IR 05000361/1997008
| ML20149G297 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 07/18/1997 |
| From: | Howell A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| 50-361-97-08, 50-361-97-8, 50-362-97-08, 50-362-97-8, NUDOCS 9707230106 | |
| Download: ML20149G297 (3) | |
Text
July 18, 1997
SUBJECT:
NRC INSPECTION REPORT 50-361/97-08;50-362/97-08
Dear Mr. Ray:
Thank you for your letter of June 20,1997, in response to our letter and Notice of Violation dated May 23,1997. We have reviewed your reply and find it responsive to the i
concerns raised in our Notice of Violation. We will review the implementation of your corrective actions during a future inspection to determine that full compliance has been achieved and will be maintained.
Sincerely, ll l
k A'rthur T. Ho eli Ill, Director Division of Reactor Safety
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Docket Nos.: 50-361;50-362 License Nos.: NPF-10; NPF-15 l-cc:
Chairman, Board of Supervisors
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County of San Diego 1600 Pacific Highway, Room 335 San Diego, California 92101 Alan R. Watts, Esq.
Woodruff, Spradlin & Smart 701 S. Parker St. Suite 7000
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Orange, California 92868-4720 hk,hkk,hk
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Southern California Edison Co.
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"E" = Copy with enclosures "N" = No copy RIV:MB C:MB D:DRP l
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Southern California Edison Co.
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I Sherwin Harris, Resource Project Manager Public Utilities Department City of Riverside 3900 Main Street Riverside, California 92522 R. W. Krieger, Vice President Southern California Edison Company San Onofre Nuclear Generating Station
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P.O. Box 128
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l San Clemente, California 92674-0128 Dr. Harvey Collins, Chief
Division of Drinking Water and Environmental Management California Department of Health Services P.O. Box 942732 l
Sacramento, California 94234-7320 ll i
Terry Winter, Manager Power Operations San Diego Gas & Electric Company P.O. Box 1831 San Diego, California 92112 Mr. Steve Hsu l
Radiological Health Branch l
State Department of Health Services l
P.O. Box 942732
Sacramento, California 94234 l
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Mayor City of San Clemente 100 Avenida Presidio San Clemente, California 92672 Mr. Truman Burns \\Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Rm. 4102 San Francisco, California 94102 i
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SOUTHERN CAuf 0RN14 EDISON S*E";""
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ha EDISON INTLRkarl0NAL Company June 20,1997
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U. S. Nuclear Regulatory Commission Document Control Desk Washington, D.C, 20555 Subject:
Docket Nos. 50-361 and 50-362 Reply to a Notice of Violation San Onofre Nuclear Generating Station, Units 2 and 3 Reference:
Letter, Mr. A. T. Howell lli (USNRC) to Mr. Harold B. RAY (Edison),
dated May 23,1997
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The referenced letter transmitted the results of NRC Inspection Report No. 60-361/9748;and
- 50-362/97-08, conducted April 21-25,1997, at the San Onofre Nuclear Generating Station, Units 2 and 3. The enclosure to the referenced letter contained a Notice of Violation (9708-01), involving the failure to monitor in-process welding parameters. The enclosure tb
- this letter provides Edison's reply to the Notice of Violation.
As noted in the reference, the welding procedure specification requirement to adhere to heat input limits was not implemented by appropriate guidance (i.e., measuring, monitoring, or training). Work organizations believed that if they followed their normal welding practices,
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they would have been below the heat input limit. Edison has implemented interim heat input monitoring, and will evaluate further weld program enhancements.
If you have any further questions, please contact me.
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Sincerely,
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l Enclosure: Attached cc:
E. W. Merschoff, Regional Administrator, NRC Region IV A. T. Howell, Director, Division of Reactor Safety, NRC Region IV K. E. Perkins, Director, Walnut Creek Field Office, NRC Region IV l
J. A. Sloan, NRC Senior Resident Inspector, San Onofre Units 2 and 3 M. B. Fields, NRC Project Manager, San Onofre Units 2 and 3 i
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ENCLOSURE e
The enclosure to Mr. A. T. Howell's letter dated May 23 1997 st t a es, in part:
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'.. the most influential process variables are travel s
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ng heat input, states, in part,
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Voltage, for the purpose of heat input determination with this proca less
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joules perinch. Only amperage /travelspeed combin is 60,000 The following measures shall be taken to minimize welding []ind s mit... shall be used.
r strictly to the specified limits in this WPS for interpass and heat input
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uced sensitization: Adhere
" Contrary to the above, on April 23,1997, the inspectors observed d
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welding performed on two Unit 3 safety-related replacement pressure uring gas tungsten arc for reactor coolant piping that measures for minimizing weldi implemented. Specifically, the welding procedure specificati surement nozzles ng-induced sensitization were not variables had not been measured or monitored.
on specified limits for heat input
"This is a Severity Level IV violation (Supplement 1) (50 362/9708
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-01)."
REPLY TO THE VIOLATION 1.
Reason for the Violation inadequate because it required specific heat input lim
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son's welding program was to ensure the requirement was being met (i.e., measuring mo itered to witho a
been below the 60,000 joules per inch heat input limitorgani
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ces, they would have Please note the referenced inspection report calculated for the heat input of approximately 61,200 joules perinch However the d t iweld
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(10 volts x 102 amps x 60 seconds / minute divided by the dista
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a a n the inspection report inspection report uses a travel speed of 1 inch per minu
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er calculated in the inches per minute, based on the welder placing a half circ
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e actual travel speed is 1.18 build up with a diameter of approximately 0.75 inches in apumference weld b
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proximately 1 minute.
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Corrective Actions Taken and the Results Achieved
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On April 28,1997, Nuclear Oversight established interim monito i Standards,"was changed to include interim guidance
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eneral Welding parameters by welding engineers, and Nuclear Oversight Edison hasn oring follow-up surveillances on heat input monitoring (using tong t
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performed a number of to be in the range of 32,000 to 45,000 joules perinch
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esters), and found the heat input
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2-Corrective Actions That Will Be Taken 3.
riate changes An Edison welding team will evaluate this issue and implement any approp i i / measuring). This effort necessary for final issue resolution (training and/or per b S ptember 30,1997.
Date When Full Compliance Will be Achieved 4.
t blished an Full compliance was achieved on April 28,1997, when Nuclear Oversigh b
interim monitoring program to address in-process welding.
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