ML16342A365
| ML16342A365 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 01/14/1994 |
| From: | Townsend J PACIFIC GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML16342A366 | List: |
| References | |
| NUDOCS 9401250079 | |
| Download: ML16342A365 (10) | |
Text
ACCELERATED DI, RIBUTION DEMONS WTION SYSTEM REGULATORY INFORMATION DISTRXBUTION SYSTEM (RIDS)
ACCESSXON NBR:9401250079 DOC.DATE: 94/01/14 NOTARIZED: NO DOCKET FACIL:50-275 Diablo Canyon Nuclear Power Plant.,
Unit. 1, Pacific Ga 05000275 50-323 Diablo Canyon Nuclear Power Plant, Unit 2, Pacific Ga 05000323 AUTH.NAME AUTHOR AFFILIATION TOWNSEND,J.D.
Pacific Gas
& Electric Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Forwards MOR for DCNPP Units 1
& 2 for Dec 1993
& revised Unit 1 Operating Data Repts for May,June, July
& Aug 1993.
Revisions correct errors in Gross Thermal Energy (MWH) data.
DISTRIBUTION CODE:
IE24D COPIES RECEIVED:LTR Q ENCL J SIZE:
TITLE: Monthly Operating Report (per Tech Specs)
NOTES:
D RECIPIENT ID CODE/NAME PDV PD INTERNAL: ACRS AEOD/DSP/TPAB NRR/DRIL/RPEB RGN5 EXTERNAL: EG&G BRYCE,J.H NSIC COPIES LTTR ENCL 1
1 10 10 1
1 1
1 1
1 1
1 1
1 RECIPIENT ID CODE/NAME PETERSON,S AEOD/DOA OEAB EG LE 01 NRC PDR COPIES LTTR ENCL 1
1 1
1 1
1 1
1 1
1 D
D R
D NOTE TO ALL"RIDS" RECIPIENTS:
D D
PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 2%79) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 21 ENCL 21
0 I
Pqcific Gas and Electric Company Diablo Canyon Power Plant PO. Box 56 Avita Beach, CA 93424 805/545-6000 John D. Townsend Vice President-Diablo Canyon Operations and Plant Manager January 14, 1994 U.S. NUCLEAR REGULATORY COMMISSION Attention: Document Control Desk Washington, DC 20555 RE:
Docket No. 50-275 and 50-323 License No. DPR-80 and DPR-82 Monthly Operating Report for December 1993 GENTLEMEN:
Enclosed is the monthly operating report for Diablo Canyon Units 1 and 2 for December 1993.
This report is submitted in accordance with Section 6.9.1.7 of the Units 1 and 2 Technical Specifications.
Also attached are updated Unit 1 Operating Data Reports for the months of May, June, July, and August 1993.
These reports have'been updated to correct errors in the Gross Thermal Energy QVPWH) data.
Sincerely, JDT:pgd Enclosures 940i250079 9401i4~:
PDR '"ADOCK'05000275 R"
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CC:
Mr. Kenneth E. Perkins, Acting Regional'Administrator U.S. Nuclear Regulatory Commission, Region V 1450 Maria Lane, Walnut Creek, CA 94596-5268 Ms. Liz Hannon, President UtilityData Institute, Inc.
1700 K Street, NW, Suite 400 Washington, DC 20006 INPO Record Center 1100 Circle 75 Parkway Suite 1500 Atlanta, GA 30339 Ms. Sheri Peterson U.S. Nuclear Regulatory Commission One White Flint North Mail Stop 13 E16 Washington, DC 20555 Mr. Paul Krippner Towne Center, Suite 300S 29 South Main Street W. Hartford, Connecticut 06107-2445
I
MONTHLYNARRATIVEREPORT OF OPERATION AND MAJOR MAINTENANCEEXPERIENCE This report describes the operating and major maintenance experience for the month of December 1993.
This narrative report was prepared by the Plant Staff and is submitted in accordance with Section 6.9.1.7 of the Units 1 and 2 Technical Specifications.
