ML13018A134
| ML13018A134 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  (DPR-080, DPR-082) |
| Issue date: | 01/15/2013 |
| From: | Schrader K, Sharp M Pacific Gas & Electric Co |
| To: | Joseph Sebrosky Plant Licensing Branch IV |
| Sebrosky J | |
| References | |
| TAC ME0369, TAC MF0368 | |
| Download: ML13018A134 (40) | |
Text
DIABLO CANYON POWER PLANT Pre-application Meeting, Diesel Generator License pp g,
Amendment Request January 15, 2013 Ken Schrader Regulatory Services Regulatory Services Pacific Gas & Electric Co.
Avila Beach, CA kjse@pge.com 805-545-4328 Mark Sharp Engineering Manager, Licensing Basis Verification Project Basis Verification Project Pacific Gas & Electric Co.
Avila Beach, CA masl@pge.com 805-788-0134 11
Agenda Diablo Canyon Power Plant (DCPP)
Diablo Canyon Power Plant (DCPP)
Diesel Generator (DG) Licensing Basis Changes to License Amendment Request Changes to License Amendment Request (LAR) Scope since August 7, 2012 meeting Issues to be Resolved by LAR Issues to be Resolved by LAR Scope of Tech Spec (TS) Changes S
ifi TS Ch Specific TS Changes Staff Feedback 2
DCPP DG Licensing Basis Safety Guide 9 (SG 9) dated March 10 1971 Safety Guide 9 (SG 9), dated March 10, 1971 Provides basis for DG design DG Ratings:
DG Ratings:
2600 kW, Continuous (8000 hours0.0926 days <br />2.222 hours <br />0.0132 weeks <br />0.00304 months <br /> per year) 2750 kW, 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> per year 3000 kW, 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 3100 kW, 30 minutes per year Generator full load rating at 80% PF = 3250 kVA Generator full load rating at 80% PF = 3250 kVA Approved exception to SG 9, Regulatory Position C.4 for AFW pump frequency recovery time 3
p p
q y
y
DCPP DG Licensing Basis Regulatory Guide (RG) 1 108 Revision 1 Regulatory Guide (RG) 1.108, Revision 1 Provides basis for DG testing Approved exceptions to RG 1 108 Rev 1:
Approved exceptions to RG 1.108, Rev 1:
Regulatory Position 2.a for DG surveillance frequency Regulatory Position 2.a.(5) for modified DG hot start Regulatory Positions 2.a.(9), 2.d, 2.e, and 3 for DG test validation Regulatory Positions 2 a (3) and 2 c (2) for verification Regulatory Positions 2.a.(3) and 2.c.(2) for verification that DG cooling system functions within design limits 4
DCPP DG Licensing Basis RG 1 137 Revision 1 RG 1.137, Revision 1 Endorses ANSI N195-1976 which provides basis for fuel oil and lube oil volume requirements q
5
Changes to LAR Scope PG&E will not include TSTF-501 changes S
f Simplifies LAR changes No change to TS 3.8.3 fuel oil storage tank and lube oil inventory volume requirements lube oil inventory volume requirements Additional DG Load Study Analyses L
di ft 2 h d t i
d Loading after 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> determined Loading after 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 2680 kW at maximum frequency of 60 8 Hz and maximum voltage of frequency of 60.8 Hz and maximum voltage of 4400 V (60.8 Hz/4400 V)
Load in 22-hour portion of SR 3.8.1.14 bounded 6
p
Changes to LAR Scope Increase DG loading band for SR 3.8.1.3 (1-hour DG capability test)
Revise from 2340 kW and 2600 kW to 2750 kW and 2860 kW Minimum load band value bounds 2000-hour rating and DG loading at 60 8 Hz/4400V rating and DG loading at 60.8 Hz/4400V Added DG cooling system function requirements to SR 3 8 1 3 and SR 3 8 1 14 requirements to SR 3.8.1.3 and SR 3.8.1.14 Satisfy RG 1.108 Rev 1 Position 2.c.(2) for verification that DG cooling system functions 7
verification that DG cooling system functions
Changes to LAR Scope Increase required day tank volume for SR 3.8.1.4 (fuel oil day tank volume)
Increase required day tank usable fuel oil volume Will not relocate volume to TS Bases Increase DG loading band for SR 3.8.1.10 (DG full load rejection)
Revise from 2340 kW and 2600 kW to 2750 kW d 2860 kW 2750 kW and 2860 kW Minimum load band value bounds 2000-hour rating and DG loading at 60 8 Hz/4400 V 8
rating and DG loading at 60.8 Hz/4400 V
Changes to LAR Scope Increase DG minimum load for SR 3.8.1.14 (24-hour DG capability test)
