ML20129F990
| ML20129F990 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 10/06/1992 |
| From: | Skinner P NRC |
| To: | Ebneter S NRC |
| Shared Package | |
| ML20129F106 | List:
|
| References | |
| FOIA-94-208 NUDOCS 9610070081 | |
| Download: ML20129F990 (42) | |
Text
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t October 6, 1992 !
Memorandum To: Mr. Stewart Ebneter !
Through: E. Merschoff From: Pierce H. Skinner
Subject:
Analysis of . EDG Information Provided By GPC in the l Original and Revised . Responses to LER 90-06 and the !
Confirmation of Action Letter Associated with Vogtle i Site Area Emergency of March 20,1990 i
'I.was recently requested to review the subject material to attempt to determine the significance of the differences in the information j provided. The following is a sununary of my analysis: ;
- 1. LER 90-06, Rev.0 - This identified that EDG 1A and 1B had been started at least 18 times each subseauent to the test crocram' and no failures or problems occurred during any of these starts.
NOTE: " Starts" used in this context, were a start of the DG for any reason.
- 2. LER 90-06, Rev. 1 provided clarification of information related to the number of successful starts as discussed in i I
Rev. 0 of the LBR and the GPC response to the CAL ' dated 4/9/90.
The cover letter stated that the original LER number.of successful starts included some of the starts that were a part of the test program.
The cover letter also identified that since the l cr-nletion of the test croaram- there had been 10 )
successful starts of EDG 1A and 12 successful starts of l EDG 1B as of 4/19/90.
-. Additionally the cover letter provided information that identified that information was added to address VALID-
. testing,as defined in RG 1.108. This data covered.the ;
period from 3/21/90 through 6/7/90.
I. visited Vogtle 9/23/92 and 9/24/92.- During that period I
. reviewed the data associated with DG 1A and DG 1B for the period between 1/1/89 through 1/1/91. The following is a compilation of-this data:
Information in this record was deleted ;
in accordance with the r edom of Information -l Act, exe F0IA
-2 N 9610070081 960827
^PDR FOIA f
4 i
COLAPIN94-208 PDR i. j
EDG 1A From 1/1/89 through 1/1/90 No Valid Failure occurred test frequency was every 31 days 21 start attempts occurred 16 valid tests
- 5 non valid test (3 of the test were classified as non '311d ,
failures - 1 due to spurious HJWP,-1 due to no NSCW available, and 1 due to a barring pin out of position)
NOTE: I did not do an investigation into the non valid failures at this time.
From 1/1/90 through 3/19/90 No valid failures occurred
- Test frequency was every 31 days 17 start attempts occurred 8 valid tests 9 non valid tests From 3/19/90 through 4/9/90 2 valid failures occurred on 3/20/90 test frequency was increased to every 7 days 31 start attempts occurred 6 valid tests 25 non valid tests (22 of these were a part of the test program which complete on 3/31/90) j l
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! From 3/19/90 through 4/9/90 I - No valid failures
! - test frequency every 31 days i - 29 start attempts i
- 2 valid test
- 27 non valid tests ( jarformed during test program i and during maintenance)
)
From 4/9/90 through 12/31/90
- 2 valid failures occurred - 1 on 5/23/90 due to newly l
installed HJWT sensor -
1 due to i
' sticking air start valve test frequency - 31 days - (4/10/90 to 5/23/90)
- 7 days - (5/23/90 to 11/15/90)
- 31 days - (11/.5/90 to 12/31/90)
,1
! - 65 start attempts occurred 1
j - 40 valid test
- 24 non valid test i
clarif this j I have included 5 attachments to this memo to RG 1.108.
- information. Enclosure 1 is a 2
l l
Enc osure 4 is a chart I showing 1A and 1B testing from 1/1/89 through 6/7/90.
Enclosure 5 is a chronology of EDG information associated with EDG 9
1A that was developed based on information received and generated by NRC.
