error is corrected (Card # 040030).
- 8.
Time step -- In order to reduce the unnecessary time steps and consequently the code execution time, the time steps after the first hour of the transient are changed from 0.05 sec to 0.10 sec..
This will not compromise any of the results or conclusions of the code.
NES&L DEPARTMENT CALCULATION SHEET UM ICP Project or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
'CCN NO. CCN ubject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
19 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazaret 6/21/91 W. Alhassa i 6/21/91 E
- 9.
Problem Run Time --
The NUMARC guideline coping duration is 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
However, the charging flow powered by the DSD diesel is restored after one hour.
Therefore, the simulation need be performed only for one hour. This simulation is performed for 30 minutes more (i.e. 90 minutes) to simulate some of the recovery process once the charging is restored.
NES&L DEPARTMENT CALCULATION SHEET IooNUo.P PREUM. CCN NO.
GE_ OF_
oject or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
CCN No. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
20 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. NazaretP 6/21/91 W. Alha 6/21/91 TABLE V-1 LIST OF MODIFICATIONS TO BASIC SBO MODEL No. Card #
Parameter Modified value Base Value Purpose
- 1. 010001 No. of minor
-54
-40 More detail output edits printed
- 2. 010001 No. of trip 20 19 Additional trip for functions charging actuation
- 3. 010001 Number of bubble 10 9
Addition of set for Sets outlet plenum vol 6
- 4. 010001 Number of junctions 51 48 Addition of junctions for second leakage path and charging(2)
- 5. 010002 Number of fill 14 13 Addition of fill tables table for charging
- 6. 02000x Minor Edits Printing more output variables
- 7. 0300x0 Edit frequency Changes in output edit print frequency
- 8. 030060 Time steps
.10
.05 less frequent time steps after 1 hr.
- 9. 040010 Problem run time 4800 7200 Running problem for 1.5 hrs.
- 10.
040030 Control block
-20
-13 Correction of AFW error
- 11.
040200 Charging trip New charging initialization card
- 12. 050011 Vessel inlet temp.
527 528 corrected value
- 13.
050061 Bubble set 10 Assigning new bubble model set for vol 6
NES&L DEPARTMENT CALCULATION SHEET EICCN CN NO.
PAGE OF roject or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
CCN NO. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
21 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
E V. F. Nazare 6/21/91 W. Alhassani 6/21/91 A No. Card #
Parameter Modified value Base Value Purpose
- 14.
050061 Volume 6 height 9.6 9.5 Changed to get.1" vol 6/7 overlap
- 15.
050071 Vessel outlet temp. 576 575 corrected value
- 16.
050111 Volume 11 height 8.605 8.505 Increased to get 0.1 in. vol 11/12 overlap
- 17.
050161 Volume 16 height 8.605 8.505 Increased to get 0.1 in.
vol 15/16 overlap
- 18. 050291 Volume 29 height 8.605 8.505 Increased to get 0.1 in.
vol 29/30 overlap
- 19. 050341 Volume 34 height 8.605 8.505 Increased to get 0.1 in. vol 33/34 overlap
- 20. 050501 S.G. "B" Volume 1395 1310 water vol. adjusted to 43,000 lbm
- 21. 050601 S.G. "A+C" volume 2906 2620 Watervol. adjusted to 86,000 lb.
- 22. 060101 Bubble set Bubble rise model for vol 6 same as vol 7
- 23. 080011 Junction 1 19,361 20,583 Corrected core flow rate flow rate
- 24. 080081 Junction 8 6,759 7,110 Corrected Loop "B" flow rate flow rate
- 25. 080091 Junction 9 6,759 7,110 Corrected Loop "B" flow rate flow rate
- 26. 080211 Junction 21 20,278 21,330 Corrected vessel flow rate flow rate
- 27. 080311 Junction 31 13,519 14,220 Corrected Loop "A+C" flow rate flow rate
- 28. 080511 Junction 51 36 New RCS leakage path from volume 36
NES&L DEPARTMENT CALCULATION SHEET PEUMCCN NO.
PAGE OF oject'or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
22 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazaret 6/21/91 W. Alhasn 6/21/91v No. Card #
Parameter Modified value Base Value Purpose
- 29. 080511 Junction 51 2.0 Area doubled to double leakage
- 30. 080512 Junction 51 continuation card for new junction 51
- 31.
131301 RCS leakage
-74.67
-35.4 total leakage per RCS loop for first 2 min
- 32. 131302 RCS leakage
-74.67
-35.4 total leakage per RCS loop for first 2 min
- 33. 131303 RCS leakage
-44.1
-35.4 total leakage per RCS loop after 2 min
- 34.
131304 RCS leakage
-44.1
-35.4 total leakage per RCS loop after 2 min
- 35.
131401 Charging flow 0.0 No charging flow at initiation of SBO
- 36.
131402 Charging flow 0.0 No charging flow for one hour of SBO
- 37.
131403 Charging flow 65.5 Charging flow after one hour
- 38. 131404 Charging flow 65.5 Chargingflowafter one hour
- 39. 702003 RCS Flow Rate 4.93*10-5 4.69*10-5 Adjust initial gain (1/vessel flow)
- 40. 702007 Vessel outlet temp. 576.0 575.01 Corrected value
- 41.
702008 Vessel inlet 527.0 528.02 Corrected value temperature
- 42. 702009 S.G. Liquid level 22.2938 22.3838 Adjusted to match steady state value
- 43.
703020 S.G. Level Gain 0.1044 0.1012 Adjusted to get initial 30% NR
NES&L DEPARTMENT CALCULATION SHEET CCN NO.
TPAGE OF Projector DCP/MMP Calc. No. *DC - 3601 CCN CONVERSION:,
ccN NO.CCN Object SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
23 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
A E
V. F. Nazareg 6/21/91 W. Alhass2 6/21/91 TABLE V-2 CALCULATION OF RCS FLOWS AND TEMPERATURES The basic equation to calculate heat transfer in the core is:
DHe Q / Mc.....................
Equation 5.1
- where, DHC
= Enthalpy Rise in the Core Q = Heat generated in core
= (4.596
- 10')
- 0.974 = 4.477
- 109 Btu/hr (Reference 10*)
Mc = Core mass flow rate
= 69.7
- 106 ibm/hr.
(Reference 10*)
Therefore substituting in Equation 5.1, DHe
= 64.2 Btu/lbm The enthalpy changes in the core can be stated as:
havg = (how + hi) / 2.0.
Equation 5.2 and DHC
= hoc -
hin Equation 5.3
- where, hayg = average enthalpy in the core
= h(P=2100 psia, T =551.5 F) (This is an approximation)
= 549.3 Btu/lbm (from steam tables) hov = Vessel outlet enthalpy hin = Vessel inlet enthalpy hoc = Core outlet enthalpy Therefore combining equations 5.2 and 5.3 and substituting for known quantities, hav + hoc = (2
- 549.3) + 64.2
= 1162.8
................. Equation 5.4
NES&L DEPARTMENT CALCULATION SHEET CCEUMN NO PAGE OF Project or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
CCN NO. CCN ubject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
24 REV ORIGINATOR DATE IRE DAREV EV ORIGINATOR DATE IRE DATE R
V. F. Nazare 6/21/91 W. Alha n 6/21/91 From Reference 10* the difference between the vessel temperature rise and the core temperature rise at full power is 2 F (i.e. 49.3 - 47.3)
Therefore, assuming that the core exit temperature and the vessel exit temperature are between 570 and 580 F and interpolating from the steam tables for a pressure of 2100 psia, hav - hoc = -2.6.