Current loading band for 22-hour portion revised from 2340 kW and 2600 kW to 2680 kW and 2750 kW 2680 kW bounds DG loading at 60 8 Hz/4400 V 2680 kW bounds DG loading at 60.8 Hz/4400 V Added information on basis for no DG derating due to high air temperature derating due to high air temperature Added summary of updated ASHRAE analysis for meteorological data for 1992 through 2012 9
meteorological data for 1992 through 2012
Issues to be Resolved by LAR DG maximum steady state loading exceeds DG maximum steady state loading exceeds 2000-hour DG rating (2750 kW) at current Surveillance Requirement (SR) maximum q
(
)
frequency and voltage values Current SR maximum frequency value = 61.2 Hz, q
y voltage value = 4400 V Current administratively controlled maximum frequency value = 60 5 Hz (including 0 25 Hz instrument unc) value = 60.5 Hz (including 0.25 Hz instrument unc)
DG loading analyses maximum 60.8 Hz/4400 V maintains load < 2750 kW 10 10 maintains load 2750 kW
Issues to be Resolved by LAR Current SR load values based on Standard Current SR load values based on Standard TS (STS) that are based on RG 1.9, Rev 3 as opposed to RG 1.108, Rev 1 pp RG 1.9, Rev 3 assumes maximum loading below continuous DG rating RG 1.108, Rev 1 requires demonstration of full-load-carrying capability (continuous DG rating)
DG maximum loading at 60.8 Hz/4400 V (2738 kW) exceeds continuous DG rating (2600 kW) 11 11 (2600 kW)
Issues to be Resolved by LAR Current SR Power Factor (PF) values do not Current SR Power Factor (PF) values do not bound DG loading analysis calculated values Current SR minimum PF value = 0.87 Current SR minimum PF value 0.87 DG loading analysis minimum PF value = 0.848 Current administratively controlled minimum PF = 0.85 12
Issues to be Resolved by LAR Current SR day tank volume based on Current SR day tank volume based on continuous rating versus maximum loading RG 1.137, Rev 1 endorses ANSI N195-1976, RG 1.137, Rev 1 endorses ANSI N195 1976, which requires each day tank to contain fuel oil for at least 60 minutes of DG operation assuming fuel il i
i h h DG i
100%
oil consumption with the DG running at 100%
continuous rated load plus 10% additional margin Required fuel oil for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> of DG operation at Required fuel oil for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> of DG operation at maximum loading (2738 kW) is greater than current SR minimum day tank volume (250 gal) 13 13 y
(
g )
Issues to be Resolved by LAR Current SR full load rejection test value does Current SR full load rejection test value does not meet RG 1.108, Rev 1 requirements RG 1.108, Rev 1 requires demonstration of proper RG 1.108, Rev 1 requires demonstration of proper operation during DG load shedding, including a test of complete loss of load Consistent with STS, current SR provides a loading band between 90% and 100% of continuous DG rating (2340 kW to 2600 kW) continuous DG rating (2340 kW to 2600 kW)
DG maximum loading at 60.8 Hz (2738 kW) exceeds continuous DG rating (2600 kW) 14 14 exceeds continuous DG rating (2600 kW)
Issues to be Resolved by LAR Current SR capability test load values do not Current SR capability test load values do not meet RG 1.108, Rev 1 requirements RG 1.108, Rev 1 requires demonstration of RG 1.108, Rev 1 requires demonstration of full-load-carrying capability (continuous DG rating) for intervals not less than 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> (SR 3.8.1.3) and 24 h (SR 3 8 1 14) 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (SR 3.8.1.14)
Consistent with STS, current SRs provide a loading band between 90% and 100% of loading band between 90% and 100% of continuous DG rating (2340 kW to 2600 kW) for full-load-carrying capability tests 15 15 y g p
y
DCPP DG Loading Analyses PG&E commissioned DG Load Study Analyses PG&E commissioned DG Load Study Analyses to evaluate vital 4160 V Engineered Safety Features (ESF) bus loading under various Design Basis Accident (DBA) Scenarios Addresses NRC senior resident inspector b
ti l t d t NRC T I
t ti observations related to NRC Temporary Instruction 2515/176 DG Load Study Analyses are complete DG Load Study Analyses are complete 16 16
DCPP DG Loading Analyses The following DBAs are considered in the DG Loading Analyses:
Event 1: Large Break Loss of Coolant Accident (LBLOCA)
Event 2: Small Break Loss of Coolant Accident (SBLOCA)
