ML20148E723
| ML20148E723 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 03/21/1988 |
| From: | Gucwa L GEORGIA POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| SL-4277, NUDOCS 8803250293 | |
| Download: ML20148E723 (4) | |
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Georg a Power Company 333 Ped: rat Avenue
- Manta, Georg a 30308 Teephone 404 526-6526 Ma&ng Address:
Post Ottce Box 4545 Manta. Georga 30302 Georgia Power L.T.Gucwa MP SWU f*WC 42"
Manager Nuclear Sa'ety and Lcensng SL-4277 0812m X7GJ17-V120 March 21, 1988 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Hashington, D.C.
20555 PLANT V0GTLE - UNIT 1 NRC DOCKET 50-424 OPERATING LICENSE NPF-68 REPLY TO A NOTICE OF VIOLATION Gentlemen:
In accordance with the provisions of 10 CFR 2.201, Georgia Pcver Company (GPC) submits the enclosed information 19 response to NRC Inspection Report 50-424/88-06 which concerns the inspection conducted by Mr.
P.
T.
Burnett of the NRC Region II staff on January 12-13 and January 25-29, 1988.
A copy of this response is being provided to the NRC Region II office for review.
In the enclosure, transcription of the NRC violation precedes GPC's response.
Should there be any questions in this regard, please contact this office at any time.
Sincerely, f&
L. T. Gutwa JAE/Im
Enclosure:
1.
Violation 88-06-01 and GPC Response c:
(see next page)
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8803250293 880321 PDR ADOCK 05000424 O
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GeorgiaPower A U. S. Nuclear Regulatory Commission March 21,11988 Page Two c: Georaia Power Comoany Mr. P. D. Rice
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Mr. G. Bockhold, Jr.-
.GO-NORMS U. S. Nuclear Regulatory Commission Dr. J. N.-Grace, Regional Administrator Mr. J. B. Hopkins, Licensing Project Manager, NRR (2 copies) 4 Mr. J. F. Rogge, Senior Resident Inspector-Operations, Vogtle i
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~ Georgia Power d s
ENCLOSURE PLANT V0GTLE - UNIT 1 NRC DOCKET 50-424 l
OPERATING LICENSE NPF-68 NRC NOTICF '.F VIOLATICN 88-06-01 AND GPC RE90NSE VIOLATION 50-424/88-06-01 "10 CFR 50, Appendix B, Criterion V, and the licensee's accepted quality assurance program, Final Safety Analysi' '.eport Section 17.3.5, require that activities important to safety, ' ch as surveillances performed using data logged or calculated by the plant computer, be accomplished in accordance with instructions and procedures appropriate to the circumstances.
Administrative Procedure (AP) 00410-C (Revision 2),
Computer Software Control, established controls for computer software important to safe and reliable plant operation.
Contrary to the
- above, AP 00410-C did not establish controls over-supplied (sic) constants, which are distinct from the controlled 4
programmer-supplied constants.
As a
consenuence, on or about Dece*2er 10, 1987, the PROTEUS computer data bast 1 accessible constants was changed to include a non-conservative substitute value for blowdown flow.
In the event of a failure of a blowdown flow measuring channel, power indicated at computer point Ull18 would have been lower than the actual power level.
The unit is operated based upon the display value of Ulll8 in accordance with Standing Order 1-87-70.
U1118 is a'so used in Surveillance Procedure 14030-1, Power Range Calorime tr', c Channel Calibration.
This is a Severity Level IV violation (Supplement I)."
RESPONSE TO VIOLATION 50-424/88-06-01 AL ission er denial of alleged violation:
The violation occurred.
Reason for the violation:
The violation occurred due to a procedure inadequacy in that Procedure 00410-C, Rev.
2.. "Computer Sof tware Changes," did not contain provisions to control data base constants changed by plant personnel.
0812m E-1 03/21/88 SL. 4277
k Georgia Power h ENCLOSURE (Continued)
NRC NOTICE OF VIOLATION 88-06-01 AND GPC RESPONSE Congtive steDs Which hau_been taken and the results achieved:
.q Corrective actions taken included the following:
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- 1) By the end of the NRC inspection, steps were taken to change the aefault value of blowdown flow from 90 gpm to 0 gpm prior to the restart of Vogtle Unit 1, and l2) To prevent unreviewed or unauthorized changes to the data base constants used in the calculation of U1118 (computer monitoring data point), the access level to these data base constants was changed to T
the highest level (Level 8) on December 18, 1987.
Since that time,
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only the computer engineer has had access to the data base for constants affecting U1118.
Corrective steos which will be taken to avoid further violations:
Procedere 00410-C will be revised to include a review of "given data" for accutacy and to provide control of user-speci fi ed constants.
In
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addi tion, Procedure 50015-C, Rev. O, "Engineering Control and Processing i,
J.,bmpu ter Software Chat,ges," will be written to implement Procedure 0041C-C.
i Date_when full como11ance will be acMay_ejl Full compliance is scheduled to be achieved on May 1,
1988 when procedures 00410-C and 50015-C are expected to be fully implemented.
08'Im E-2 03/21/88 SL-4277
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