}
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~<m- ,- , r. . , - _
'o From 4/9/90 through 12/31/90
- 1 valid failure occurred on 8/29/90 due to voltage regulator
- test frequency - 7. days (4/9/90 to 6/27/90)
- 31 days after 6/27/90 l
- 49 start attempts occurred 34 valid test ,
- 14 non valid test
( 3 non valid failures) l EDG 1B l From 1/1/89 through 1/1/90 l 1 valid failure occurred (This was as the result of a l regulator problem)
- Test frequency was every 31 days
- 19 start attempts occurred
- 17 valid test
- 2 non valid test ( 1 was due to an airdueleak to on the intercooler and the other was the operator shutting down the DG due to various annunciator alarms)
- This DG had had 4 valid f ailures in the last 100 valid tests as of 12/6/89 From 1/1/90 through 3/19/90 No valid failures
- test frequency every 31 days
- 10 start attempts occurred
- 4 valid test
- 6 non valid tests (one due to a failed turbo oil pressure switch sensor and five during maintenance)
usu . (-
Pierce H. Skinner ,
cc: File L. Robinson, OI '
J. Vorse, OI L. Reyes L
ENCLOSURE 1 MYt1/4
" E ini. c
/g... U.S. NUCLEAR REGULATORY COMMISSlofd August 1977
$a 'REGULATORYGUIDE
... OFFICE . . . , OF STAN. .%
. . . DARDS DEVELOPMENT '
' RE4dLATORY QUIDt 1.108 Penloolc test N4 oF plesat. maNERATOR UNITS
- usto As ONSitt ELtCTRIC POWER SYSTEMS' AT N. UCLEAR POWER PLANTS .
i
~ A. INth06UCTl0N ';p .
features if a loss of offeite power and an accident oc.
eut during the same time period and (2) to provide
. Criterion XI, " Test Control." ~ of Appendit B. power to equipment needed to maintain the plant in a
" Quality Atoutanet Critetle' fot Nuciedt: Power aare condition if an eatended loss of offsite power oc-Plants and Fuel Reproce86 tag Plants."'to 10 CFR curs. Didel generator' units are the most common Part 50, " Licensing of Production and Utilization source of onsite electric power.
i '
Facilities." required that a test program be es.
tablished to ensure that systems and components per. High reliability must be designed into the diesel form satisfactotily and that the test pt6 gram include generater units and tnalntained throughout their ser.
operational tests during nucleet po*et plant dperi- vice lifetime by approptlate testing. maintenance, and h0"- operating programs. Branch Technical Position
. . EICSB 2. " Diesel-Generator Reliability Qualifica-Criterion 17. .. Electric Power Systems...of Appen- tion Testing." dated 11/24/75. of the Standard din A. General Design Criteria for Nuclear Power Review Plan (Appendia 7-A of NUREG 75/087')es-Plants." to 10 CFR Part 50 requires that onsite tablishes a reliability goal of 0.99 (at a nominal 50%
- electric power systems have sufficient independence, confidence level) and an acceptable qualification capacity. redundancy, and testability to perform their testing program for diesel generator units of a type or safety functions, assuming a single failure. size not previously used as standby emergency power s urces in nuclear power plants. The preoperational Criterion 18. " Inspection and Testing of Electric and periodic testing provisions set forth in this guide Power Systems." of Appendix A to 10 CFR Part 50 ,
have been designed to provide a basis for taking those requires that electric power systems important to c rrective actions needed to maintain high mservice safety be designed to permit appropriate periodic in- reliability of installed diesel generator units. In addi-spection and testing to assess the continuity of the ,
ti n, the data developed will provide an ongoing systems and the candition of their components. demonstration of performance and reliability for all This tegulatory guide describes a method accep- diesel generator units after installation and in service.
table to the NRC staff for complying with the Com, Reliability objectives concerning the entire onsite mission's regulations with regard to periodic testing electric power system's probability of failure depend of diesel electric power units to ensure that the diesel on the interconnections among the system s,compo- ,
- nents and are not within the scope of this guide.
electric power systems will meet their availability re-
- quirements. The Advisory Committee on Reactor " Failure" is taken here to mean the failure to atstt. ,
accelerate, and assume the design-rated load within Safeguards has been consulted concerning this guide and has concurred in the regulatory position. and for the time prescribed during an emergency or a valid. test. <
B. DISCUSSION
' NUREG 75/Os1. " Standard Review Plan for the Revee= of The purposes of onsite electric power systems are Safety Analys,s Reports for Nuclear Power Plants." U.S. Nuclear (1) to provide power promptly to engineered safety Regulatory Comm..uon. Copies may be purchased from the Nat onal Technical Information Service. Springneld. Virginia
- Lines ind.cate substant..e changes from previous ,ssus , 22161.
