ML20081H333
ML20081H333 | |
Person / Time | |
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Site: | Diablo Canyon ![]() |
Issue date: | 10/28/1983 |
From: | Schuyler J PACIFIC GAS & ELECTRIC CO. |
To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
References | |
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8311070393 | |
Download: ML20081H333 (1) | |
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Category:DEFICIENCY REPORTS (PER 10CFR50.55E & PART 21)
MONTHYEARML17264A9381997-07-10010 July 1997
[Table view]Deficiency Rept Re Potential Safety Hazard Associated w/FM-Alco 251 Engin,High Pressure Fuel tube-catalog: 4401031-2 in Which Dual Failure Mode Exists.Caused by Incorrect Forming Process ML20094M6251995-11-21021 November 1995 Final Part 21 Rept of Investigation & Analysis of Suspect Fasteners Event 29257.B&G-Cardinal Discontinued Using Heat Treatment Equipment at Cardinal Facility Until Such Time That Satisfactory Mods Made to Hardware & Procedures ML20126J5961992-12-31031 December 1992 Part 21 Rept Re Potential Loss of RHR Cooling During Nozzle Dam Removal.Nozzle Dams May Create Trapped Air Column Behind Cold Leg Nozzle Dam.Mod to Nozzle Dams Currently Underway. 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[Table view]Draft,Probabilistic Safety Assessment, Risk Info Matrix, Risk Ranking of Systems by Importance Measure DCL-99-045, 1998 Annual Financial Rept for PG&E Corp. with1998-12-31031 December 1998 1998 Annual Financial Rept for PG&E Corp. with ML20217G5151997-12-31031 December 1997 1997 PG&E Corp Annual Rept ML20205F5881997-07-24024 July 1997 Decommissioning Cost Estimate for Diablo Canyon Power Plant,Units 1 & 2 ML17264A9381997-07-10010 July 1997 Deficiency Rept Re Potential Safety Hazard Associated w/FM-Alco 251 Engin,High Pressure Fuel tube-catalog: 4401031-2 in Which Dual Failure Mode Exists.Caused by Incorrect Forming Process ML18102B6911997-01-31031 January 1997 Monthly Operating Repts for Jan 1997 for Diablo Canyon Power Plant,Units 1 & 2.W/970218 Ltr ML16342D5351997-01-31031 January 1997 WCAP-14826, Instrumentation Calibr & Drift Evaluation Process for Diablo Canyon Units 1 & 2,24 Month Fuel Cycle Evaluation. 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ML20059G6811993-06-30030 June 1993 Revised MOR for June 1993 for Dcnpp Unit 1 ML16342A3671993-05-31031 May 1993 Revised MOR for May 1993 for Dcnpp Unit 1 ML20045D1731993-05-31031 May 1993 Monthly Operating Repts for May 1993 for Diablo Canyon,Units 1 & 2 ML20126J5961992-12-31031 December 1992 Part 21 Rept Re Potential Loss of RHR Cooling During Nozzle Dam Removal.Nozzle Dams May Create Trapped Air Column Behind Cold Leg Nozzle Dam.Mod to Nozzle Dams Currently Underway. Ltrs to Affected Utils Encl ML20141M0471991-12-31031 December 1991 Pge Annual Rept - 1991 ML20086T1001991-12-31031 December 1991 Adequacy of Seismic Margins Assuming Increase in Amplitude of Diablo Canyon Seismic Long-Term Program Horizontal & Vertical Ground Motions Described in Sser 34 ML16341G4871991-11-30030 November 1991 Nonproprietary Technical Justification for Eliminating Large Primary Loop Pipe Rupture as Structural Design Basis for Diablo Canyon Units 1 & 2 Nuclear Power Plants. 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ML20006C6681989-11-30030 November 1989 Nonproprietary WCAP-12416, Evaluation of Thermal Stratification for Diablo Canyon Units 1 & 2 Pressurizer Surge Line. 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,,3 PACIFIC GAS AND ELECTR,IC C'O M PANY IPGel ;
77 BEALE STREET . SAN FRANCISCO. C ALIFORNI A 94106 . {4 87 78 h4f11 ,, W X ,910 - + 07 d.O.SCHUYLER Ccttav ro L. L L R A T *0 4 October 28, 1983 Mr. John B. Martin, Regional Administrator U. S. Nuclear Regulatory Commission, Region V 1450 Maria Lane, Suite 210 ,
Walnut Creek, CA 94596-5368 I Re: Docket No. 50-323 Diablo Canyon Unit 2 i Notification of Defective Snubbers '
l
Dear Mr. Martin:
This letter confirms a telephone call on October 12,1983 at 9:30 AM between Robert A. Young and Charles 0. Coffer of PGandE and Dennis F. Kirsch of NRC Region V. The call reported that the Pacific Scientific Company had notified PGandE of possible defects in snubbers installed or planned for installation at Diablo Canyon Unit 2.
Pacific Scientific has identified possible defects in certain model PSA-3 snubbers, three of which have been installed in Unit 2. A 30-day written report will be submitted in accordance with 10 CFR 50.55(e) that describes the deficiency, analyzes the safety implications, and specifies corrective actions taken.
Sincerely, f . W. -<b v Q L ,. ; ,
J. O. Schuyler 8311070393 831028 PDR ADOCK 05000323 s PDR i 10 16-27