IR 05000289/1979015
| ML19260C203 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/06/1979 |
| From: | Jernigan E, Lester Tripp, Walton G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML19260C195 | List: |
| References | |
| 50-289-79-15, NUDOCS 7912260056 | |
| Download: ML19260C203 (4) | |
Text
.
U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT Region I Report No. 50-289/79-15 Docket No. 50-289 License No. DPR-50 Priority
--
Category C
Licensee:
Metropolitan Edison Company 260 Cherry Hill Road Parsippany, New Jersey 07054 Facility Name:
Three Mile Island Unit No. 1 Inspection at:
Middletown, Pennsylvania Inspection conducted: July 30-31; August 14-15, 1979 Inspectors:
= fe A~
b h! w 3/ 474 E. P. Jernigan, Reactor Inspector date signed
$Ldu
"
she
~6. A. Waltdn, Reactor Inspector
' 'date signed date signed Approved by:
/.h.
4/
//[6[79 L. E. Tripp, Chief Engineering Support date signed Section No. 1, RC&ES Branch Inspection Summary:
Inspection on July 30-31; August 14-15,1979 (Report No. 50-289/79-15)
Area Inspected:
Special announced inspection by regional based inspectors of the licensee examination program of stagnant piping systems.
This inspection involved 29 inspector-hours on site by two NRC regional based inspector.
Resul ts :
No items of noncompliance or deviations with regulatory requirements were identified.
1616 024
.
Region I Form 12 (Rev. April 77)
7912200
.
.
DETAILS 1.
Persons Contacted Metropolitan Edison Company (Met Ed)
W. Potts, Superintendent, Technical Support T. Mackey, Manager, Site Quality Control J. Potter, Quality Control Engineer Meeting Attendees Het Ed T. Mackey W. Potts J. Potter F. Giacobbe NRC J. Collins E. Jernigan R. Herman A. Taboada NRC Consultants J. Weeks J. Smith J. Gleski 2.
Stagnant Borated Water Systems-Examination Program a.
i.icensee Event No. PN-NRC:I-69 On June 21, 1979, the licensee reported to the NRC, that during routine inspection, an incipient crack was observed in the spent fuel cooling system piping.
Based on these inspection results, the licensce developed an inspection program to volumetrically examine welds in stagnant portions of several systems.
Specifi-cally, stainless steel piping welds in stagnant protions of the following systems were included; spent fuel cooling, decay heat removal, reactor building spray and makeup and purification 1616 025
.
.
water.
The program involved volumetric examination of 1902 welds in the above identified systems.
--
Licensee /NRC Meeting Sqmmary A meeting of representatives of Metropolitan Edison Company, NRC and their respective consultants was held at the plant site, to assess the scope and technical adequacy of the examination program and the implementing procedure.
Alsc, the licensee's plans to evaluate / disposition were discussed.
The licensee has not finalized these plans at this time.
b.
Implementing Ultrasonic Test (UT) Procedure The inspector reviewed the examination contractors' implementing procedure UTL-UT-SP-10.
This. procedure was developed for the examination of austenitic material between 1/8" to 2-inches in thickness.
Further, it is intended to examine the weld heat-affected-zone (HAZ) for intergraaular stress corrosion cracking (IGSCC).
This procedure had been reveiwed and approved by authorized licensee personnel.
The inspectors' review included the below listed considerations:
The type of apparatus including frequency range is necified.
--
--
The extent of coverage, beam angle (s), nominal frequer y and transducer size are specified.
Recording, evaluation and/or acceptance criteria for flaw
--
indications are specified.
No items with regulatory requirements were identified.
However, the inspector noted that the procedure did not address equipment linearity.
c.
Personnel Qualification Records The inspector audited qualification records of personnel performing the examinations.
The records identified the method and level to which the individual had been trained and certified.
Physical examination records showed whether or not visual aids were required while performing examinations.
These records were consistent with procedural requirements.
No items of noncompliance were ident1. fed.
F 1616 026
.
..
.
d.
Technique Demonstration The inspector witnessed a demonstration of the examination technique using the implementing procedure.
This demonstration was performed on sections of pipe, containing defects, which had been removed from the system.
These pipe sections were then sectioned longi-tudinally through the defective area.
The specimen edges were polished for defect enhancement and to provide for depth measure-ment.
The defect (s) were located in the weld HAZ and ranged from
.006-inches in depth to through wall.
The demonstration was performed in the area adjacent to the edge of the specimen with the sound beam directed perpendicular to the longitudinal axis of the weld.
The technique employed was sufficiently sensitive to disclose the.006-inch deep crack.
Based on the inspectors observations and discussions with licensee and contractor examination, the examination technique was deemed to be adequate for the det tion of IGSCC.
The inspector had no further questions regarding this item at this time.
3.
Exit Interview At the conclusion of the inspection, the inspector discussed the important aspects regarding the examination program.
I616 027