ML20083C940
| ML20083C940 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 04/17/1995 |
| From: | Frederick G GEORGIA POWER CO. |
| To: | |
| References | |
| OLA-3-A-015, OLA-3-A-15, NUDOCS 9505230120 | |
| Download: ML20083C940 (12) | |
Text
, 6D - Ml9'25 - OLt9-3 Gnlq5 0-l6 DOCKETED USHRC Interoffice Correspondence Georgia Power g
9.v_3 n,.m June 29, 1990 GPC EXHIBIT 15 0FFICE OF SECREMg EX. M DOCKE TIE a :;ERViCE MMCH g
Hemo To: George Bockhold. Jr.
General Manager Nuclear Plant-Vogtle N
Subject:
Vogtle Electric Generating Plant - Units 1 & 2 Special QA Audit of Unit 1 Emergency Diesel Generator OP26-90/33 File:
X75G17-P-OP26 Log No:
VSAER-90-159 Audit Scone:
This narrow-scoped audit was conducted at the request of the Manager Safety Audit and Engineering Review.
Its purpose was to investigate the records of the Vogtle Electric Generating Plant Unit 1 Emergency Diesel Generators (EDG's) starts conducted in response to the failure of EDG 1A on March 20, 1990.
This audit reviewed test data sheets generateo during troubleshooting / maintenance testing and surveillance testing as well.as the Unit 1 Shift Supervisor's Log and the Diesel Start Log maintained by the diesel generator systes engineer.
Summary of Problent Found:
o No procedural noncompliances were ideritified.
However, the number of Unit 1A and 18 successful diesel starts (18) identified in License Event Report (LER) 424/90-06 subsenuent to comoletion of the test orocram was determined to be incorrect.
The correct numbers should have been 10 and 12, respectively, using the guidance of the LER.
Evaluation:
The Diesel Generator Start Log was found to be substantially behind with regard to entries and diesel start evaluations.
Substantial delays were found in processing information on diesel start attempts from the Control Room to the diesel systes engineer.
When combined, these items prevented having a single source document readily available that reflected diesel starts and valid tests. The current methodology should be reviewed and revised to remove these problems.
Action: None required.
.k W G. R. Frederick Supervisor - SAER NCM/GRF/btp 9505230120 950417 gDR ADOCK 05000424 PDR
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NUCLEAR REGULATORY COMMISSION f 6 4 2 4.c44 -3 K
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R. P. Mcdonald H. G. Hairston, III C. K. McCoy M. J. Ajluni H. E. Mundy NORMS C. T. Davis G. A. MdCarley J. G. Aufdenkampe, Jr.
Q. A. File M. H. Norton J. E. Swartzwelder l
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f1MiI Plant Vogtle - Units 1 & 2 ACTIVITY Special QA Audit of Unit 1 Emergency Diesel Generator Starts AUDIT NO.
OP26-90/33 DATES AUDITED June 11 through 29, 1990 (non-continuous)
AUDITORS N. C. Mosele:r, Jr., Senior QA Engineer (Audit Team Leader)
G. R. Freder1ck, Supervisor - SAER PRE-AUDIT POST-AUDIT CONTACTS CONFERENCE AUQ11 CONFERENCE T. v. Greene x
N. F. Kitchens x
P. H. Drawdy x
H. T. Pearce x
D. O. Vickery X
S. A. Lockhart x
l F. P. Sharkey x
REFERENCES PROCEDURE REVISION DESCRIPTION 13145-1 21 Diesel Generators 14980-1 19 Diesel Generator Operability Test 55038-C 1
Diesel Start Log PURPOSE / SCOPE The purpose of this narrow-scoped audit, conducted at the request of management, was to verify the testing 'of the Unit 1 Emergency Diesel Generators- (EDG),.
Tha scope, of-. the audit covered, tha.. tast4f.nndurted subsequent to the test program performed in response to the failure of EDG 1A to start on March 20, 1990. The audit consisted of reviewing the test data sheets (surveillance and troubleshooting / maintenance), the Shift Supervisor's Log and the Diesel Start Log maintained by the diesel generator engineer.
The information obtained from these sources was correlated and compared for consistency.
