ELV-02059, Clarifies 900409 Response to 900323 Confirmation of Action Ltr.Util Made 31 Successful Start Attempts for Diesel Generator (DG) 1A & 29 Successful Start Attempts for DG 1B
| ML20059K130 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/30/1990 |
| From: | Hairston W GEORGIA POWER CO. |
| To: | Ebneter S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CAL, ELV-02059, ELV-2059, NUDOCS 9009210161 | |
| Download: ML20059K130 (17) | |
Text
..
. Georgia Power Compary 4-1.-1 V ;,.,;
333 Piedmont Avenue Atlanta, Georgia 30308 Telephone 4M S26 3195 '
Ma+ng Addressi.
40 Invernew Centor Parkway -
. Post Offee Box 1295 -
Dirrrungham. Alabarfe35?01 Telephone 205 808 5581 August 30. 1990 90 SEP 8 ~ ' P 24$%,em
? W. G. Hairston, all Servor Vce Premdent Nuclear Operaboos '
ELV-02059 0579 Docket No.
50-424 U.; S. Nclear-Regulatory Commission Region.II-101 Marietta Street, N. W;-
Atlanta, GA 130323 ATTN: Mr. S. D. Ebneter
Dear Mr. Ebneter:
V0GTLE ELECTRIC GENERATING PLANT CLARIFICATION OF-RESPONSE TO CONFIRMATION OF ACTION LETTER:
By : letter datad April 9,1990- (ELV-01516), Georgia Power _ Company (CPC)l responded to a Confirmation of, Action. Letter. dated March 23, 1990.
In that letter and. in our meeting notes, GPC reported that'Diuel Generator-(DG)d1A had'been. started 18 times. and DG.'18 had been started 19 times with no failures' or problems between March 20 and April 9,-1990.
Similar information was reported-in
~ Revision 0 of Licensee Event Report (LER)'50-424/1990-006 dated Aprily19, 1990 (ELV-01545). - As reported in ~our telephone: calls to the NRC --we subsequently -
discovered that this information was in error.
In Revision 1 to LER 50-424/1990-006 dated June 29,1990--(ELV-01729),CPC.
attempted to clarify the correct number of DG starts-occurring in'this time period by using regulatory guide terminology'(i.e., valid vs. successful' starts).. This revised LER accurately; reports the number of: valid DG-starts during the. period of March 21 through June 7, 1990. However; durug a recent NRC-inspection;it was pointed out that the revised LER did no'.dequately clarify twe numbers in the April: 9th letter.
The confusion in the April.9th letter and the original LER appear to be the result of two factors.
First, there was confusion in the distinction between a successful start and a valid test.
For the purpose of this letter,f a start was considered successful.when the DG was started and either ran or was intention-ally shut down due to testing in progress, as identified on the attached: tables.
- 0ur use of the term " successful" was never intended to imply
- a " valid successful test" in the context of Regulatory Guide l'.108.
Many start attempts were made
~ to test the DG's IA and lB using applicable operating procedures. These procedurec and data sheets do not contain criteria for determining if ta: start ist successful which resulted in determinations of success which were inconsistent with the above definition. Second, an error was made by the individual;who performed the count of DG starts for the NRC April 9th letter, kl i
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GeorgitiPower A U. S. Nuclear Regulatory Commission ELV-02059-Page 2-The purpose of this letter'is to correct the figures related to.the number of DG-:
- j starts reported in the April 9th letter.
Attached are tables -1~ and.2 which
-summarize the DG starts-for the period indicated.
For DG 1A,-there was a total-l of 31 start attempts and 29 of these attempts were' considered successful-after g
the two failures associated with the March 20 event.
For DG 18 there was a' total of:29 start attempts and 21 of these attempts were considered successful.
Fuc?her, for DG 18 there wereL12 successful sequential' starts.
Sincerely
[04 W. G. Hairston, 11 WGH,III/NJS/gm j
~ Attachments xc:
Georaia Power Comoany-Mr. C. K. McCoy 1
Mr. G. Bockhold, Jr.
i Mr. R. M. Odom 1
Mr. P. D. Rushton i
NORMS U. S. Nuclear Reaulatory Commission Document Control Desk i
Mr. T. A. Reed, Licensing Project Manager, NRR Mr. B.-R. Ronser, Senior Resident Inspector, Vogtle i
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TABLE 1.
l DlESEl. GENERATOR 1A START.
RUN UNPLANNED A._
DAIE
. SUCCESS IJ11E TRIP DISCUSSION 139 03-20-90 No 1 min Yes Failure to maintain load.
q 140 03-20-90 No 1 min-Yes Failure.to maintain load.
141 03-20-90 Yes.
,4'l/2hr No.
_ Nanual start,-load maintained.
142 03-20-S Yes 45 min.No Normal reserve auxiliary-transformer swap method.
143 03-20-90 5' min No Observation run.
j 144 03-20-90
-u.