Narrative of Dail Si nificant Plant Events On December 1, 1993:
Unit 1 and Unit 2 started the month in Mode 1 (Power Operation) at 100% power.
On December 2, 1993:
Unit 1 reduced power to 50% for intake screens drive repair, intake conduit and 1-1 Circulating Water Pump (CWP) discharge tunnel cleaning.
On December 7, 1993:
Unit 1 returned to 100% power.
On December 11, 1993:
Unit 2 reduced power to 50% for condenser cleaning.
On December 12, 1993:
Unit 2 returned to 100% power.
On December 15, 1993:
Unit 2 reduced power to 50% for leak repair of the inlet water box upper
- manway, scraping of the CWP 2-2 discharge
- tunnel, cleaning of the service cooling water heat exchanger 2-2 and intake screens repair.
On December 16, 1993:
Unit 1 reduced power to 50% for condenser cleaning.
On December 17, 1993:
Unit 1 returned to 100% power.
Inverter IY-22 was taken out of service, TS 3.8.2.1 Action b. was
- entered, and inverter PY-22 was placed on back-up power due to an undervoltage transient which occurred on Inverter IY-22 causing multiple control room alarms.
All instrumentations immediately returned to normal followingthe transient.
The final maintenance, adjustment, and load testing ofthe inverter necessary to declare it operable could not be completed within the TS 3.8.2.1 24-hour action statement.
Therefore, enforcement discretion was requested and granted for an additional 8-hour period to complete these activities and avoid a plant transient associated with shutdown and restart.
On December 19, 1993:
Unit 2 returned to 100% power.
On December 26, 1993:
Unit 1 experienced a turbine/reactor trip caused by a system disturbance and generator excitation transducer drift.
The generator excitation protection transducer was replaced.
A 10CFR50.72 (b)(2)(ii) non-emergency four-hour report was made for a Unit 1 reactor trip. For more information see LBR 1-93-011.
On December 30, 1993:
A 10CFR50.72 (b)(1)(ii)(B) non-emergency one-hour report was made regarding a condition potentially outside design basis of the plant.
The AuxiliarySalt Water/Component Cooling Water (ASW/CCW) heat exchangers for both units may have had sufficient fouling to have precluded the CCW system from meeting its design basis.
This condition may have existed at various dates prior to and subsequent to August 23, 1990, up until continuous chlorination was fullyimplemented in the ASW system, in October 1992. For more information see LER 1-93-012.
On December 31, 1993:
Unit 1
ended the month in Mode 2 (Startup) at 0% power returning to 100% power and Unit 2 ended the month in Mode 1 (Power Operation) at 100% power.
Summa f Plant 0 eratin Characteristics Power Reducti n
and Unit Shutdown Unit 1 operated this month with a unit availability factor of 82.58% and a unit capacity factor (using MDC Net) of 74.37%.
Unit 1 reduced power by more than 20% for more than four hours three times this month for: (1) intake screens drive repair and 1-1 Circulating Water Pump (CWP) discharge tunnel cleaning; (2) condenser cleaning; and (3) a reactor trip due to a disturbance on the electrical grid and generator excitation transducer drift.
Unit 2 operated this month with a unit availability factor of 100.0% and a unit capacity factor (using MDC Net) of 93.27%.
Unit 2 reduced power by more than 20% for more than four hours twice this month for: (1) condenser cleaning; and (2) repair of a leak on the inlet water box upper manway, scraping of the CWP 2-2 discharge tunnel, cleaning of the service cooling water heat exchanger 2-2 and intake screens repair, Summa of Si nificant Safet Related Maintenance Significant safety related maintenance for Unit 1 consisted of:
1.
FCV-22, Main Steam Isolation Bypass Valve (MSIV) position switch repair.
2.
LCV-460 letdown isolation valve repair.
Significant safety related maintenance for Unit 2 consisted of:
The Ferro-magnetic transformer was replaced in inverter 2-2.
Actuation of Steam Generator Safet or Pressurizer Power crated Relief Valve There were no challenges to the steam generator safety valves or the pressurizer power operated relief valves.
r J