USNetC REGULATORY GUIDES
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The testing of the diesel generator unit should also be provided between diesel generator unit testing simulate, where practicable, the parameters of opera- locations and the main control room to ensure that tion (automatic statt, keil bequenting, load 'thell.- the operators at6 cognizant of the status of the unit ding, opetailed timg. 4(c.1 and envitonmehti, under test. 'r ', '
(temperature, huthidity, ete.) that would be espected if actual demand were to be placed on the systern/ - (5) The surveillance system should indicate which of the diesel generator protective trips is ac-This guide provides design and operational provi. tivated first in order to facilitate trouble diagnosis.
sions for the performance of periodic testing of diesel ,
generator units used fot onalte electtle power for .. (6) All diesel generator protective trips should nuclear power plants. A dieaal generator unit" con- be in force during diesel generator unit testing.
sists of the engine, generator. combustion air system. -
cooling water system up to the supply, fuel supply c. Detailed step-by step procedures should be system, lubricating Oli system, starting energy provided for each test under Regulatory Position C.2.
sources, mutostart controis, manual controls, and The procedures should identify those special arrange-diesel generator breaker; ., ,
'~
ments or changes in normal system configuration that must be made to put the diesel generator unit un-C. REGUL.ATORY Postil0N ' der test. Juntpers and other nonstandard configura-
' , tions or arrangements should not be used subsequent
- 1. General to ini.tial equipment startup testing.
a, the design of a diesel terkirdtor uhit 6hould be d. Subsequent to any failure, the cause should be such thet il can accodirnodate dledel generator iesting determined and corrective action taken in a timely as defined in Regulatory P,deltion- 'c.2. manner, with emphasis on preventing reoccurrence of the failure,
- b. Diesel generator ufilli should be flesigned 16 be testable duting operdti6A 6f the huelear p6 wet plant, 2 T" flat as well as while the plhnt is thut down. Thd design should include provisiont to that the testing of the a. iesting of diesel generator units during the units will simulate the planf preoperati6nal test program and at least once (outlined in Regulatory silloh Po$atartieters of C.2) that would be operatioh every 18 months should:
en cted if Attual demand,were tb be placed dn the (l) Demonstrate proper startup operation by .
u" simulaling loss of all s.c. voltage and demonstrate (l) Capability should be prdviddd to test each that the diesel generator unit can start automatically diesel generator unit independently bf fedundant un. and attain the required voltage and frequency within its. Test equipment shobid h61'cause a loss of iti- *eC*Plable limits and time. ,
dependence between redudddht diesel generator uhifs .
or between diesel geherator loiid groupt. (2) Demonstrate proper operation for des.ign.
4 accident-loadmg sequence to design-load require-(2) Testability should be considered in the selec. ments ,and verify that, voltage and frequency are tion and location of instrutnentation lensors and maintamed withm required limits. !
critical components (e.g.,36~v etnot, statting system - I componests). Instrutnentetion tensors should be (3) Demonstrate full-load-carrying capability l for an interval of not lets than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, of which 22 readily eccessible and desigded so that their inspec-tion and calibration can be verified in place. hours should be at a load equivalent to the con-Testability should be considered in selecting critical tinuous rating of the diesel generator and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at a components, and the overall design should include load equivalent to the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> ratmg of the dicsci generator. Verify that voltage and frequency require-status indication and alarm features. ,
ments are maintained. The test should also venfy that (3) Periodic testing of diesel generator units the cooling system functions within design limits.
should not impair the capability of the unit to supply .
emergency power within the required time. Where (4) Demonstrate proper operation dur.mg diesel j necessary, diesel generator unit design should include generator load shedding, including a test of the loss l 1 an emergency override of the test mode to permit of the largest single load and of complete loss ofload, l response to bona fide signals, and verify that the &Bltage teqdirements are met and j that the overspeed limits are not exceeded. !
(4) A surveillance system should be provided ($) Demonstrate functional capability at full-with remote indication in the control toom at to load tempetsture conditions by rerunning the test diesel generator unit status, i.e., under test, ready- phase outlined in Regulatory Positions C.2.a.(l) and standby, lockout. A means of communication should (2) above immediately following (3) above. m 1.108 2 ,
(6) Demon *frate the ability to (a) synchronize C.2.a.(9), the interval for periodic testing under the diesel generator unit with offsite power while the Regulatory Position C.2.c (en a per diesel generator unit is connected to the ernergency load. (b) transfer unit basis) should be no more than 31 days and v this load to the offsite power (c) isolate the diesel should depend on demonstrated performance. If generator unit, and (d) restore it to standby status. more than one failure has occurred in the last 100 tests (on a per nuclear unit basis), the test interval
, (7) Demonstrate that the engine will perform should be shortened in accordance with the following i properly if switching from one fuel oil supply system schedule.: i l to another is a part of the normal operating procedure to satisfy the 7 day storage requirement. (1) If the number of failures in the last 100 valid tests is one or zero, the test interval should be not i (8) Demonstrate that the capability of the diesel more than 31 days. I generator unit to supply emergency power withih the required time is not impaired during periodic testing (2) If the number of failures in the last 100 valid under Regulatory Position C.2.c. tests is two, the test interval should be not more than 14 days.