Event 2: Small Break Loss of Coolant Accident (SBLOCA)
Event 3: Steam Generator Tube Rupture (SGTR)
Event 4: Steamline Rupture Inside Containment at Power Event 5: Steamline Rupture Inside Containment at Hot Zero Power Event 6: Feed Line Break Event 7: Loss of Normal Feedwater Event 8: Loss of Offsite Power (LOOP)
Event 9: Station Blackout (SBO) 17 17
(
)
DCPP DG Loading Analyses The following vital 4160 V ESF bus loading cases are considered for each of the postulated DBAs evaluated in the DG Loading Analyses:
Case 1: All DGs operating, all vital 4160 V ESF buses (F, G & H) energized with single component failure considerations energized with single component failure considerations Case 2: Vital 4160 V ESF bus F has failed resulting in accident loads being supplied by vital 4160 V ESF buses G and H Case 3: Vital 4160 V ESF bus G has failed resulting in accident Case 3: Vital 4160 V ESF bus G has failed resulting in accident loads being supplied by vital 4160 V ESF buses F and H Case 4: Vital 4160 V ESF bus H has failed resulting in accident loads being supplied by vital 4160 V ESF buses F and G 18 18 loads being supplied by vital 4160 V ESF buses F and G
DCPP DG Loading Analyses The DG Loading Analyses determine the mechanical equipment load demands for the large 4160 V and 480 V rotating equipment (pumps &
fans) and static equipment (heaters inverters) fans) and static equipment (heaters, inverters) powered by the vital 4160 V ESF buses Both limiting single component failures and vital 4160 V ESF bus f il id d i th l
t d t i
th failures were considered in the analyses to determine the maximum steady state mechanical load demands of the rotating equipment on the vital 4160 V ESF buses A
i t ll d d
/f tili d t As-installed vendor pump/fan curves were utilized to determine the most limiting mechanical loading considering either the actual equipment performance or the equipment run out conditions where appropriate 19 19 or the equipment run-out conditions where appropriate
DCPP DG Loading Analyses The DG Loading Analyses utilize the DCPP Emergency Operating Procedure pathways and the Safety Analyses of Record to determine electrical demands that are manually loaded onto the vital demands that are manually loaded onto the vital 4160 V ESF buses following the postulated DBAs The analyses determine when and for how long operator i
l t d d
t ti ll d l d
i d
manipulated and automatically sequenced loads are energized following the postulated DBAs No credit was taken for any Time Critical Operator Action d
t d
ti f
t ti it l 4160 V ESF b assumed operator reduction of automatic vital 4160 V ESF bus loading No credit taken for time delay for loads manually started by t
(
l l d
d t b
t t d t 0 d )
20 20 operators (manual loads assumed to be started at 0 seconds)
DCPP DG Loading Analyses The maximum mechanical load demands, the manually y initiated demands, and the automatically initiated demands are then tabulated to determine all 480 V and 4160 V electrical demands that are automatically and manually y
y loaded onto the vital 4160 V ESF buses following the postulated DBAs The DG Loading Analyses evaluate the sequenced load on The DG Loading Analyses evaluate the sequenced load on the DGs at the maximum DG output frequency (60.8 Hz) and voltage (4400 V) and consider the effects of system frequency DG output voltage and equipment load losses on frequency, DG output voltage, and equipment load losses on the DGs Load after 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> reduced due to lower auxiliary feedwater f
21 21 flow demands
The summarized vital 4160 V ESF bus loading results from the DG Loading Analyses with the DG operating at the proposed maximum Loading Analyses with the DG operating at the proposed maximum steady state frequency of 60.8 Hz and 4400 V are as follows:
Unit DG Bus Description Loading Loading Power Unit DG Bus Description
< 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />
> 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> Factor 1
1-3 F
Event 1, Case 4; LBLOCA, Bus H is De-Energized 2730 kW 2669 kW 84.9%
1-2 G
Event 1, Case 4; 2652 kW 2652 kW 85 7%
1 1-2 G
LBLOCA, Bus H is De-Energized 2652 kW 2652 kW 85.7%
1-1 H
Event 1, Case 3; LBLOCA, Bus G is De-Energized 2678 kW 2617 kW 86.7%