Equation 5.5 Combining Equations 5.4 and 5.5 results in, hOV 1160.2/2
= 580.1 Therefore, Tov= Vessel outlet Temperature
= T (P=2100 psia, hav=580.1 Btu/lbm)
575.4 F Substituting in Equation 5.2, hi
(2
- 549.3)
- 580.1
= 518.5 Therefore, Ti= Vessel inlet temperature
= T(P=2100 psia, hi,,=518.5 Btu/1bm)
= 526.4 F Subsequently, Calculated Tyg = (575.4 + 526.4) / 2.0
= 550.9 F Since the actual Tavg = 551.5 F, the values of Tin and To, are adjusted by +0.6 F.
Therefore the values input into RETRAN are as follows:
Ti
= 527 F TOV 576 F hin = h(p=2100 psia, T=527 F)
= 519.3 Btu/lbm
NES&L DEPARTMENT CALCULATION SHEET ICON NO.
O PRELIM. CON NO.PAEO Projector DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
cCN No. CCN W bect SONGS I RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
25 REV ORIlNATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazare 6/21/91 W. Alhassani 6/21/91 hav = h(p=2100 psia, T=576 F)
= 580.8 Btu/lbm MC= Core mass flow rate
= (69.7
- 106 lbm/hr) / (3600 Sec/hr)
= 19,361 ibm/sec M = Vessel mass flow rate
= (73
- 106 lbm/hr) / (3600 Sec/hr).
(Reference 10*)
= 20,278 lbm/sec
= 6,759 ibm/sec per RCS loop
- from Table 4.4-1
NES&L DEPARTMENT CALCULATION SHEET RCCN NO.E PREUM. CCN NO.
[PAGE OF roject or DCP/MMP Caic. No. DC - 3601 CCN CONVERSION:
CCN NO. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
26 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazaret i1 6/21/91 W. Alhass 6/21/91 V
O c6 O<
I11 0
z--4 0
>z Ur sil
NES&L DEPARTMENT CALCULATION SHEET CCN NO.
PAGE OF voject or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
I CCN NO. CCN -
Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
27 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazaret&
6/21/91 W. Alhas 6/21/91 dd 0)0 Q.
C C
-- )
LO 0.00 a 3 0*
s e
e z=
s0!
NES&L DEPARTMENT ICCN NO.I CALCULATION SHEET, PREUM. CCN NO.
PAGE OF Project~or DCP/MMP___________ Caic. No. DC - 3601 jCN CONVERSiON:
- a.
CCN NO. CCN ubject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
28 FREV OIINATOR DATE IRE DATE REV ORIGI NATOR DATE IRE DATE R
0 41]
00 0
CL a.a2
- 0) u 0*
L V)
-0 rL L
vi e
3t U--)
cC4 C-u
NES&L DEPARTMENT CALCULATION SHEET ICCN NO.!
PREUM. CCN NO.
PAGE_
OF oect or DCP/MMP Calc. No. DC - 3601 CON CONVERSION:
CcN NO. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
29 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazare 6/21/91 W. Alhassani 6/21/91 E
VI.
REFERENCES
- 1.
Code of Federal Regulations, 1 OCFR5O.6 3.
- 2.
NUREG 1.155, "Station Blackout', August 1988.
- 3.
NUMARC 87-00, "Guidelines and Technical Bases for NUMARC initiatives addressing Station, Blackout at Light Water Reactors", November 1987.
- 4.
EOI S01-1.0-60, Rev. 9, "Loss of all AC power', February 13, 1991.
- 5.
EQI S01 -1.0-60. 1, Rev. 2, "Background Document for Loss of all AC power', April 10, 1990.
6.-
Letter for M.O. Medford (SCE) to NRC "Docket Nos. 50-206, 50-361, 50-362; Response to 10 CFR 50.63, Loss of all alternating current power; San Onofre Nuclear Generating Station Units 1, 2 and 3", April 17, 1989.
- 7.
SONGS Unit 1 Technical Specifications, Amendment 143.
- 8.
MMP 1 -3645.005N, Revision 0.(See sheet 437).
- 9.
DC-3460, "CRS and Charging System Performance", P. Biba, January 9, 1991 (Attachment 46)
- 10.
SONGS Unit 1 Updated Final Safety Analysis Report (UFSAR)
- 11.
PFC # 1-89-003, "Unit 1 Cycle 10 Core Reload", January 23, 1989 (Attachment J).
- 12.
DC-3533, "SONGS 1 RICS Leakage During Station Blackout', Y.P.ling, March 8, 1991.
- 13.
Intentionally Blank
- 14.
Songs Unit 1 drawing 5178220-16.
- 15.
Crane Reference Manual "Flow of Fluids through valves, fittings and pipe", 1981 (See chapter 1)
- 16.
DC-2836, Supplement B, "AFW Flow Venturi Sizing", May 21, 1990.
- 17.
Letter from H.C. Calton (Westinghouse) to L.K. Carlisle (SCE),"Southern California Edison Company, San Onofre Nuclear Generating Station Unit 1, Main Steamline
NES&L DEPARTMENT CALCULATION SHEET ICCNNOC NO.
PAGE Project or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
CCN NO. CCN 4kubject SONGS I RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
30 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
E V. F. Nazareth 6/21/91 W. Alha 6/21/91V Break M & E Releases for SONGS-1", NS-OPS-OPL-1-90-613, October 26, 1990.
- 18.
LER 90-004, "Potential for Reactor System Leakage greater than Technical Specification Basis, San Onofre Nuclear Generating Station, Unit 1", April 25, 1990.
- 19.
Letter from F.R. Nandy (SCE) to NRC, "Supplemental Response to 10CFR 50.63, Loss of All Alternating Current Power, Station Blackout (TAC No. 68599/600), San Onofre Nuclear Generating Station Units 1,2 and 3", May 1, 1990.
- 20.
Letter from M.F. Muenks (Westinghouse) to P.D. Myers(SCE), "Southern California Edison San Onofre Unit No. 1 Cycle 11 Reload Safety Evaluation Report', 90SC-G 0025, 9/26/90.
- 21.
Songs Unit 1 drawing 5178130-13.
- 22.
SONGS Unit 1 Systems Descriptions, SD-S01-280-3-3, Revision 2 (See Figure 3).
NES&L DEPARTMENT CALCULATION SHEET ICCN NO PREUM. CON NO.
PAGE_
OF roject or DCP/MMP Caic. No. DC - 3601 CCN CONVERSION:
I CCN NO. CCN -
Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT She No.
31 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazaret 6/21/91 W. Alhasn 6/21/91E V11.
NOMENCLATURE ADV Atmospheric dump Valve AFW Auxiliary Feedwater Flow AOV Air Operated Valves DSD Dedicated Shutdown Diesel EOI Emergency Operating Instruction LER Licensing Event Report MOV Motor Operated Valves NR Narrow Range (SG level)
NRC Nuclear Regulatory commission NUMARC Nuclear Management and Resource Council RCP Reactor Coolant Pump RCS Reactor Coolant System RV Reactor Vessel SBO Station Blackout SG Steam Generator
NES&L DEPARTMENT CALCULATION SHEET IoCN NO.
.PAGE OF PRELIM. CCN NO.PAEO roject or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
CCN NO. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
32 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V..
azre 6/21/91 W. Alha 6/21/91 VIII.
CALCULATIONS A. HAND VERIFICATION In order to verify the accuracy of the RETRAN code results a simplified hand calculation will be performed. The purpose of this calculation is strictly to verify that the results are in the realm of reasonableness. The RCS inventory calculated during the station blackout is described in Table VIII-1. As shown on this Table the results of the hand verification calculation compare quite favorably with the results of RETRAN.
Therefore it is concluded that the RETRAN results are acceptable.