(9) Demonstrate the tequired reliability by means of any 69 consecutive &alid tests'(per plaht) (3) If the number of failures in the last 100 valid with no failures, with a minimum of 23 or 69/n tests, tests is three, the test laterval should be not more whichever is the larger, per. diesel generator unit than .7 days. -
(where n is equal to the nuinbet of diesel generator units of the same design and size). (4) If the number of failures in the last 100 valid
' tests it four or more, the test interval should be not
- b. Testing of redundant diesel generator units more than 3 days.
during normal plant operation should be performed !
independently (nonconcurrently) to minimize com. e. Valid tests and failutes (under Regulatory
' mon failure modes resulting from undetected in. Positions C.2.a.(9) and C.2.d) should be based on the terdependences smoog diesel generator units, following criteria:
flowever, during reliability demonstrati,on of diesel j generator units during plant preoperational testing (1) All start attempts (automatic, including and testing subsequent to any plant modification those from bona fide signals, or manual) that result in j
, where diesel generatet unit interdependence may a failure to start, except as noted in (2) below, should have 'ocen afTected or every 10 years (during a plant be considered valid tests and failures.
shutdown), whichever is the shorter, A test should be (2) Unsuccessful start and load attempts that conducted in which redundant units are started can definitely be attributed to operating error, to l simultaneously to help identify certain common spurious operation of a trip that is bypassed in the i
failure modes undetected in single diesel generator emergene) operating mode, to lhelfunction of equip-unit tests. '
ment that is not operative in the emergency operating mode (e.g., synchronizing circuitry) or is not part of l
- c. Periodic testing of diesel generator units during the defined diesel generator unit design should not be normal plant operation shduld: considered valid tests o} failures.
(l) Demonstrate propet startup and verify that (3) $decessful starts, including those initiated by the required voltage and frequency are automatically bona fide signals, folid*ed by successful loading (se.
attained within acceptable limits and time. This test quential or manual) to at least $0% of continuous l
, should also verify that the components of the diesel rating and continued operation for at least one hour generator unit required for automatic startup are should be considered valid successful tests.
(4) Successful starts that are terminated inten-(2) Demonstrate fullload-carrying capability tionally without loading, as defined in (3) above, (continuous rating) for an interval of not 'ess than should not be considered valid tests or failures.
' one hour. The test should also verify that the cooling system functions within design limits. This test could (
loadm. 5) Successful g attempt should bestarts followed considered validby anand tests unsuccessful be accomplished by synchronizing the generator with the offsite power and assuming a load at the man- failures, except as noted in (2) above.
imum practical rate.
(6) Tests that are terminated intentionally
- d. After completion of the diesel generator unit before completion as defined in (3) above because of I reliability demonstration under Regulatory Postition an alarmed abnormal condition that would ultimate-ly have resulted in diesel generator damage or failure
-
- val.d em ei derned in nesvi.iory po.iison c.2.e. should be considered valid tests and failures.
1.106 3 .
(7) Tests performed in the process of generator units requires special evaluation, and the l troubleshooting should not IK considered valid tests. information provided m the report form should be !
Tests that are performed to verify correcti on of the supplemented, as nessed, by additional narrative problem should be considered valid tests and succes. material that: -
ses or failures, de appropriate. -
(1) Identifies the reported failure as the 7th or greatet failure in the last 100 valid testa, (8) Cranking and venting procedures that lead to the discovery of conditione (e.g., excessive water or I oil in a cylinder) that would have resulted in the d) Describes corrective measures, taken or failure of the diesel generator unit during test or dur- Pl anned, to increase the reliability of the generator ing response to a bond fide signal should be con. units, sidered a valid test and failure. (3) Provides an assessment of the esisting
- 3. Records and Reports ,, reliability of electric power to engineered-safety.
seatute equipment,
- s. All start attempts, including those from bona fide signals, should be logged The los should (4) Provides the licensee's basis for continued describe each oce'urrence in sufficient detail to permit Pl ant operation if th&( la planned, And (
independent determination of HatiMical validity in accordance with Regulatory Position C.2.e. (5) Provides a summary or allients (valid and in.