2-3 F
Event 1, Case 4; 2738 kW 2677 kW 84 8%
2 2-3 F
LBLOCA, Bus H is De-Energized 2738 kW 2677 kW 84.8%
2-1 G
Event 1, Case 4; LBLOCA, Bus H is De-Energized 2644 kW 2644 kW 85.0%
2 2 H
Event 1, Case 3; 2657 kW 2596 kW 86 7%
22 22 2-2 H
LBLOCA, Bus G is De-Energized 2657 kW 2596 kW 86.7%
DCPP DG Loading Analyses The DG Loading Analyses demonstrate that the g
y DGs have sufficient capacity and margin to fulfill the onsite power source requirements established in GDC 17, Electric Power Systems, 1971 y
The DG Loading Analyses demonstrate the DGs satisfy SG 9, Reg lator Position C 4 req irement that the peak contin o s Regulatory Position C.4 requirement that the peak continuous steady-state loading of the DGs under maximum output frequency and voltage following a postulated DBA does not d th ll f th 2000 h DG ti (2750 kW) exceed the smaller of the 2000-hr DG rating (2750 kW), or 90% of the 30-minute DG rating (90% of 3100 kW = 2790 kW) 23 23
Scope of TS Changes SR 3.8.1.3 (1-hour DG capability test)
DG f ll l d
i bilit t t b d
i d
DG full-load-carrying capability test band revised Added DG cooling systems function within design limits SR 3 8 1 4 (f l
il d k
l
)
SR 3.8.1.4 (fuel oil day tank volume)
Day tank fuel oil requirement revised SR 3.8.1.10 (DG full load rejection)
DG operating PF value revised DG operating PF value revised DG full-load rejection test load value revised 24
Scope of TS Changes SR 3 8 1 11 (LOOP)
DG maximum steady state operating frequency revised SR 3 8 1 14 (24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> DG capability test)
SR 3.8.1.14 (24-hour DG capability test)
DG operating PF value revised DG 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> full load carrying capability test load values DG 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> full-load-carrying capability test load values revised Added DG cooling systems function within design limits SR 3.8.1.15 (DG hot re-start test)
DG full-load-carrying capability pre-test load values revised DG full-load-carrying capability pre-test load values revised 25
Scope of TS Changes SR 3 8 1 19 (LOOP and Safety Injection)
SR 3.8.1.19 (LOOP and Safety Injection)
DG maximum steady state operating frequency revised 26
Specific TS Changes SR 3 8 1 3 (1-hour DG capability test)
SR 3.8.1.3 (1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> DG capability test)
Current loading band revised from 2340 kW and 2600 kW to 2750 kW and 2860 kW
Minimum load band value bounds maximum DG loading at frequency of 60 8 Hz and voltage of 4400 V frequency of 60.8 Hz and voltage of 4400 V
Maximum load band value allows for immediate retest 27 27
Specific TS Changes SR 3 8 1 4 (fuel oil day tank volume)
SR 3.8.1.4 (fuel oil day tank volume)
Current DG day tank volume revised from
> 250 gal to > 258 gal of usable fuel oil g
g Minimum volume value bounds 2000-hour DG rating and maximum DG loading at 60.8 Hz/4400 V 28 28
Specific TS Changes SR 3 8 1 4 (fuel oil day tank volume)
SR 3.8.1.4 (fuel oil day tank volume)
Meets ANSI N195-1976 requirement to ensure each day tank contains fuel oil for at least 60 minutes of operation assuming fuel oil consumption with the DG running at 100% continuous rated load plus a minimum additional fuel oil volume minimum additional fuel oil volume margin of 10%
29
Specific TS Changes SR 3.8.1.10 (DG full load rejection)
Current loading band revised from 2340 kW and 2600 kW to 2750 kW d 2860 kW 2750 kW and 2860 kW
Minimum load band value bounds 2000-hour DG rating and maximum DG loading at 60.8 Hz/4400 V Current PF revised from 0.87 to 0.84 to bound DG load analysis minimum power factor of 0.848
Consistent with STS note is added that if grid conditions do
Consistent with STS, note is added that if grid conditions do not permit, the PF is not required to be met and shall be maintained as close as practicable 30
Specific TS Changes SR 3 8 1 11 (LOOP)
Current maximum steady state frequency revised from 61.2 Hz to 60.8 Hz
DG loading analyses establish maximum steady state DG loading at a maximum 60.8 Hz/4400 V
Current maximum frequency administratively controlled
Current maximum frequency administratively controlled 60.5 Hz
Instrument uncertainty values included in surveillance test procedures procedures 31