NES&L DEPARTMENT CALCULATION SHEET I= CCo./
PREUM.CCNNOPAGEOF roject or DCP/MMP Calc. No. DC - 3601 CcN CONVERSION:
CcN NO. CCN Subject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
33 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazarith 6/21/91 W. Alhassani 6/21/91 E
V TABLE VIII-1 VERIFICATION OF RCS INVENTORY BY HAND ESTIMATE RETRAN CONTROL RETRAN LIQUID LEAKAGEb DRAIN TIME (min.)d DRAIN VOLUME VOLUME MASSa TIMEe NO.
NAME NO.
1bm INITIALc REGULAR CONTROL CUMULATIVE min.
lb/sec lb/sec VOLUME SYSTEM
- 1. Pressur 25 18,447 24.2 14.2 20.2 20.2 20.8
-izer
- 2.
Surge 26 927 0
14.0 1.1 21.3 22.0 Line
- 3.
R.V.
7 17,261 0
13.9 20.7 42.0 45.0 Upper head
- 4.
R.V.
6 13,105 0
13.9 15.8 57.8 60.0 Outlet Plenum (a) from RETRAN model at steady state (i.e. at time = 0)
(b) from Table 11-2 (c) for first 2 minutes of SB0 only (d) t = {[M -
(Li
- c
- k)] / (L,
- k))
+ c
- where, t = Drain time (minutes)
M = Liquid mass L Initial leakage Rate (i.e. for first 2 minutes of SBO)
Lr= Regular leakage Rate (i.e. after first 2 minutes of SBO) k =conversion constant from seconds to minutes (i.e. 60.0) c = initial leakage time in minutes (i.e. 2.0 if initial leakage is greater than 0 or 0.0 otherwise)
(e) from Table II-1 (f) ONLY UNTIL TOP OF HOT LEG (i.e. 39.7% of outlet plenum)
NES&L DEPARTMENT CALCULATION SHEET PEMNNO.
Project or DCP/MMP Calc. No. DC - 3601 CCN CONVERSION:
CcN NO. CCN ubject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
34 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
V. F. Nazar 6/21/91 W. Alhas ni 6/21/91 APPENDIX A LISTING OF RETRAN CODE MODEL
NES&L DEPARTMENT CALCULATION SHEET IPREUM.
CCN NO.
PAGE OF Projector DCP/MMP___________
Caic. No. DC - 3601 CON CONVERSION:
CCN NO. CCN -.
ubject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Shee No.
35 REV ORIGNATRet DATE IRE DAT RE RGNATOR DATE IRE DATER V.RF.INazrTj 6/21/91 W. Alhassani 6/21/91 R
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NES&L DEPARTMENT______________
CALCULATION SHEET lCCNN NO I PAG Prolegt or DCP/MMP___________ Caic. No. DC - 3601 CCN CONVERSION:
16 I
ICCN No. CCN Wubject SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Shee No.
36 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE R
j jV. F. Nazarea~
6/21/91 W. Alhassani, 6/21/91 E
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NES&L DEPARTMENT CACLTO HE ICCN NO./
CACUATONSHETPREUM. CCN NO.
PAGE OF Project or DCP/MMP___________ Caic. No. DC - 3601 CCN CONVERSION:
CN No. CON Wiect SONGS 1 RCS INVENTORY ANALYSIS FOR STATION BLACKOUT Sheet No.
37 0~
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APPENDIX B PRESSURIZER PROGRAM LEVEL
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[205] From: JOHN CUSTER at WEST3 6/20/91 1:41PM (859 bytes: 14 In)
To: MIKE MCDEVITT at NESL3
Subject:
Pressurizer Program level Message Contents ----------------------
Mike Although Pressurizer program level is not specifically addressed in Operations procedures, this information is common operator required knowledge. It is addressed in our training and system description and is set by I&C as required by engineering.
Presently the program level for our lower Tave program (level is prgrammed to Tave) is 25% level from 0 to 15% power. and ramps linearly from 25% to 37.5% level from 15% power to 100% power.
At our present normal full Rx power level of 92% PZR program level is approximately 36.5%.
John Custer 89271 6/20/91
ENCLOSURE 2 125V DC Battery No.1 Sizing Calculation No. DC-1604, Supplement V
(For ICCNs Only)
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U j ect SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V3 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A.
S.
MATIONG TABLE OF CONTENTS Sheet 1.0 PURPOSE V5 2.0 RESULTS/CONCLUSIONS and RECOMMENDATIONS V6 2.1 RESULTS/CONCLUSIONS V6 2.1.1 Battery Capacity V6 2.1.2 Battery Terminal Voltage V6 2.1.3 Battery Charger Capacity V6 2.1.4 Battery Surveillance Test V7 2.2 RECOMMENDATIONS V8 Table 2.2.2: Service Test Profile V9 3.0 ASSUMPTIONS V10 4.0 DESIGN INPUT Vl Table 4.8: SBO Event Detailed V13 Load Profile 5.0 METHODOLOGY V18 5.1 Battery Capacity Calculations V18 5.2 Battery Terminal Voltage Calculations V18 5.3 Battery Charger Capacity Calculations V19 SCE 26-426 NEW 4/90
NES&L:DEPARTMENT CALCULATION SHEET
.ICC NO. N-A
CCN NO.
PGO CCN CONVERSION oject or DCP/MW Station Btackout Caic No.
DC-1604 Rev.
10 CCN No.
et SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V4 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S.
MAT IONG1.
____q TABLE OF CONTENTS (CONTINUATION)
Sheet
6.0 REFERENCES
V20 7.0 NOMENCLATURE V21 8.0 COMPUTATIONS V22 8.1 Battery Capacity V22 Table 8.1:
Battery Sizing V23 SBO Event Loading Conditions Figure 8.1: Battery Discharge Characteristics V26 Curves For GNB Type NCX-2550 8.2 Battery Terminal Voltage V27 Table 8.2:
Battery Terminal Voltage Calcs.
V27 SBO Event Loading Conditions 8.3 Battery Charger Capacity V28 SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET IMCC O. N PRELIM. CCN NO.
PAGE OF CCN CONVERSION Project or oCP/MP, Station Blackout Calc No. DC-1604 Rev.
10 CCN NO.
ject SONGS 1
125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V5 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A.
S. MATIONG 4 c 6f24 1.0 PURPOSE The purpose of this calculation supplement is:
To demonstrate that Battery No.
1 (D04) has the capacity and the capability to continue to supply power to the required components identified in Station Blackout Analysis Document No. 90050 during a 4-hour station blackout (SBO) duration, as well as support Emergency Diesel Generator (EDG)
No.1 manual random restart attempts throughout the SBO duration.
To demonstrate the capability of each battery charger, per Technical Specification 4.4.D.2.c(4) requirement, to restore the battery to a fully charged state within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> following SBO recovery.
Acceptance Criteria:
The battery, operating at 80% capacity and 610F electrolyte temperature, shall be able to satisfy the SBO duty cycle requirements. In addition, the battery terminal voltage shall be at least 106.91 volts to ensure at least 105 volts is maintained at the inverter terminals throughout the 4-hour SBO duration.
Each battery charger shall have adequate ampere capacity to restore the battery to a fully charged condition within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> following ac recovery from a station blackout event.
Since no design basis accidents or other events are assumed to occur immediately prior to or during station blackout, this calculation supplement is limited only to the verification of battery capability to provide for the SBO load requirements as well as the charger's ability to restore the battery in its fully charged state within the specified recharging time.
Credit is taken for manual dc load shedding operations during the SBO duration.
SCE 26-426 NEW 4/90
NES&L DEPARTMENT I
CCN NO.