EVALUATION The results of this audit indicate that the tracking of Emergency Diesel Generator starts has been effective within the scope of the audited areas.
The problems noted appear to be the result of slow processing of the test data sheets.
Special QA Audit of Unit 1 Emergency Diesel Generator Starts - OP26-90/33 Page 2 AUDIT DETAILS Shift Supervisor's Log A.
Requirement VEGP Procedure 13145-1 requires that all start attempts be logged in the Unit Shift Supervisor's or the Unit Unit Control Logbook and include the following information:
Start time, reason for start, and success or failure of the start attempt.
8.
Results The Unit 1 Shift Supervisor's (S/S) Log was reviewed for the time period March 20 through June 12, 1990. All entries that identified the starting (automatic or planned) of either EDG 1A or 18 were noted.
The level of detail recorded in the S/S Log book varied.
For some EDG starts the start and stop times were logged as well as a notation as to the results (successful,
- failure, valid, non-valid, tripped, etc.).
For other starts, the only notation was that a surveillance test had been authorized or that a surveillance task sheet had been reviewed and determined to be satisfactory.
Comparison with the other sources of information (test data sheets and Diesel Start Log) determined that in addition to some entries not being complete as noted above, not all EDG starts had been logged in the S/S Log.
(See Attachments A & 8 for comparison data).
As the other sources provided more complete documentation of each EDG test, the Unit Control Log was not reviewed to determine if the referenced requirement had been met.
The redundant requirement may need to be reviewed to determine if it serves a useful purpose or is merely a burden on the Control Room staff.
II.
Serve 111ance Testing (14980-1)
A.
Requirement VEGP procedure 14980-1 requires that the pertinent data be entered on
" Completion Sheat 1"
whenever the procedura is used to demonstrate the operability of the EDG's, 8.
Results Completion sheets from procedure 14980-1 for the subject interval (3/20/90 to 6/12/90) were reviewed in the Document Control Vault on 6/12/90.
Additional completion sheets were reviewed on 6/29/90.
Some difficulties were encountered in retrieving the data sheets from the vault.
Some were flied under various surveillance task numbers (14890-101. -102,...-112) and others were filed under just the procedure number (14980-1). The information from these sheets i
(see Attachments A & 8) was taken from the Diesel Generator Start Evaluation and Comments sections.
-=
. -.-..._ - _-=
Special QA Audit of Unit 1 Emergency Diesel Generator Starts - OP26-90/33 Page 3 III. Troubleshooting / Maintenance Testing (13145-1)
A.
Requirement VEGP Procedure 13145-1 requires that pertinent data be entered on
" Completion Sheet 1" whenever the procedure is used for testing the EDG's.
B.
Results Completion sheets from 13145-1 for the subject interval (3/20/90 to 6/12/90) were reviewed in the Document Control Vault on 6/12/90.
Some difficulties were encoun*ered in retrieving the completion sheets.
Seventeen completion sheets, for tests performed on April 6 May 23, and May 24, 1990, could not be retrieved on June 12,
'1990.
The sheets were, however, retrieved and reviewed on June 29, 1990.
The information from these sheets (See Attachments A & B) was taken from the Diesel Generator Start Evaluation and Comments sections. As identified on the Attachments, a complete evaluation of the start was not always indicated (some dLd not indicate j
success or failure of the start and others did not indicate a valid or non-valid test).
IV.
Diesel Generator Start Log (55038-C)
A.
Requirement VEGP procedure 55038-C requires that the results of all EDG tests performed under procedures 13145-1 and 14980-1 be recorded in the i
Diesel Start Log.
B.
Results The information recorded in the Diesel Start Log was reviewed and compared with the information obtained from the review of 13145-1 and 14980-1 data sheets (see Attachments A & B for results).
The Diesel Start Log was determined to contain entries for a11 13145-1 and 14980-1 data sheets that were reviewed for the subject time period. The two entries in the S/S Log (ref. Attachment B) on May 15 and Ma>y,23mthat doi not have correspondl+entri.es,.iam tha. Diesel start Log were determined to be log entry errors in the S/S Log based on EDG run hours and the lack of data sheets (13145-1 or 14980-1).
