IR 05000010/1975018
| ML19340A581 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 11/26/1975 |
| From: | Key W, Ledoux J, Lee E K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML19340A578 | List: |
| References | |
| 50-010-75-18, 50-10-75-18, NUDOCS 8008280638 | |
| Download: ML19340A581 (6) | |
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UNITED STATES NUCLEAR RECULATORY COMMISSION OFFICE OF INSPECTION AND ENORCEMENT REGION 'III
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Report of Construction Inspection IE Inspection Report No. 050-010/75-18 Licensee:
Commonwealth Edison Company P. O. Box 767 Chicago, Illinois 60690
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Dresden Nuclear Power Station License No. DPR-2 Unit 1.
Category:
C Morris, Illinois Type of Licensee:
BWR (GE) 200 MWe Type of Inspection:
Special Unannounced Dates of Inspection:
. November 5 and 13,1975
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Principal Inspector:
E. W. K. Lee '
J (Date)
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Accompanying Inspector:
W.
Key
/' f 3 (November 5, 1975 only)
'(Date)
Other Accompanying Personnel:
None
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Reviewed By:
J. C. LeDoux
///A'//l Section Leader (Date')
Engineering Support Section Reactor Construction and Engineering Support Branch
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SUMMARY OF FINDINGS
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Inspection Summary Inspection on November 5 and 13, (75-18): Review ISI NDE records and six-inch cleanup demineralizer and unloading heat exchanger return line NDE records.
Enforcement Items None identified.
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Licensee Action on Previousiv Identified Enforcement Items None.
I Other Significant Items l
A.
Systems and Components 1.
Replacement of portion of the six-inch cleanup deminer-alizer and unloading heat exchanger return line of Loop A
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was completed, however, longitudinal cracks in the thermal
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sleeve were identified by radiographic examination. The licensee plans to replace the thermal sleeve. Various thermal sl.ceve designs are being studied by the licensee.
Ultrasonic examination was performed on the thermal sleeve on Loop B and no indication was found.
i 2.
Flaw indication on the safety valve nozzle to steam drum weld is being evaluated by the licensee. The licensee is performing ultrasonic examination on the other nine (9) safety valve nozzle to steam drum welds.
(Report Details, Paragraph 1)
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Facility Items None.
C.
Managerial Items None.
D.
Noncompliance Identified and Corrected by Licensee None.
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E.
Deviations
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(5 None.
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F.
Status of Previously Reported Unresolved Items 1.
Tapes Used on Stainless Steel Surfaces (IE Inspection Report No. 050-010/75-15)
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During the previous inspection, it was determined that documentary evidence to show that tapes used on sur-faces of stainless steel have been evaluated and found acceptable was unavailable at the site.
I During this inspection, the inspector was informed that the tape had been removed from the six-inch stainless steel elbow and the elbow was cleaned with penetrant l
cleaner. The licensee also stated that QC procedure was revised to include the proper instructions and is now in printing. The inspector stated that this matter remains unresolved, pending review of QC procedure during a subsequent inspection.
2.
Discrepancy Between 1971 Edition of the ASME Boiler and Pressure Vessel Code,Section XI and Technical S ecifica-
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tion (IE Inspection Report No. 050-010/75-15)
This unresolved matter was not reviewed and the status remains unchanged.
Management Interview d
i A.
The following Commonwealth Edison Company (CE) personnel attended the management interview at the end of the inspectioa.
J. S. Abel, Administrative Assistant G. J. Harrison, Lead Engineer (Unit 1)
l R. C. Herbert, Engineer R. C. Lemke, Engineer R. J. Meadows, QC Engineer B.
Matters discussed and comments, on the part of the management personnel were as follows:
1.
Plans to resolve the flaw indication on the safety valve nozzle to steam drum weld was discussed.
(Report Details Paragraph 1)
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t 2.
The inspector reviewed the status of previously reported
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unresolved matters described in the Summary of Findings section of this report.
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REPORT DETAILS
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Persons Contacted The following individuals, in addition to those lirted under the
Management Interview section of this report, were contacted during the inspection.
Commonwealth Edison Company (CE)
D. C. Maxwell, Quality Control Engineer Lumbermens Mutual Casualty Company
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J. W. Gibson, Authorized Inspector
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Phillips-Getschow Company (PG)
T. L. Gugluizza, Quality Control Engineer J. T. Taylor, Jr., Welding Inspector Hartford Insurance Company (Hartford)
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A. Jimenez, Authorized Inspector
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Results of Inspection 1.
The licensee stated that the flaw indication on the safety valve nozzle to steam drum weld is being evaluated using the 1974 edition of the ASME Boiler and Pressure Vessel (B&PV)
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Code Section XI.
The UT mapping used in this evaluation is based on the 1971 edition of the ASME B&PV Code Section XI.
In order to be consistent with the 1974 code, the licensee is obtaining a new UT test block and plans to map the flaw indication in accordance to the 1974 code. Final evaluation will then be performed based on the new mapping and the 1974 ASME B&PV Code Section XI criteria.
In addition to the code requirement, the licensee plans to perform a finite element analysis. The licensee also stated that, if the flow indic-ation is determined to be unacceptable the repairs will be performed in accordance with welding Procedure No. 3 or No. 4, of the 1974 ASME B&PV Code Section XI, with the exception that if Procedure No. 3 is used. heat treatment required by the 1974 code may not be fully met.
The inspector stated that NRC plans to review the evaluation in depth. The inspector also stated that even if the flaw indication-5-
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is determined to be acceptable, this matter still has the possibility of beir g treated as an unreviewed safety -
matter as defined in 10 CFR Part 50, Paragraph 50.59.
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2.
The inspector reviewed the following NDE records and deter-mined them to 'ae acceptable:
Radiograph films of final welds associated with the a.
repair of the six-inch cicanup demineralizer and unloading heat exchanger return line, b.
ISI ultrasonic examination reports of following piping welds:
1.
Feedwater system piping welds No. 32, No. 33,
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No. 34 and No. 41.
2.
Poison feed syscem piping welds No. 31855 and No. 1775.
3.
Six-inch recirculating bypass piping welds No. I through No. 8.
4.
Eighteen-inch main steam piping welds No. 16S, No. 17S, No. 17N and No. 18N.'
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3.
The inspector reviewed welding rod material certification with heats No. 13200, No. 402188, and No. 336153 and determined them to be acceptable.
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