N-1 CALCULATION SHEET I
PRELI.
CCN NO.
PAGE OF CCN CONVERSION S
Ject or DCP/19P Station Stackout calc No. DC-1604 Rev.
10 CCN NO.
ject SONGS I 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V6 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. MATIONG f,
2.0 RESULTS/CONCLUSIONS and RECOMMENDATIONS 2.1 RESULTS/CONCLUSIONS 2.1.1 Battery Capacity The results of the calculations shown in Table 8.1 indicate the battery can cope with the 4-hour station blackout, as well as support Emergency Diesel Generator (EDG) No. 1 manual random restart attempts throughout the 4-hour SBO duration, provided manual shedding of dc loads are performed in the sequence of operations identified in Sections 2.2.1 and 4.8.
2.1.2 Battery Terminal Voltage The results of the calculations shown in Table 8.2 indicate a minimum battery voltage of 107.59 volts, thereby ensuring at least 105 volts at the inverter input terminals during the SBO duration.
2.1.3 Battery Charger Capacity The results of the battery charger sizing calculation in Section 8.3 indicate a required charger ampacity of 555.35 amperes.
Each battery charger is rated 1000 amperes.
Therefore, each charger has the capacity and capability to restore the battery to a fully charged state within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> following ac power restoration.
SCE 28-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET CC O..
PRELI4. CCW NO.
I PAGE 6 OF'2 I
I CCN CONVERSION r
oject or DCP/MW Station Blackout Calc No. DC-1604 Rev.
10 CCN N O.
Uk j ect SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V7 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S.
MATIONG 6(74
- 4.
2.1.4 Battery System Surveillance Requirements Battery Service Test The new SBO-based load profile is more severe than the SISLOP-based accident load profile.
However, there is no present requirement for battery service testing to the SBO profile.
Should a service test to the SBO load profile be required in the
- future, station maintenance procedures, which presently use a service test profile based on the accident load profile shown in calculation Supplement T,
shall be revised accordingly as recommended in Section 2.2.2.
Battery Charger Capability Verification The 555.35 amperes charger ampacity required to recharge the battery following SBO recovery is well within the surveillance requirements of Technical Specification 4.4.D.2.c(4).
and Station Maintenance Procedures S0123-I-2.5 and S0123-I-2.6, which specify verification of battery charger capability to supply at least 800 amperes for at least 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
Therefore, no change to Technical Specification 4.4.D.2.c(4) or. Station Maintenance Procedures SO123-I-2.5 and 50123 1-2.6 is required.
2.2 RECOMMENDATIONS Based on the above results and conclusions, the following actions are recommended:
SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET ICCN No";NO.
PAGE OF CCN CONVERSION Ject or DCP/NMP Station Blackout Catc No.
DC-1604 Rev.
10 ICCN NO.
ject SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V8 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 ]A. S.
MATIONG aigrsz. 6(fql[
IR 2.2.1 When the new SBO requirements are implementd, revise Emergency Operating Instruction SO1-1.0 60 to include the following manual dc load shedding operations during SBO:
DC Bkr. No.
Trip After Load Description See Note 30 minutes Emergency RCP Thermal Barrier Pump 72-139 45 minutes Emergency Bearing Oil Pump 72-102 90 minutes Turbine Plant Annunciator 72-104 90 minutes Reactor Plant Annunciator 72-109 90 minutes Hydrogen Control Panel 72-110 90 minutes Digital Fault Recorder 72-111 90 minutes Turbine Controls 72-121 90 minutes Chemical Control Board 72-122 90 minutes Containment Spray System 72-123 90 minutes Sphere Isolation Valves 72-124 90 minutes Sequencer No. 1 72-127 90 minutes HVAC Control Board Annunciator 72-129 90 minutes Radwaste Control Board Annunciator 72-131 90 minutes Inverter No. 4 72-134 90 minutes NIS Coincidentor Cabinets A and B 72-136 90 minutes Inverter No. 2 72-140 90 minutes Emergency Lighting Switchboard 72-141 90 minutes Control Rods 72-138 180 minutes Emergency Hydrogen Seal Oil Pump NOTE: Turn off pump at the Control Room.
SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET PE
'NO.
PAGEI OF)1 CCU CONVERSION oject or DCP/MW Station BLackout Caic No.
DC-1604 Rev.
10 CCN NO.
ject SONGS 1
125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V9 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A.
S.
MATIONG
(/
2.2.2 Should a surveillance test based on the SBO load profile be required, revise Station Maintenance Procedures S0123-I-2.5 and S0123-I-9.301 to reflect the new surveillance service test profile shown in Table 2.2.2, which envelops the accident load profile.
TABLE 2.2.2 BATTERY SURVEILLANCE SERVICE TEST PROFILE Period in Mins.
0-1 1-30 30-45 45-90 90-180 180-239 239-240 DC Amps 1195 741 646 434 256 140 283 The minimum battery terminal voltage is 106.91 volts for Station Maintenance Procedure S0123-I-2.5 and 1.845 volts per cell for Station Maintenance Procedure S0123-I-9.301.
SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET O
CONO.
V PAGE OF CCN CONVERSION ect or DCP/MWU Station Blackout cac Mo. DC-1604 Rev.
10 CCN NO.
jet SONGS 1
125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V10 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. M4ATIONG (14 3.0 ASSUMPTIONS 3.1 Based on SONGS 1 Station Blackout Analysis Document No.
- 90050, Rev.
0, no credit can be taken for manual dc load shedding operations prior to 30 minutes into the station blackout.
3.2 After, failure of the Emergency Diesel Generator. to automatically start during the first minute, depending on starting air supply capability, multiple manual start attempts are assumed to occur randomly as follows:
During the 1-30 minute period of the duty cycle.
During the 30-45 minute period following manual tripping at the Control Room of the RCP Thermal Barrier Pump at the 30th minute. Credit is taken for DSD operation and Charging Pump operation within one hour.
During the 45-90 minute period of the duty cycle following manual tripping of the dc breaker for the Emergency Bearing Oil Pump at the 45th minute.
During the 90-180 minute period following tripping of additional dc load breakers at the 90th minute.
These load breakers are listed in Table 4.8.
During the 180-240 minute period following tripping of the dc breaker for-. the Emergency Hydrogen Seal Oil Pump at the 180th minute.
SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET E. CCNO.P PRELIM. CCN NO.
TPAGE OF JCCN CONVERSIO o ject or DCP/WIP Station Blackout Caic No. DC-1604 Rev.
10 CCN NO.
Ject SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V of28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR
- DATE, IRE DATE 0
A. S. MATIONG 4.0 DESIGN INPUT 4.1 IEEE Stds 485-1983 and 450-1980 recommendation that a battery be replaced when its actual capacity drops to 80% of its rated capacity and SONGS 1 Technical Specifications 4.4.D.2.e requirement that battery capacity is at least 80% of the manufacturer's rating when subjected to a performance discharge test.
4.2 Technical Specification 4.4.D.2.b.(3) which specifies 61 0F minimum battery electrolyte temperature.
4.3 SONGS 1 SBO Analysis Document No. 90050, Rev. 0, which identifies the 4-hour coping duration for SONGS 1,
designates the Dedicated Safe Shutdown (DSD) system as the alternate AC (AAC) power source, and analyzes AAC availability within one hour of SBO event and capability to power the required DSD equipment and instrumentation throughout the SBO duration.
4.4 Emergency Operating Instruction S01-1.0-60, Rev.
8, Loss of All AC Power identifying the non-vital dc loads to be shed. This includes the Emergency Bearing Oil Pump which, based on Westinghouse's estimated 30-40 minutes time for the turbine to come to rest following SBO initiation, can then be manually tripped after 45 minutes (Reference 6.6 of this calculation supplement).