V.
Results A.
The number of successful starts (18) without problems specified in LER 424/90-06, dated April 19, 1990 was determined to be incorrect.
Applying the criterit of subsmauent to canaletion of the test nrooram.
the first successful start performed using procedure 14980-1,
" Diesel Generator Operability Test,"
was counted.
Through April 19, 1990, 10 successful starts were made on the Unit 1A diesel and 12 successful starts were made on the Uatt
Special QA Audit of Unit 1 Ezergency Diesel Generator Starts - OP26-90/33 Page 4 18 diesel.
It should be noted that successful is not meant to imply a " Valid" start using regulatory criteria.
Based on i
evaluations made by the responsible diesel system engineer, 7 valid starts were made on both the 1A and 18 diesel subseauent to canaletion of the test nroaram and through April 19, 1990.
As discussed in the audit dotatis above; entries in the Diesel Generator Diesel Start Log were confirmed during the audit by independent verification using several sources.
No specific cause for the error in the LER number of 18 starts was l
identified.
However, it appears the major problem was that on i
April 19,1990, when the LER was prepared, the Diesel Generator Start Log had not been updated.
Based on a review of the log, no entries were made in the Unit 18 diesel Log between March 15 and May 2,1990;' no entries were made in the Unit 1A Diesel Log between i
March 16, 1990, and May 2, 1990.
Therefore, no single source document was readily available for determining the results of diesel start attempts following the Site Area Emergency March 20, i
l 1990, and prior to submittal of the LER April 19, 1990. Also, it appears that confusion about the specific point at which the init nroaram van comolated exists.
Therefore, successful starts made during the test program were counted.
As discussed in the audit details, the data sheets from procedures 13145-1 and 14980-1 are used by the system engineer when completing the start log.
Substantial delays were.noted in processing these forms.
In some cases, 24 days passed from the diesel start attempt until the form was sent to the system engineer (March 31,1990 to April 24, 1990).
Because of the rout 1H delays and the unknown location of-the forms during that interim period, an individual attempting to identify diesel starts would not know if a complete set of sheets was accumulated.
As noted above, the diesel start log was not up to date when the LER was submitted.
8.
The Unit 18 diesel start log was again updated June 6,1990, however, through June 28, 1990, no additional entries have been made in the Unit 1A Diesel Generator Start Since the system engineer makes the determination on "Va id"
- starts, his determination was used to count the valid starts through June 7, 1990 AChca. r-letion of the tant nroaram-The. results were 10 on the Unit IA diesel and 11 on the 18 diesel.
However, the 1
auditors identified several additional successful starts performed in accordance with procedure 14980-1, " Diesel Generator Operability Test."
It appears that through June 7,1990, the Unit IA diesel will have had 16 valid starts and the 18 diesel will have.had 12 i
valid starts.
VI.
Recommendations j
The error introduced in the LER appears to be the result of incomplete documentation.
It was determined that on the date of the LER submittal, entries in the Diesel Generator Start Log were not up-to-date.
Additionally, data forms generated by the Control Room during each start i
had not been processed.
.Special @ Audit of Unit 1 Energency Diesel Generator Starts - OP26-90/33 Page 5' i
It also appears that the current methodology of forwarding data forms to
'the diesel system engineer has several processing delays.
Procedure 55038-C. " Diesel Start Log," does not contain specific guidance on timeliness in making entries and thus an up-to-date log does not exist.
The system engineer indicated he typically updates - the log monthly.
l During the period of frequent starts monthly updates were inappropriate.
o The methodology for logging and determining "Valld" diesel starts should be changed or more specific requirements for maintenance of the Diesel Generator Start Log developed, o
It is also recommended that the need for redundant entries made in the Shift Supervisor's Logs and Unit Control Room Logs be reviewed. Since many entries in the SS log were either incomplete or missing, it provides little benefit as a source document with regard to diesel operations.
OPEN ITEMS From previous audits: None.
From this audit:
None.
POST-AUDIT CONFERENCE No post-audit conference was held.
Individual management personnel were briefed on the results of this audit.
,/[
d N. C. Mose r.
G. R. Frederick Senior @ En ineer Supervisor - SAER l
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