20 min No.
Observation.run.-
145 03-23-90 Yes 60 min No:
Observation run.
146 03-23;90-Yes-O min No-Started wrong diesel generator.
147 03-29-90.
Yes 50 min No UV. test start #1.-
148 03-30-90 Yes 2 hr Yes*
. Bubble test #1, high.
temperature jacket water' sensor vented.
149 03-30-90 Yes 6 min. No Trip simulation test.
150 03-30-90 Yes 6 min No Trip simulation test.
151 03-30-90 Yes
' 3 min No.
Trip simulation test'.
152 03-30-90 Yes 6 min No Trip simulation test.
t 153 03-30-90 Yes 4 min No Orifice modification '
functional test.
154 03-30-90 Yes 10 min No Orifice modification t
functional-test.
155 03-31-90 Yes 2 min No Orifice modification
. functional test.
156 03-31-90 Yes 3 min No
. Orifice modification functional test.
157 03-31-90 Yes 10 min No Bubble test #2 158.
03-31-90 Yes 1 min No Sensor trip timing. test.
v 159 03-31-90 Yes 1 min No Sensor trip timing.tetc.
160 03-31-90 Yes 2 min No Sensor'tr1p timing test, 161 03-31-90 Yes 1 min No Sensor trip timing test..
162 03-31-90 Yes 75 min No Sensor trip tiining test 163 03-31-90 Yes 27 min No UV test start #2.
164 04-01-90 Yes 1 1/2 hr. No Normal ~ surveillance test..
165-04-06-90 Yes 1 min No Jacket water temperature test.-
l 166 04-06-90 Yes 1 min No-Jacket water temperature test.
16'7 04-06-90 Yes 10 min No Jacket water temperature j;
test.
l i
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+..-
.r
. TABLE 1 (CONTINUED)
DIESEL GENERATOR 1A START RUN UNPLANNED' h__
DAIE SECLU llE E _ -DISCUSSION 168 04-06-90 Yes 2 1/2 hr No.
LOSP trip modification--
functional-test.
-169 04-09-90 Yes 1 3/4 hr. No Normal surveillance test.
- Unit tripped during bubble testing due to one sensor venting and another sensing line being disconnected for testing.. This;is'further described.in NUREG-1410.
j
a TABLE 2 DIESEL GENERATOR lB START RUN UNPLANNED L
DAI[
gicej;3Ji IJE
_ TRIP DISCUSSION 120 03-21-90 No 0 min No Post-maintenance run;. prime fuel-I
-lines.
121 03-21-90 No 0 min No' Post-maintenance run,_ prime fuel l
lines.
122 03-21-90 No 15 min No Post-maintenance run, adjust 1
governor.
123 03-21-90 No 2 min No Post-maintenance run,: fuel oil i
delta pressure high.:
124 03-21-90 No 4 min No-Functional: test run, fuel ~ oil delta pressure high, 125 03-22-90 Yes 6 min No Functional test for maintenance.
126 03-22-90 Yes 1 min -No Functional test for maintenance; 127 03-22-90 Yes 15 minc-No-Post-maintenance overspeed test, q
128 03-22-90 Yes 3 min No Post-maintenance overspeed test, i
129 03-22-90 Yes 5 min-No_
Post-maintenance overspeed test.-
j 130 03-22-90 Yes 5 min -No Voltage' clamp circuit. adjust.
j 131 03-22-90
- Yes 2 min. No Voltage clamp circuit adjust.
j 1'
03-22-90 No 1 1/2'hr.Yes Post-maintenance 1oad test, high-i temperature lube oil trip.' '
133 03-23-90 Yes 7 hr No Post-maintenance _ load test-134 03-23-90 No 3 min -Yes Post-maintenance load ' test, low pressure' jacket water trip, 135 03-23-90 Yes-4-1/2 hr_ No Post-maintenance:loadttest.
136 03-24-90 No*
33 min No Post-maintenance load-test, high temperature jacket water-al arm.
137 03-27-90 Yes 1 1/2 hr No Bubble' test.
. i 138 03-27-90 Yes 42 min No Trip' simulation test.
j 139 03-27-90 Yes 3 min No Trip simulation test.
140 03-27-90 Yes 2 min No Trip: simulation test'.
l 141 03-27-90 Yes 6 min No Trip simulation test.
142 03-27 Yes 57 min No UV test'..
143~-
03-28-90 Yes 1 3/4 hr No-Normal' surveillance 144 03-28-90
.Yes
.4 min, No-Low pressure. lube oil modification functional i
test.
145 03-28-90 Yes 4 min No Low pressure lube oil modification functional test 146 04-04-90 Yes 1 1/4 hr No
' Post-maintenance load test.
147 04-05-90 Yes 5 min No LOSP trip modification functional test.-
148 04-05-90 Yes 2 hr No Normal surveillance.
- High-temperature jacket water trip alarm was received knd the engine kept running.
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