4.5 Minimum 105 volts required at the inverter terminals based on inverter input low voltage shutdown setting of 104+/-1 volts dc (Reference 6.11).
4.6 Battery Charger walkdown information (360 amperes normal continuous dc output current on 5/28/91) from A. B. Samanta of Station Technical.
SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET
,as NO..1 PRELIM. CCN NO.
PAGE CCN CONVERSION oJ ect or DCP/NM Station Btackout Catc No. DC-1604 Rev.
10 jCCN NO.
Subject SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V12 of V28
-r REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. MATIONG (s
4.7 The proposed replacement for the Train B battery bank (Battery No. 2) will be adequate to support the station blackout requirements.
Control Room instrumentation and controls supplied from Train A Inverters 1 and 3, and Train B Inverter 5 will be sufficient to satisfy the minimum control room instrumentation during station blackout (Reference 6.12).
As such, loads noted in Table 4.8, including Train A Inverters 2 and 4, can then be manually tripped in order to reduce loading on Battery No. 1.
4.8 The resultant load profile shown in Table 4.8 developed based on:
The SISLOP-based loading tables of Table 5.1.142 of Supplement T, Revision 3 (DC-1604 Revision 9),
considering those loads associated with a LOP only. The random load (EDG restart) value for this calculation (Supplement V) is developed from the 0-1 minute loading of Supplement T Table 5.1.142.
Cycle XI load changes (the 10 amperes contingency load is used instead of the actual net load added since the service test was performed based on the load profile which included this 10 amperes contingency load).
Cycle XII contingencies (10 amperes).
Manual load stripping of selected dc loads to reduce battery loading.
SCE 26-426 NEW 4/90
NES&L DEPARTMENT C
LCULAION SHEET IM C" NO.
PAGE IOF 1
CCM CONVERSION o Ject or DCP/MMP Station Blackout Cate No. DC-1604 Rev.
10 CCN NO.
Subject SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V13 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A.
S.
MATIONG TABLE 4.8 SBO Event Detailed Load Profile Breaker No.
0 to 1 to 30 to 45 to 90 to 180 to Random
& Load ID 1 min 30 min 45 min 90 min 180 min 240 min Load Manual Actions Required 72-101 9.1 0.0 0.0 0.0 0.0 0.0 None Reheater Stm Dump Control 72-102 15.9 15.9 15.9 15.9 0.0 0.0 Open DC breaker 9 90 minutes Turbine Plant Ann 72-103 77.3 4.4 4.4 4.4 4.4 4.4 None 4160V Swgr 1A and iC 72-104 17.4.
17.4 17.4 17.4 0.0 0.0 Open DC breaker 3 90 minutes Reactor Plant Ann 72-105 0.0 0.0 0.0 0.0 0.0 0.0 90.0 None Emerg DG1 Exc Control 72-106 0.0 0.0 0.0 0.0 0.0 0.0 None Area Load Freq Cont 72-107 0.0 0.0 0.0 0.0 0.0 0.0 None 480V/4160V ACS Test Panel 72-108 56.1 0.1 0.1 0.1 0.1 0.1 None Gen &Xfr Relay Bus SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET C"'NO.
[PAGE OF CCN CONVERSION Woject or DCP/MMP Station Blackout Catc o. Dc-1604 Rev.
10 CCN NO.
Subject SONGS I 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V14 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE A.
S.
MATIONG Table 4.8 Continuation Breaker No.
0 to 1 to 30 to 45.to 90 to 180 to Random
& Load ID 1 min 30 min 45 min 90 min 180 min 240 min Load Manual Actions Required 72-109 2.7 2.7 2.7 2.7 0.0 0.0 Open DC breaker a 90 minutes Hydrogen Cont Pnl 72-110 3.8 3.8 3.8 3.8 0.0 0.0 Open DC breaker 2 90 minutes Digital Fault Rec 72-111 7.6 4.3 4.3 4.3 0.0 0.0 Open DC breaker 2 90 minutes Turb Cont 72-112 2.7 1.0 1.0 1.0 1.0 1.0 None 480V Swgr No. 1 72-113 0.0 0.0 0.0 0.0 0.0 0.0 None Turb Prot 72-114 31.5 0.0 0.0 0.0 0.0 0.0 21.0 None Emerg DGI Fuel 011 Pp 72-115 36.0 0.0 0.0 0.0 0.0 0.0 None Generator Field Cont; 72-116 1.5 0.6 0.6 0.6 0.6 0.6 None 480V Swgr No. 3 72-117 27.4 27.4 27.4 27.4 27.4 27.4 None DG Bldg Emerg Ltg 72-118 0.0 0.0 0.0 0.0 0.0 0.0 None SIS/LOP Lockout Rty SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET I
- N PACE( OF CCN CONVERSION oject or DCP/petP Station Blackout CaLc No.
DC-1604 Rev.
10 CCN NO.
Subject SONGS I
125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V15 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S.
MATIONG
/i /
Table 4.8 Continuation Breaker No.
0 to 1 to 30 to 45 to 90 to 180 to Random
& Load ID 1 min 30 min 45 min 90 min 180 min 240 min Load Manual Actions Required 72119 23.9 23.5 8.3 8.3 8.3 8.3 15.6 None ELP-1 Right Feed 72-120 94.6 63.2 0.0 0.0 0.0 0.0 Turn off pump from Control Room Emerg RCP 2 30 minutes Thermal Barrier Pp 72-121 4.6 4.6 4.6 4.6 0.0 0.0 Open breaker 2 90 minutes Chemical Cont Board 72-122 2.1 2.1 2.1 2.1 0.0 0.0 Open breaker 9 90 minutes Contairnent Spray Sys*
72-123 5.5 5.5 5.5 5.5 0.0 0.0 Open breaker 9 90 minutes Sphere Iso Valve 72-124 8.0 0.0 0.0 0.0 0.0 0.0 Open DC breaker 2 90 minutes Sequencer 1 72-125 0.0 0.0 0.0 0.0 0.0 0.0 Nore Portable Exc Control 72-126 19.1 17.3 2.8 2.8 2.8 2.8 16.3 None ELP-1 Left Feed 72-127 0.9 0.9 0.9 0.9 0.0 0.0 Open DC breaker 9 90 minutes HVAC Cont Board Ann SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCUL.LATION SHEET
[PRELIM
-1 ENO.
PAGE OF CCN CONVERSION W o ect or DCP/MW Station Blackout Catc No. DC-1604 Rev.
10 CCN NO.
Subject SONGS I 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V16 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. MATIONG a
(
f,
I
. ( 2k Table 4.8 Continuation Breaker No.
O to I to 30 to 45 to 90 to 180 to Random
& Load ID 1 min 30 min 45 min 90 min 180 min 240 min Load Manual Actions Required
.i......................................................................
72-128 2.2 0.1 0.1 0.1 0.1 0.1 None Cond Steam Durp Cont 72-129 1.9 1.9 1.9 1.9 0.0 0.0 Open DC breaker 2 90 minutes Radwaste Cont Bd Ann 72-130 12.7 2.9 0.1 0.1 0.1 0.1 None St Valves 72-131 54.7 54.7 54.7 54.7 0.0 0.0 open DC breaker a 90 minutes Inverter 4 72-132 24.9 0.0 0.0 0.0 0.0 0.0 None Gen Bus Disc Switch 72-133 0.0 0.0 0.0 0.0 0.0 0.0 None Spare 72-134 4.0 4.0 4.0
.4.0 0.0 0.0 Open DC breaker a 90 minutes NIS-Coine Cabs AAB 72-135 37.5 37.5 37.5 37.5 37.5 37.5 None Inverter 1 72-136 50.2 50.2 50.2 50.2 0.0 0.0 Open DC breaker 9 90 minutes Inverter 2 72-137 37.1 37.2 37.2 37.2 37.2 37.2 None Inverter 3 SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCLATON I-IFT CCN NO.