Specific TS Changes SR 3 8 1 14 (24-hour DG capability test)
SR 3.8.1.14 (24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> DG capability test)
Current loading band for 2-hour portion revised from 2600 kW and 2860 kW to 2750 kW and 2860 kW
Minimum load band value is an exception to RG 1.108 Rev 1 Position C 2 a (3) to test at load equivalent to 2-hour rating Position C.2.a.(3) to test at load equivalent to 2-hour rating (3000 kW)
Minimum load band value bounds DG loading at maximum 60 8 Hz/4400 V (worst case steady-state accident load) 60.8 Hz/4400 V (worst case steady-state accident load)
Maximum load band value is unchanged, corresponds to 110% of continuous DG rating, allows for immediate retest 32
Specific TS Changes SR 3 8 1 14 (24-hour DG capability test)
SR 3.8.1.14 (24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> DG capability test)
Current loading band for 22-hour portion revised from 2340 kW and 2600 kW to 2680 kW and 2750 kW
Minimum load band value bounds maximum DG loading after 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at maximum 60 8 Hz/4400 V (worst case steady-state 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at maximum 60.8 Hz/4400 V (worst case steady-state accident load) 33
Specific TS Changes SR 3 8 1 14 (24-hour DG capability test)
SR 3.8.1.14 (24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> DG capability test)
Current PF revised from 0.87 to 0.84 to bound DG load analysis minimum power factor of 0.848 y
p Consistent with STS, note is added that if grid conditions do not permit, the PF is not required to be met and shall be maintained as close as practicable be maintained as close as practicable 34 34
Specific TS Changes SR 3 8 1 15 (DG hot re-start test)
SR 3.8.1.15 (DG hot re start test)
Current loading band for pre-test DG operation revised from 2340 kW and 2600 kW to 2680 kW and 2750 kW
Meets RG 1.108, Rev 1, Regulatory Position C.2.a.(5) requirements to demonstrate functional DG capability at requirements to demonstrate functional DG capability at full-load temperature conditions 35 35
Specific TS Changes SR 3 8 1 19 (LOOP and Safety Injection)
SR 3.8.1.19 (LOOP and Safety Injection)
Current maximum steady state frequency revised from 61.2 Hz to 60.8 Hz DG loading analyses establish maximum steady state DG loading at a maximum 60.8 Hz/4400 V Current maximum frequency administratively controlled Current maximum frequency administratively controlled 60.5 Hz Instrument uncertainty values included in surveillance test procedures 36
Specific TS Bases Changes TS 3.8.1 Bases Additi f t t t th t DG l d i SR 3 8 1 3 Addition of statement that DG loads in SRs 3.8.1.3, 3.8.1.10, and 3.8.1.14 that no instrument uncertainties for load included in surveillance procedures p
DG loads are not modeled in accident analyses DG loads are limited by vendor ratings (define maintenance intervals) intervals)
Instrument uncertainty for DG load displayed by digital meters on the control room vertical board = 90 kW Applying 90 kW uncertainty to each side of test load band Applying 90 kW uncertainty to each side of test load band adds 180 kW and could unnecessarily operate DG above rated values 37 37
Specific TS Bases Changes TS 3.8.1 Bases Additi f t t t th t DG l d i SR 3 8 1 3 Addition of statement that DG loads in SRs 3.8.1.3, 3.8.1.10, and 3.8.1.14 that no instrument uncertainties for load included in surveillance procedures (cont.)
p
(
)
DG load analyses assume simultaneous maximum 60.8 Hz/4400 V, difference in DG loading at nominal frequency (60 Hz) and voltage (4000 V) is 109 kW q
y (
)
g
(
)
DG load analyses assume simultaneous operation of all intermittent loads (77 kW), several of which require operator to start and may not be used y
DG load analyses conservative assumptions are considered to bound instrument uncertainty for load 38 38
Specific TS Bases Changes TS 3.8.1 Bases R
i i f
i t
d t t f
(f Revision of maximum steady state frequency (from 61.2 Hz to 60.8 Hz) for SRs 3.8.1.11 and 3.8.1.19 where DG is fully loaded y
Clarification that requirement for DG steady state frequency for SRs that do not include specific DG loading requirements is 58 8 to 61 2 Hz loading requirements is 58.8 to 61.2 Hz 39 39
Staff Feedback Staff Feedback Staff Feedback 40 40 40