Maintenance, repair, and out of service time valid) that occurr'ed within the time period over
- histories, as well as cumulative maintenance and which the last 100 &alid tests were performed, and verifies that surveillence testing during this period opersting data, should also be logged. Cumulative was in conformance with the schedule of Regulatory i statistical analyses of diesel generator unit test results, together with results of operation of the diesel Position C.2.d. l generator unit when required by actual demand, Invalid failures experienced during ' trouble-should be maintained. These analyses should include shooting should be included in the report of the examination of the trend of critical failure failure (valid or invalid) that made the mechanisms, human errors, and common mode troubleshooting necessary.
failures. A
- b. All diesel generator anit failures, valid of in- D. IRgPLElgENTATION valid, should be reported' consistent with the --
licensee's reporting requirements. This report should The purpose of this section is to provide informa-(1) identify the diesel generator unit involved, (2) tion to applicants regarding the NRC stafra plans for identify the failure as being the nth failure in the last using this regulatory guide.
100 valid tests, (3) describe the cause of failure, (4) describe the corrective niessures taken,($) indicate This guide reflects current NRC staff practice.
the length of time the diesel geherttor unit was un- Therefore, except in those cases in which the appli-sveilable, (6) define the cuttent surveillance test inter. cant proposes an acceptable alternative method for val, and (7) verify that the test interval is in confor- complying with the specified portions of the Commis-
- mance with the schedule of Reguletory Position sion's regulations, the method described herein is be-
! C.2.d. If the number of failures in the last 100 valid ing and will continue to be used in the evaluation of
, tests is seven or more, the reliability of the diesel submittals for construction permit applications until thit guide is revised as a result of suggestions from the
- ,',,i a-su Reevistory ovide 1.16 ftspatias of operatias public orfato,. additional staff review.
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' Notes: "
- 1. In LER 90-06, GPC identified that both DG1A and DG1B had started at least 18 times each with no failures or problems.
Rev. I changed this to 12 y.3114 tests with 1 failure on DG1B and 16 valid tests on DGIA with no failures.
2.
LER 90-06 addressed a successful test of DG1A via an undervoltage start without air roll.
This statement was not in the revsed LER. (This test was performed -why they removed it in the revision is unt own.)
- ~. -
~s 5.
In the corrective actions addressed in revision 1 GPC identified starts.
that DG1A had 4 valid failures in 69 yalid l
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-EDG 1A CHRONOLOGY FOR VOGT*.E ,
DATE REMARKS e
- EDG 1A being tested monthly per TS Feb.- 1990 Vogtle Unit 1 entered 2nd refueling outage 3/1 .3/12 EDG 1A - various maintenance during outage 3/13 (OPERABLE) EDG 1A tested and returned to service j i
3/20 Loss..of offsite power occurs. EDG 1A started and ;
tripped . af ter 1 minute 20 seccnds. Engine was -
restarted and tripped again after 1 minute 10 ;
~
seconds. EDG - was then started in the emergency start condition and ran satisf a: tory - for approx.
4.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />. (See LER 50-424/90-06 and NUREG 1410) ,
3/20 1st failure during SAE 3/20 2nd failure during SAE 3/20 Manual / emergency start for SAE 3/20 (INOPERABLE) After SAE - EDG declared in:perable 3/20 Started EDG 3 additional tires (No problems i observed) j ist -
manual start and tied to bus for aux.
power alignment - 47 minutes 2nd attempt to get EDG to repeat failure - I no load - 5 min.
3rd - as above - 21 min. l I
3/23 EDG 1A started for air system leak test -
12 leaks '
found ;
3/23 EDG 1A ' inadvertently started in lieu of EDG 1B -
Shutdown without being closely monitored within 1 min.
3/29 EDG-1A started for undervoltage testing (simulate LOOP condition as closely as pessible) -
operated i 16 min. and_then was manually stopped.
-(NOTE: GPC correspondence dated E/30/90 shows this start as 50 min.) ,
l EDG ' 1A started for bubble testing
~
3/30 -
EDG tripped l when installation of bubble tester occurred.
I l
_ . . . - _ . _ _ - a
e 3/30 EDG 1A started with test gages installed ( started 4 times) 3/30 - 3/31 Multiple start testing ( 4 times) - no problems observed 3/31 Trip timing testing ( 4 times) 3/31 EDG 1A Jacket water temperature test ( 1 min. run -
rest 19 min. and restart for *. min.)