N-1 C A L U I.
TIOH PRELIM. CCN NO.
PAGE OF ICCN CONVERSION in roject or DCP/MMP Station Blackout Caic No. DC-1604 Rev.
10 jCCNi NO.
S W~~~C Subject SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V17 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A.
S.
MATIONG (61 24 1 Table 4.8 Continuation Breaker No.
0 to 1 to 30 to 45 to 90 to 180.to Random
& Load ID 1 min 30 min 45 min 90 min 180 min 240 min Load Manual Actions Required 72-138 174.0 116.0 116.0 116.0 116.0 0.0 Open breaker a 180 minutes Emergency Hydrogen Seat Oil Pp 72*139 318.0 212.0 212.0 0.0 0.0 0.0 Open DC breaker 2 45 minutes Emerg Brg Oil Pump 72-140 6.0 6.0 6.0 6.0 0.0 0.0 Open DC breaker 0 90 minutes Emerg Ltg Switchboard 72-141 3.8 3.8 3.8 3.8 0.0 0.0 Open 6C breaker a 90 minutes Cont Rods Cycle XI Contingency 10.0 10.0 10.0 10.0 10.0 10.0 None Cycle XII Contingency 10.0 10.0 10.0 10.0 10.0 10.0 None TOTAL 1194.7 741.0 645.3 433.3 255.5 139.5 142.9 NOTE:
Applicable for the 0-1 Minute and the Random Load columns, the load shown for each breaker column represents the load on that breaker coincident with the peak loading during that particular minute of the duty cycle.
SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET I:CCN NO.
1PAGE OF CCN CONVERSION oject or DCP/NIP Station BLackout Catc No. DC-1604 Rev.
10 CCN NO.
Ject SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V18 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 A.
S.
MATIONG r
5.0 METHODOLOGY Using the resultant load profile shown in Table 4.6, battery capacity and terminal voltages, as well as battery charger capacity are calculated as follows:
5.1 Battery Capacity Calculation The end-of-discharge voltage is first determined by adding the worst case battery-bus and bus-inverter voltage drops to the minimum inverter terminal input voltage. The voltage drops are calculated using the following formula.
VD = 2 x I x R x L where: I = load in amperes R = conductor resistance in ohms/1000 ft at 750C L = circuit length in feet With the end-of-discharge voltage established, the required battery capacity is then calculated using the GNB NCX-2550 discharge characteristics curves per IEEE Std 485 guidelines.
5.2 Battery Terminal Voltage Calculation The battery terminal voltages calculated for each period of the battery duty cycle are calculated as follows:
Load Amps is the load amperes for the period.
Adjusted Load Amps is the Load.Amperes multiplied by the Aging Factor and the Temperature Correction Factor.
Adjusted Load Amps per Positive Plate is the Adjusted Load Amperes divided by the number.of positive plates.
SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET "CCN NO.
PAGE OF CCN CONVERSION Q
act or DCP/eP Station Stackout Calc No. DC-1604 Rev.
10 CCN NO.
ject SONGS 1
125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V19 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. MATIONG
(.
( (fI
{
I____
Expended Amp-Hours per Positive Plate is the Adjusted Load Amperes per positive plate multiplied by the period duration.
For succeeding periods, it is the Expended Amp-Hours per Positive Plate of the period plus the Expended Amp Hours per Positive Plate of the preceding period.
Cell Volts is the cell voltage read directly from the battery discharge characteristics curves corresponding to the specific Amps per Positive Plate and Expended Amp-Hours per Positive Plate. The Becin voltage corresponds to the specific period Amps per Positive Plate and Expended Amp-Hours at the beginning of the period. The End voltage corresponds to the specific period Amps per Positive Plate and Expended Amp-Hours at the end of the period.
Battery Volts is the Cell Volts multiplied by the number 'of cells.
5.3 Battery Charger capacity The ampere-capacity of the charger is calculated using the following formula:
A = L + 1.1 (C/H) where: A = required capacity charger in amperes L = continuous load amperes H = number of hours for recharging C = ampere hours removed from the battery SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET I
NO.
PAGE OF CCN CONVERSION oject or DCP/MIW Station Blackout Catc No.
DC-1604 Rev.
10 LCCN NO.
'ect SONGS I 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V20 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. MATIONG a,&
6.0 REFERENCES
6.1 IEEE Standard 485-1983, Recommended Practice for Sizing Large Lead Storage Batteries for Generating Stations and Substations.
6.2 IEEE Standard 450-1987, Recommended Practice for Maintenance, Testing and Replacement of Large Lead Storage Batteries for Generating Stations and Substations.
6.3 Lotus 123 Computer Application Program, Release 2.01.
6.4 NUMARC 87-00, Guidelines and Technical Bases for NUMARC Initiatives Addressing Station Blackout at Light Water Reactors.
6.5 SONGS 1 Station Blackout Analysis Document No. 90050, Rev. 0.
6.6 Letter from R.G. Perez to R. Radakovic, dated 3/27/84 Westinghouse Site Input to Preliminary Battery Sizing Calculations.
6.7 One Line Diagram Dwg. 5102173, Revision 27.
6.8 Circuit Schedules M-30415-32 and M-30419-50.
6.9 SCE Electrical Engineering Guide, Section E9.2.
6.10 Emergency Operating Instruction S01-1.0-60, Rev. 8.
6.11 Repetitive Maintenance Order Nos.
96810000001, 96810000002, 96810000003 and 96810000057.
6.12 Letter from Bernie Carlisle to A.T. Kaneko, dated 6/21/91, Minimum Instrumentation and Controls Required in the Control Room During a Station Blackout, San Onofre Nuclear generating Station, Unit 1.
SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET I;
.'NO.
PAGEOF CCN CONVERSION Project or DCP/W Station Blackout Catc No.
DC-1604 Rev.
10 CCN NO.
ject SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V21 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. MATIONG SUL 7.0 NOMENCLATURE D02 is the equipment designator for Battery Charger Set A D03 is the equipment designator for Battery Charger Set B D04 is the equipment designator for Battery No. 1 SCE 25-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET
!CCNO. W'NO.
PAGE OF CCN CONVERSION g
ect or DCP/NP Station stackout Calc No.
DC-1604 Rev.
10 CCN NO.
ect SONGS 1 125V DC BATTERY No.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V22 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A.
MATIONG Q
4 8.0 COMPUTATIONS 8.1 Battery Capacity The minimum end-of-discharge voltage for the 58-cell battery bank (Vbattery) is the sum of the minimum inverter.input voltage (Vinverter),
the worst case battery-bus voltage drop (VDbattery-Ws) and bus-inverter voltage drop (VDbus-inverter)*
From References 6.7, 6.8 and 6.9:
Battery-Bus feeder : 3-1/C#5O0 MCM per pole 47.5 ft circuit length 0 0.0265 ohm/1000 ft @ 75 C Bus-Inverter feeder: 1/C#4/0 MCM per pole 132 ft circuit length 0.0626 ohm/1000 ft @ 75 C The worst case voltage drop on the battery-bus feeder occurs during the initial minute of the duty cycle when battery load is at maximum (1195 amperes).
