IR 05000309/1980003
| ML19309E180 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 02/21/1980 |
| From: | Sanders W, Lester Tripp NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML19309E178 | List: |
| References | |
| 50-309-80-03, 50-309-80-3, NUDOCS 8004180512 | |
| Download: ML19309E180 (5) | |
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U. S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT
REGION I
O Report No.
50-309/80-03 Docket No.
50-309 License No.
DPR-36 Priority Category C
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Licensee:
Maine Yankee Atomic Power Company 20 Turnpike Road Westborough, Massachusetts 01581 Facility lume:
Maine Yankee Atomic Power Station Inspection At:
Wiscasset, Maine Inspection Conducted:
January 22-25, 1980 Inspectors:
@/, f mum 9h g #po W. F. Sanders, Reactor Inspector dat6 date'
date Approved by:
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A4dC OC)
E. E. Tripp(/ Chief, Engineering Support
' date Section No. 1, RC&ES Branch Inspection Summary:
Inspection on January 22-25, 1980 (IE Report No. 50-309/80-03)
Areas Inspected:
Routine, unannounced inspection of the licensee inspection pro-gram and the implementation of the examination and testing requirements imposed by ASME Section XI.
The inspection consists of program review, personnel qualifi-cation, observation of N.D.E. performed and review of test data.
The inspection involved 26 inspection hours on site by one NRC regional based inspector.
Results: No items of noncompliance were identified.
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Region I Form 167 (August 1979)
004180 g.
DETAILS 1.
Persons Contacted
Maine Yankee Atomic Power Station Principal Licensee Employees
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Mr. E. C. Wood, Plant Superintendent
- Mr. C. D. Frizzle, Assistant Plant Superintendent
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- Mr. J. R. Hebert, PEQAG Supervisor
- Mr. L. J. Speed, Mechanical Engineer
- Mr. P. R. Willoughby, ISI Coordinator
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Yankee Atomic Electric Company
- Mr. S. Sadosky, QA Coordinator The Hartford Steam Boiler Inspection and Insurance Co.
R. L. Lane, Authorized Nuclear Inspector 2.
The plant was in a shut down mode for refueling, Inservice Inspection (ISI),
and plant maintenance.
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Scope
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This inspection was made to examine the quality related activities asso-ciated with the ISI program.
This was the last inspection required to complete the second 40 month period of the licensee inspection program.
This examination program is based on the technical specification require-
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ments and the 1974 Edition of ASME Boiler and Pressure Vessel Code, Sec-tion XI 1974 edition, summer 1976 addenda with appendix III.
A follow up inspection was also made to review the radiography results and evaluations required by IE Bulletin 79-13 for the examination of the feedwater lines.
Details in Paragraph 4 l
A.
N.D.E. ~ Examination of Feedwater' Welds
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The nondestructive testing and subsequent evaluations performed by the licensee in response to IE Bulletin 79-13, were examined during this inspec-tion.
The testing performed and the evaluation results were reported by the licensee by letter to the Director of IE:RI. previously The program i
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included 63 main feedwater pipe butt welds and 3 auxiliary feed to main feed branch connections and included all of the feedwater line welds from the containment penetration up to and including the pipe to nozzle and nozzle transition piece welds.
The testing revealed 5 welds with indica-tions which were evaluated as acceptable because the indications can be seen on the original construction radiographs which would conclude that they were not induced by operating service conditions on the lines.
In addition,' the welds were examined by ultrasonic techniques to the inseryice requirements of ASME Section XI Summer 76 Addenda 'and Appendix III for operating plants. The UT results show all of the indications to be within the acceptance limits with one indication at 60% nAC and the remaining indications below the recording level of 50" UAC.
The inspector examined the original radiographs taken during construction and compared the weld images with the recent radiographs.
The indications could be clearly compared and the characteristics of both welds correlated.
The inspections and evaluations performed by the licensee appear to ade-quately respond to the specified actions in Bulletin 79-13 and this item is considered resolved.
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5.
N.D.E. Program and Procedure Review
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The inspector reviewed the current program in effect and the working non-destructive test procedures for compliance with the requirements of ASME Section XI Code,1974 Edition summer 75 Addenda and Appendix III sumer 1976. Many of these procedures had been reviewed on previous inservice inspection at other plant sites, therefore, it was only necessary to review the listed procedures for changes or revisions and the applicability of the procedure to the specific component being tested.
There were no items of noncompliance identified regarding the technical content.
The proce-dures reviewed are listed:
Ultra Sonic YA-UT-1-1 - General Ultra Sonic YA-UT-4-1 - Nozzle to Shell Ultra Sonic YA-UT-7-1 - Closure Studs Ultra Sonic YA-PE-2-1 - Liquid Penetrant Ultra Sonic YA-VT-1 - Visual 6.
Personnel Qualifications The inspector audited the qualification records of selected personnel involved with the performance of the nondestructive examinations during the current outage. The records for five N.D.E. technicians were examined for compliance to the requirements of SNT TC-1A and ANSI N.45.2.6 for the disciplines in which the individual was trained and certified, resume of experience, level of certification including date certified.
The physical examination records were current and included visual acuity tests.
Quali-fication records were selected and examined for personnel as shown:
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Ultra Sonic Liquid Personnel Test Examination Penetrant Exam Particle Exam A
Level I B
II II C
II II D
II II II E
I No items of noncompliance were identified.
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Observations Observations were made of selected nondestructive examinations in progress on pressure components inside of the primary containment.
This inspection was made to observe compliance to the approved and applicable procedures in the areas of:
Application of qualified personnel to the specific tests according
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to their established certifications Calibrations of instrument and test system
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Use of proper calibration standards
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Establishment of Distance Amplitude Curve (DAC)
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Measurement of Beam Spread
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Recording of Calibration Data
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Preparation and Cleanliness of Test Specimens
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Extent of testing or scanning
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Recording of test data
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Evaluation of test results
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The above observations were made for the tests performed on the following components.
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Steam Generator No. 1 Primary outlet nozzle MK B3.2 to vessel weld shown on drawing E233-100,. volumetric examination to procedures M-UT-1 and YA-UT-4.
Pressurizer Safety valve nozzle safe ends shown on drawing E 233-983 MK No. 57 - Liquid Penetrant Examination (LPE) per procedure YA-PE-2
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MK No. 58 - Liquid Penetrant Examination (LPE)
MK No. 59 - Liquid Penetrant Examination (LPE) per procedure YA-PE-2 per procedure YA-PE-2
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i Relief Valve Nozzle Liquid Penetrant Examination (LPE) per procedures YA-PE-2 MK No. 56 Volumetric Examination per YA-UT-1 and YA-UT-4
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8.
Ground Cavities in Nozzle
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A visual examination of the safety valve nozzle safe ends performed by the I
licensee's representative revealed two ground areas in the bottom 0.D. sur-face of nozzle No. 58. ~These were ground cavities that appeared to be caused by a small grinding wheel. The maximum depth was 1/8" inch and the other 1/16" inch. These areas were measured, recorded, reported and evaluated by corporate engineering within the Quality Assurance System of YAEC.
The inspector was informed and assured that the preliminary engineering evaluation show the cavities as is to ae within the design parameters and no further action was planned. The cavity measurements and evaluation will l
be in the required submittal of the ISI report.
No items of noncompliance
were identified.
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Exit Interview At the conclusion of the inspection on January 25, 1980, a meeting was held at the Maine Yankee plant site with representatives of the licensee. Attend-ees at this meeting included personnel whose names are indicated by nota-tion (*) paragraph 1.
The inspector summarized the results of the inspec-i tion as described in this report.
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