3/31 EDG 1A jacket water temperature test for 35 min.
3/31 Undervoltage test #2 ( app. J states this was conducted on 4/7) 4/1 Operability test - normal Surveillance Test -
( ASSUMED THAT THIS PLACED THE EDG BACK INTO SERVICE) 4/6 3 starts for jacket water testing ( 1 min., 1 min.
and 10 min. )
4/6 EDG 1A started for LOSP trip modification functional testing - 2.5 hrs.
4/9 EDG 1A started for normal Surveillance testing
- App. J to NUREG 1410 states that after the 6 month
. operability testing, GPC resumed TS testing -
for ist 2 weeks operability testing was conducted i resulting in 6 additional starts.
4/9 GPC Letter dated 4/9/90 - Stated EDG 1A testing Extensive testing of controls and sensor calibration EDG 1A STARTED 18 TIMES WITH NO FAILURES OR PROBLEMS An undervoltage test without air roll was conducted with no problems 4/9/90 Meeting summary for the 4/9/90 meeting with NRC dated 5/4/90 showed a chart that discussed Special Testing of EDG 1A - chart showed 18 SUCCESSFUL STARTS 4/19/90 LER 50-424/90-06, Rev. 0 - identified EDG 1A STARTED AT LEAST 18 TIMES WITH NO FAILURES OR PROBLEMS
o
~
An UV start test without~ air roll was i conducted on 4/6/90 -
started and loaded properly 6/19/90 LER 50-424/90-14 dated 7/19/90 -
Identified that ,
EDG 1A f ailed twice during a surveillance atterpt due to masking tape being installed on the ft:el racks for painting.
6/29/90 LER 50-424/90-06, Rev. 1- identified .
In the cover letter clarified that the j
- previous LER number of starts was erroneous -
the new information states that from the completion of the te'st program (i.e., I st successful test) 10 successful STARTS of EDG 1A had occurred between the completion of the test program and 4/19/90 Under " ROOT CAUSE" -
a change was made to specify that Since 3/20 through 7/7 EDG 1A had received 16 VALID TESTS with no failures Under " CORRECTIVE AC" IONS" -
a statement was made that "Up to and including the 2 VALID i FAILURES on 3/20/90 there were 4 VALID FAILURES in 69 VALID TESTS of EDG 1A."
8/29/90 Special Report 1-90-6 dated 9/24/90 EDG 1A had a valid failure due to erratic
! swings on MVARs 6/4/91 Special Report 1-91-1 -
identified conditions of INVALID FAILURES based on discussions with Region II. These failures had never been previously reported.
- 3/15/89 EDG 1A tripped due to barring device ,
lock pin vibration problem - I attributed to personnel error 6/20/89 EDG 1A r.anually stopped when operators noticed that no NSCW was available to the EDG 8/20/89 EDG'1A stopped due to spurious IL.WT alarm 6/14/90 Inspection Report 90-10 issued - closed LER 90-06, Rev. 0
> i
-7/8/91 Special Report 1-91-3 dated 7/31/91 - E;G 1A experienced a failure due to a failed amplifier t card Inspection Report 90-13 issued - addressed calcon' *
~
7/23/90 .
switches on EDG 1B 9/20/90 Inspection Report 90-17 issued - addressed starting '
air valve problems on all EDGs 10/19 & 10/20 Special Report 1-91-6 dated 11/12/91 - 2 INVALID .
FAILURES of EDG 1A occurred ;
10/19/91 Failure- during testing due to [
manually drooping speed too low causing a trip due to low !
turbocharger lube oil pressure 1
10/20/91 Manually tripped EDG 1A due to an exhaust leak l 10/25/90 Inspection Report 90-20 issued - addressed calcon !
switch calibrations l 11/21/90 Inspection Report 90-25 issued - addressed Part 21 .
on EDG air start valves j 4/16/91 Inspection Report 91-05 issued - addressed LER 91- .
05 transfer relays and Part 21 on air start valves !
t 8/1/91 Inspection Report 91-19 issued - addressed EDG TS l review !
i 10/31/91 Inspection Repore 11-26 issued - addressed Design Change Package a.<iew associated with jacket water temperature trip and EDG shuttle valve modification I 11/1/91 Inspection Report 90-19, Supplement 1 issued -
l addressed ESFAS outages and EDG air quality 1
11/25/91- Inspection Report 91-28 issued - addressed a trip !
on EDG 1B and an unplanned EDG start for 2A and 1A (see IR 91-05) 8/4/92 . Inspection Report 92-13 issued - addressed review I of' IN- 89-87, Disabling of Emergency Diesel 1 Generators by their Neutral Ground-Fault Protection Circuitry
l Case Brief - Plant Vogtle
! False Statements / Conspiracy Re Diesel Generator Reliability For .