VDbate.tas
= 2(1195) (0.0265/3) (47.5/1000)
= 1.0028 volts The Inverter 4 supply feeder voltage drop represents the worst case bus-inverter voltage drop. Inverter 4 draws the most current (54.7 amperes) and is located farthest from the dc bus. Inverter 4 is located at the 4KV Switchgear Room while Inverters 1, 2 and 3 as well as the dc bus are all located in the DC Switchgear Room.
VDgjs-ietwrter = 2(54.7)(0.0626)(132/1000)
= 0.9040 volt The minimum required inverter input voltage is:
Vinverter 105 volts SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET P
CCN CONVERSION a
roject or DCP/W Station Blackout Catc No.
DC-1604 Rev.
10 CCN NO.
iject SONGS 1 125V DC BATTERY NO.
I SIZING Shet No.
SUPPLEMENT V Sheet V23 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. MATIONG 1;X Therefore, the minimum battery end-of-discharge voltage is:
Vbattery 105 + 1.0028 + 0.9040
= 106.91 volts or 1.845 volts per cell Using the methodology described in Section 5.1, in conjunction with the battery discharge characteristics curves of Figure 8.1, battery capacity is calculated as shown in Table 8.1 below.
TABLE 8.1 Battery Sizing Calculations SBO Event Loading Conditions Lowest Expected Electrolyte Teep2 Ninmtu Ctt Voltages Celt Mfrs Cett Type:
Pos. Plates:
61 F 1.845 9s uCx*2550 17 (1)
(2)
(3)
(4)
(5)
(6)
(7)
Oarige in Duration Tim to End Capacity at Required Section Site Load Load of Period of Section T Mn late (3)/(6)
- Positive olates Period (asperes)
(aspere)
(aietes)
(mianutes)
- Asps/Pos.
Pt.
Pos. Values Meg. ValuesSection I
- First Period Only
- If AZ Is greater than Al, go to Section 2 Al At1* 0 *iM l
Ml 1195.00 1195.00 1
1 104 11.49 Section is Total 11.49 Section 2
- First Twe Periods ntly
- If A3 is greater than AZ. go to Section 3
- 1.
AlAt
- 0m MI a T N+Mt n 1195.00 1195.00 1
30 74 16.15 2
AZ AZ
- Al.
a T a NZ*
741.00
- 454.00 29 29 74
- 6.14 Section 2:
S Total 16.15
- 6.14 Total 10.01 SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET ICC, IO.'11.1 PAGE OF 1 CCN CONVERSION Project or DCP/MW Station Blackout Cate No. DC-1604 Rev.
10 CCN NO.
ject SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.
SUPPLEMENT V Sheet V24 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A.
S.
HATIONG TABLE 8.1 Continuation Section 3 - First Three Periods Only If A4 is greater than A3, go to Section 4 Al.
Al*
0 -
NI T UN1M1+3 1195.00 1195.00 1
4S 65 18.38 2
AZ A2 -A a K2 T
- M3.
741.00
-454.00 29 44 65
-6.98 3
A3.
A-A.
Ms T*X3.
646.00
.95.00 15 15 85
- 1.12 section 3:
Sub-Total 18.38
-8.10 Total 10.28 Section 4
- First Four Periods Only
- If AS Is greater than A4, go to Section 5 Al Al - 0a Ni T a N*M2*#M4 1195.00 1195.00 1
90 48 24.90 2
A2 AZ - Al =
X2
- T *N2*SM3+4 741.00
-454.00 29 89 48 1
-9.46 3
AS.
A-AZ w X.
.4 646.00
-95.00 is 60
- 5.
4 A
- A-AS.
M..
Ta..
434.00
-212.00 45 45 65
-3.26 Section 4:
Sub-Total 24.90
-14.36 Total 10.54 Section 5
- First five Periods only - If A6 is greater than AS. go to Section 5 Al Al - 0 a N
T m 1NI+N3+M4+S a 1195.00 1195.00 180 33 36.21 2
AZ a AZ Al a
- a.
- a.
Zeasses.
741.00
- 454.00 29 17933 13.76 3
ASa A - A a a
14o+140.
644.00
-00 00 is 150 36
- 2.6 A4 w A4
- A3*
Ma a T a 44NS
- 434.0
-212.00 45 135 39
- S."
5 A3 a AS -
A4v S
Ta NS a 256.00
-178.00 90 90 48
-3.71 Section St Sib-Total 36.21
-25.54 Total 10.67 CE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET
[cc, No..
PAGE OF No.
C-104 Rv.
0 1CCU CONVERSION Project or DCP/MMP Station Blackout Catc o. DC1 Rev.
10 NO.
Wl ibject SONGS 1 125V DC BATTERY No.
1 SIZING Sheet Mo.
SUPPLEMENT V Sheet V25 of V2 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. M4ATIONG qvg....c-(*
TABLE 8.1 Continuation section 6 - First Six Periods only if AT is greater than A6, go to Section 7 I
Al.
Al M-0 T a 1+M2+.....M6 1195.00 1195.00 1
240 27 4.26 2
A2 A -
A2.
T MN2*M3*N44M5+M6 741.00
.454.00 29 239 27
-16.81 3
A3*
A3
- A2s KM3..
T a+N3.M4++
646.00
-95.00 15 210 29
-3.28 SA4 A3 a K4 T
4MSM6 434.00
- 212.00 45 195 31
- 6.84 5
- A4.
NS.
T
- MSN*6 256.00
-173.00 90 150 36
.4.94 6
A6 A6
- AS.
M6.
T a M6 140.00
- 116.00 60 60 58
- 2.00 section 6:
s *Totat 44.26
- 33.87 Total 10.39 Randee Load anty (Emergency Dieset generator Restart)
ItAt Alt
- 0 M
T M 143.00 143.00 1
1 1.3 Madsu Section Size Randee Section Size Ucorrected Size 10.67
+
1.38 12.05 Unc. Site Terp. Correction Factor Aging factor Required Site I2.05 x
1.11 x
1.23 16.71 argin * (Actuet Size
- Required Size) x to05 / Actial Size a 1.68 %
NOTE:
The random load represents the EDG manual restart loads which could occur anytime between 1-240 minutes. The load associated with EDG auto-start is already included in the peak loading for the 0-1 minute period..
SCE 26-426 NEW 4/90
NES&L DEPARTMENT CALCULATION SHEET PRELIN. CCN NO.
PAGE OF CCN CONVERSION oject or DCP/"aP Station Btackout Catc No. DC-1604 Rev.
10 CCU NO.
ject SONGS 1 125V DC BATTERY NO.
I SIZING Sheet No.
SUPPLEMENT V Sheet V26 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A.
S.
MATIONG FIGURE 8.1 Battery Discharge Characteristics Curves GNB Type NCX-2550 2.00 INITIAL VLTS AEAGE VOLTS TO 0
.7
-1.80>
DISCHARGE CHARACTERISTICS 1.70 OF GNU TYPES:
W NCX & NAX-600 NCX & NAX-1650 -
1.60 cg NCX & NAX-750 NCX & NAX-1800 NCX & NAX-900 NCX & NAX-1950 NCX & NAX-1050 NCX & NAX-2100 2401e NCX & NAX-1200 NCX & NAX-2250 NCX & NAX-1350 NCE & NAX-2400 220220 NCX & NAX-1500 NCX & NAX-2sso 200 WITH FULLY CHARGED SPECIFIC
-- 111
-GRAVITY OF 1.215 @ 77F. (25C.)
180V1 TEST NO. T-4774 0 M160 LU140 V
co 120 0
0 10 20 30 4o so 6070o 80 90 100 110 20 AMPERES PEA POSITIVE re-10orone SCE 26-426 NEW 4/go
NES&L DEPARTMENT ICCN NO.
N-11 CALCULATION SHEET PRELIM. CCU NO.
PAGE OF CCN CONVERSION roject or DCP/HeP Station Btackout Catc No.
DC-1604 Rev.
10 CCN NO.
i j ect SONGS 1 125V DC BATTERY NO.
1 SIZING Sheet No.,
SUPPLEMENT V Sheet V27 of V2 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. MATIONG 8.2 Battery Terminal Voltage Using the methodology described in Section 5.2, in conjunction with the battery discharge characteristics curves of Figure 8.1, battery terminal voltages during the discharge duration are calculated as shown in Table 8.2.
TABLE 8.2 Battery Terminal Voltage Calculations SBO Event Loading Conditions Time Period In Minutes 0-1 1-30 30-31 31-45 45-90 90-180 180-240 Load AMps 1195.00 741.00 789.00 646.00 434.00 256.00 140.00 Adjusted Load Asps 1658.06 1028.14. 1094.74 896.33 602.18 355.20 194.25 Adjusted Load Aiss 97.53 60.48 64.40 52.73 35.42 20.89 11.43 per Positive Plate upended Asp*ours 1.63 30.86 1.07 13.93 57.42 88.76 100.19 per Positive Plate Begin 1.855 1.915 1.880 1.930 1.955 1.945 1.945 Catt volts End 1.855 1.885 1.910 1.915 1.905 1.910 1.935 legin 107.59 111.07 109.04 111.94 113.39 112.81 112.81 Battery Vtts and 107.59 109.33 110.78 111.07 110.49 110.78 112.23 The EDG manual restart random load is imposed on the 30 31 minute because the lowest battery terminal voltage is calculated to be at the 30th minute. The initial minute end voltage which is lower is not considered to be the conservative voltage because the battery voltage recovers immediately following a load reduction and that diesel generator restart is not likely to occur immediately following a failed auto-start.
SCE 26-428 NEW 4/90
NebatutFAMIMLN f N~~.b&LLD~AKIM~NI NO. N1 PG~Ol CALCUIATION SHEET RELI.O.
PAGECC OF CCN CONVERSION Project dr DCP/MMP Station Blackout Catc No.
DC-1604 Rev.
10 CCN NO.
ect SONGS 1 125V DC BATTERY NO.
I SIZING Sheet No.
SUPPLEMENT V Sheet V28 of V28 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0
A. S. MATIONG 8.3 Battery Charger Capacity Using the methodology described in Section 5.3, the required battery charger capacity is calculated below.
From the resultant load profile, the amperes removed from the battery (C) and the maximum continuous load (L) are:
C =
1195(1/60) + 741(29/60) + 709(15/60) +
434(45/60) + 256(90/60) + 140(59/60 + 283(1/60)
=
1407.95 ampere hours From Design Input 4.6:
L =
360 amperes The required recharging time (H) is:
H =
8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> The required charger ampere capacity (A) is:
A =
L + 1.1(C/H)
=
360 + 1.1(1407.95/8) = 555.35 amperes Battery chargers A and B, each rated 1000 amperes, therefore, have the capability of restoring the battery to a fully charged state within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> after ac power restoration.
SCE 26-426 NEW 4/90
ENCLOSURE 3 Justification for Removal of Loads From Battery No. 1 During a Station Blackout Justification For Removal of Loads From Battery No. 1 During a Station Blackout The Control Room must remain functional for the four hour coping duration of the SBO. Plant coping during the SB0 is performed utilizing the DSD diesel.
The DC loads on battery No. 1 listed below are removed during the station blackout and are not required for the Control Room to remain functional.
The justification for removing loads at the indicated times during a blackout are provided. It should be noted that the plant configuration after removing the DC loads listed below is no different than the plant configuration when using the DSD diesel for plant shutdown after an Appendix R fire.
- 1)
DC Breaker No. 72-120 - Emergency RCP Thermal Barrier Pump The Emergency RCP Thermal Barrier Pump can provide alternate cooling to the RCP seals. However, during an SBO event, the thermal barrier pump is not credited. Seal cooling is provided along with RCS inventory makeup by the North Charging pump powered by the DSD diesel.
The SBO RCS inventory calculation assumes seal leakage consistent with NUMARC 87-00 guidelines for RCS inventory loss until charging is established utilizing the DSD diesel.
This load can be shed at any time.
- 2)
DC Breaker No. 72-139 - Emergency Bearing Seal Oil Pump.
The Turbine Bearing Emergency Oil Pump can be shed after the turbine comes to rest. Westinghouse estimates that the standard time frame for the turbine to come to rest is 30 to 40 minutes. The pump can be manually tripped after this occurs which can be assumed to be 45 minutes.
- 3)
DC Breaker No. 72-138 - Emergency Hydrogen Seal Oil Pump.
The Emergency Seal Oil Pump is used to prevent hydrogen leakage from the generator. After the DSD diesel has been started and loaded, operators will be available to remove hydrogen from the generator.
This process includes depressurizing, degassing and CO2 flushing.
Assuming one hour to start and load the DSD diesel and two hours to degas and partially flush the generator, this pump can be manually tripped after three hours.
-2
- 4)
DC Breaker No. 72-102 - Turbine Plant Annunciator DC Breaker No. 72-104 -
Reactor Plant Annunciator DC Breaker No. 72-109 - Hydrogen Control Panel Annunciator DC Breaker No. 72-127 - HVAC Control Board Annunciator DC Breaker No. 72-129 - Radwaste Control Board Annunciator These annunciators do not provide an instrument or control function and can be removed at any time.
- 5)
DC Breaker No. 72-110 - Digital Fault Recorder This provides a diagnostic tool to monitor pre-fault and post fault conditions in breakers and power supplies. This is not required to cope with a SBO and can be removed at any time.
- 6)
DC Breaker No. 72-111 - Turbine Controls After the turbine has tripped, these controls are no longer required and can be removed at any time.
- 7)
DC Breaker No. 72-121 - Chemical Control Board This provides the capability to obtain a Steam Generator Blowdown sample. This load is not required to cope with a SBO and can be removed at any time.
- 8)
DC Breaker No. 72-124 - Sequencer No. 1 The EDG has failed to start as part of the SB0 scenerio and auto sequencing of the EDG is not required. This load can be removed at any time.
- 9)
DC Breaker No. 72-140 - Emergency Lighting Switchboard This provides DC control power to the incoming normal and standby supply breakers for the AC lighting switchboard. This load can be removed at any time.
- 10)
DC Breaker No. 72-141 - Control Rods Once the reactor has tripped this load is no longer required to cope with a SBO and can be removed at any time.
- 11)
DC Breaker No. 72-122 - Containment Spray System DC Breaker No. 72-134 - NIS Coincidentor Cabinets A and B Accidents are not assumed to occur concurrent with the SBO event.
Therefore these loads are not required to cope with an SBO and can be removed at any time.
-3
- 12)
DC Breaker No. 72-123 - Sphere Isolation Valves This breaker powers the isolation valves for the sphere sample, sump discharge, and RCS drain tank discharge lines. They all fail closed on loss of DC power. Closure of these valves meets the SB0 position on establishing containment integrity. This load can be removed at any time.
- 13)
DC Breaker No. 72-131 - Inverter No. 4 DC Breaker No. 72-136 - Inverter No. 2 Inverters 1 and 3 will provide the minimum instrumentation required for the Control Room to remain functional during a SBO. Inverters 2 and 4 provide instrumentation that is redundant to that provided by Inverters 1 and 3.
Additionally, with the shedding of these breakers, the control valves powered by Inverters 2 and 4 are left in the same configuration as when the breakers are shed during a plant shutdown after an Appendix R fire which utilizes the DSD diesel.
SBO-BAS.MG2