Senator Joseph I. Lieberman & Staff l April 29,1993 l
Informatica in this record was deleted in accordance with the freedom 0! Information !
Act, exemptions I ._ ,
F01A- N-8#1
! NRC ,
l Office of Investigations 10 4
- +
.' PRESENTATION OUTLINE INTRODUCTION / PURPOSE BACKGROUND Vogtle Site Area Emergency Complainant / Alleger l
TIME FRAME / CHRONOLOGY t ORGANIZATIONAL STRUCTURE CASE THEORY / VIOLATION FLOW CHART '
SUMMARY
OF VIOLATIONS MAIN PLAYERS
SUMMARY
OF VIOLATIONS VS. TIME DISCUSSION / QUESTIONS
?
SYNOPSIS OF ISSUES i
o i
l l
O i o
NRC Must be able to Rely on Complete and Accurate Information from Licensees
VOGTLE SITE AREA EMERGENCY -
\
March 20,1990 o Vogtle in. Refueling Outage o Switchyard Accident Causes Loss of Offsite Power i o Offsite Power required for Core Heat Removal Systems o Emergency Diesel Generator Fails to Perform :
Until Manually Started After 36 Min. w/o Power o Diese~ l Generator Reliability important for Core !
Heat Removalin Event of Loss of Offsite Power i
i
COMPLAINANT / ALLEGER ALLEN L. MOSBAUGH '
. Formerly Asst. General Manager at Vagtle Employed w/GPC at Vogtle 8/84 - 10/90 Prior Nuclear experience at Plant Zimmer e Graduate of Univ. of Cincinnati, Ohio i Has Made Prior allegation against Vogtle Operations i
Was O1 Confidential Source until fired by GPC for non-consensual audio taping at Vogtle without GPC or NRC knowledge '
Went public with 2.206, Confidentiality terminated Has pending Whistleblower Actions w/ DOL j Volunteered tapes to 01 for review prior to GPC Assisted Ol with many hours of tape review '
1
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i Site Area Confirmation of Action Letter Path Emergency Licensee Event Report Path -
(3/20/90)
J
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t 2.206 Filing GPC Response (4/1/91)
(9 /11/ 9 0)
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. EMERGENCY DIESEL GENERATOR RELIABILITY
! 2-90-020 4
. /9/90 oral presentation re: Successful Starts.
/9/90 COAR letter re: EDG starts w/o failures.
! I i
.l /19/90 LER re: comprehensive test program / starts.
- * /29/90 letter of transmittal to the Rev to 4/19/90 '
! LE ;
4
.( /30/90 letter correcting 4/S/90 COAR letter and LER. ,
.206 Response re: HAIRSTON'S participation in f nce call regarding wording of LER.
x.
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.206 Response re: HAIRSTON'S belief in accuracy of
l
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4/9/90 OaAL Paf5DT.
\ .
BIE5EL ESilE
- NORML 36 MORIN OVUtNAE AND INSPECilGI
- SPECIAL ESTI M M H 3/20Evtar in Ovtanaut 5 3raars, Taoustesnoorsno Senson Catisaarion tosic itsiins E-tm Busett TEstins MutiPLt STAars (14) '
W Rn Test t 6 Monin Run SuavaittAnCt Ditstl OrtnAsta W Rm Test '
Senson CattanArion tosic itsrins E-Run Busett Tr.stins lost Oil DCP Im MutrIPts STAar- (5)
DCP W Run Functional W R m itst 6 Monin $URVEILLAnCE
. DatstL Orenasta H JACKar VArt IUns (3)
DCP W Ron Test la SUCCESSFUL $fARIS 19 $UCCES$FUL STARTS 10
.____-______--______-________-.__.---_-._.-.i
\
m O 4/9/90 C.O.A RESPONSE LETTER i
f Georgia Ponci d U. S. Nuclear Regulatory Commission Region II !
Pace Three
- g. Since March 20, 1990, GPC has performed numerous sensor calibrations (including jacket water temperatures), extensive logic testing, special pneumatic leak testing, and multiple engine starts and runs under various .
conditions. Since March 20, the 1A DG has been started 18 times, and the i 18 DG has been started 19 times. No failures or problems have occurred '
during any of these starts. In addition, an undervoltage start test ;
without air roll was conducted on April 6,1990 and the 1A D/G started and loaded p operly.
l t
_ _ _ _ _ ______-_v___ __ - ____.___ _ ---_ - ---
- _ _ _ - - - - - _ _ - - _ _ _ _ - --a - -- -- ---_ _ r __-- - - --- ----- _ - - - - - _ _ ---- _-
4/19/90 LER i
l l
Numerous sensor calibrations (including jacket water temperatures),
special pneumatic leak testing, and multiple engine starts and runs were performed under various conditions. After the 3-20-90 event, the control systems of both engines have been subjected to a comprehensive test program. Subsequent to this test program, DGIA and DGIB have been started at least 18 times each and no failures or problems have occurred during any of these starts. In addition, an undervoltage start test without air roll was conducted on 4-6-90 and DGIA started and loaded properly.
4 i
. l 6/29/90.REV T0 LER I
The number of successful starts included in the original LER included some of the starts that were part <f the test program. The difference is attributed to diesel start record keeping practices and the definition of the end of the test program.
i
_ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ e . , - , = . r _ ~= .__- - - _---- m, --~, _ y r
- 8/30/99 LETTER CORRECTING C.O.A RESPONSE (4/9) ,
j i
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 considered successful when the DG was started and either ran or was, a start intention- was ally shut down due to testing in progress Our use of the term ' successful" was never, as identified on the attached tables. ( int .
test' in the context of Regulatory Guide 1.108. May start attem to test the DG's IA and 18 using applicable operating procedures. pts These were made i procedures and data sheets do not contain criteria for determining if a start is successful which resulted in daterminations of success which were inconsistent '
with the above definition. Second, an error was made by the individual who perforised the count of DG starts for the NRC April 9th letter.
! i l
l l
O l/41 GPC RESPONSE TO 2.206 l
i 3
The wording was reviewed by corporate and site representatives 1990.
in a telephone conference call late on April 19, Although Mr. Hairston was not a participant in that call, ,
he had every reason to believe the final draft LER presented to him after the call was accurata and complete. .
i 3
4
-,eae. w o .-- . - - + - - + . - - - - , - - - - . __m_--- _ __ _- -
4/1/91 GPC RESPONSE TO 2.206 The June 29, 1990 0755 (Exhibit 18) draft and 1142 draft (Exhibit 19) of the same date are each longer than the preceding draft, accurately describe the substance of the April 9, 1990 lotter and focua on the wording " subsequent to the test program" in the original LER. In both instances, the draft transmittal lotter explains that if the report had stated " subsequent to the ovent," rather than " subsequent to the test program," the LER would have been consistent with the April 9 COAR and the "18" and "19" numbers included in the transparencies provided by GPC to the NRC on April 9. This is a correct statement of fact.
t
MAIN PLAYERS NAME POSITION Mar-Aua '90 POSITION Current HAIRSTON Sr. V-P, Nuc., GPC Same McCOY V-P, Vogtle, GPC Same SHIPMAN GM, Nuc Suprt, SNPCO GM, Vogtle, GPC BOCKHOLD GM, Vogtle, GPC EPRI
- CASH Ops. Supt., Vogtle, Strategic Analysis, GPC GPC, B' ham STRINGFELLOW Lic. Engr., SONOPCO Same MAJORS Lic. Engr., SONOPCO Same GREENE Asst. GM, Pint. Supp Mgr., Nuc. Suppt., ;
Vogtle, GPC SONOPCO BAILEY Mgr. Lic., SONOPCO Same
! FREDERICKS QA Mgr., Vogtle, GPC Ops., Vogtle, GPC RUSHTON Mgr, Lic/ Engr SNOPCO Same BURR Sr Proj Engr SONOPCO Same
_ _ _ _ . _ _ . _ _ _ _ _ _ _ _ _ _ _ _ . _ . _ . _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ , , _ . _ ___.___...--,_ -. ,, . ...~. --
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8 9 v 11 12 13 18&I9 Successful Starts (oral).
Started 18&19 times. No problems or failures ccsoc. with any of these starts (COA Response Ltr). Confusion between succ vs valid starts.
t After complet of comprehen test program at least 18 starts on each iiesel. No problems or failures. (LER) Mistake by Individual who e The difference (between COAR Ltr and LER) is attributed to EDG start record keep'ng practices and defin of end of test program.
(Cover Letter to Rev to LER)
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