IR 05000272/1992010
| ML18096A847 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 07/16/1992 |
| From: | Harris R, Mcbrearty R, Peterson P NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML18096A846 | List: |
| References | |
| 50-272-92-10, 50-311-92-10, NUDOCS 9207280105 | |
| Download: ML18096A847 (4) | |
Text
-U.S-. NUCLEAR REGULATORY COMMISSION REGION 1 DOCKET NO REPORT NO. LICENSE NO LICENSEE:
FACILITY NAME:
INSPECTION AT:
50:272 50-311
' 50:272/92-10 50:311192-10-DPR-70 DPR-75 Public Service Electric & Gas 80 Park Place Newark. New Jersey 07101 *
. Salem Nuclear Plant Units 1 & 2 Hanci>cks Bridge. New Jersey * *
INSPECTIO~ DATES:
June 23. 1992 to June 25. 1992 INSPECTORS: 11.,.,, ~{i. kt-~
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R. Harris, Techriician,
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P. M. Peterson, Techni~~
APPROVED BY:
R. McBrearty, Reactor Engineer, 0 I k h.,, ;JJC;l!J M. C. Modes, Chief, Mobile NDE *
Laboratory, Engineering Branch, DRS
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Inspection Summazy and Conclusions: An announced inspection was conducted of activities associated with the implementation of th~ licensee's erosion/corrosiOn program to.ascertain that those activities were accomplished in compliance with regulatory requirements and
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licensee commitments and procedures. Included in this inspection was a review of licen-see records related to thickness measurements, independent verification by regional NRC Mobile NDE Laboratory personnel of licensee thickness measurements and observations of thickness
- measurements in progres eo105 920120 - NF PDR APOCK 0:5000272
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The inspection concluded that wall thickness measurements by the licensee's contractor personnel were performed in compliance with applicable procedural requiiements. The NRC*
verification measurements showed good oorrespondence with the associated licensee result __.-,
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ULTRASONIC THICKNESS MEASUREMENTS Three components at Salem Unit l,J4X16 Expander (1S-SGF48ARP-El), 14X16 Expander (12SGE1) and lS-SFG-16-Ll, were selected for independent ultrasonic thickness measurements to determine the accuracy of those measurements taken. by the licensee or its contractor-.
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Random thickness readings were taken on the existing grids by the NRC, and were directly c0mpared with the readings taken by the licensee. The readings obtained by "the NRC were*
withiii + _.005" of that taken by the license As a result of this examination, several areas were found to be below. the minimum allowable wall thickness as specified by the licensee's thickness measurements report. The examinations, performed by the subcontractor, were accurate, conservative, and _detfillecL Careful consideration was reflected in the reports by the number of notes and comments referring to additional evaluations undertaken to determine conclusively the results of an examination~ *
- OBSERVATIONS OF INSPECTIONS IN PROGRESS During* the refueling outages at each Salem unit, Southwest Research Institute (SWRI).
nondestructive examination personnel performed ultrasonic thickness measurements of piping included in the licensee's erosion/corrosion (E/C) program. Based on the results of those inspections and discussions with the NRG, the licensee expanded the original inspection sample to include additional components. Ultrasonic thickness measurefl!ents taken by Magnaflux Quality Services (MQS) nondestructive examination personnel were observed on the following Salem Unit 2 components: 2S-HD-470..Ll, 6 11 diameter heater drain system elbow and 2-SGF-117-Ll, 20" diameter feedwater system elbow. These two components are not included in the current E/C program for Salem Unit 2, but they were inspected beeause a
. geometrically similar area ~as found to exhibit wall thinning in Salem Unit The insi}ection of the 20" diameter f~water system elbow was performed to bound two thin areas previously detected. A 1" grid pattern~ which was placed over the original 4" grid pattern, was used for the. second inspection. The 6" diameter heater drain system elbow was inspected entirely using a 1" grid pattern.*
Qualification and certifications records of MQS NDE personnel, who were performing the *
ultrasonic thickness measurements at Salem, were reviewed. These reeords confirmed that the personnel are qualified to perform their assigned dutie The data was collected using an ultrasonic thickness instrument and data logger*. which was calibrated using a known* thickness and material which bounded* the expected thickness range..
of the production item. When.the data acquisition process is completed, the licensee's
- inservice inspection (ISI) engineer. downloads the data logger into a personnel computer.
. 'program which then prints a hard copy report for review.. All measurements equal to or less
- than the specifie4 minimum thickness are highlighted. **The highlighted data is immediately submitted to the licensee's engineering group for evaluation and disposition. All of the data*
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is eventually submitted to the engineering group for evaluation, but if there isn't a problem
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highlighted, the data may not be evaluated until after the plant has gorie back into operation:
- In the case of the._SWRI inspections, the. ultrasonic thickness measurement information is.
included in.the final ISI report, which is not reviewed by the licensee until the plant is back. *
in operation. * CONCLUSIONS The licensee inspections were performed l;>y competent, qualified examiners who follow the*
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- applicable portions of the licensee's E/C program regarding equipment calibration, grid size, recording data and providing the data to the licensee. The preiiminary data evaluation by the ISI engineer was perforrp.ed promptly upon receiving the data from the inspection pers~nnel and, when deemed appropriate, the information was promptly submitted to the engineering group. A potential problem exists regarding the data which does not highlight wall thinning and data which is not evaluated until the plant is placed back in servic.0 MANAGEMENT MEETINGS Licensee management was informed of the scope and purpose of the* inspection at the entrance interview on June 23, 1992. The findings of the inspection were discussed with the licensee representatives during the course of the inspectio.0 PERSONS CONTACTED Public Service Electric and Gas Company W. Schultz B. Edmonds C. Conner L. Lake M. Gross T. Cellmer
- M. Swedlock B. Preston Manager, Station Site. Services ISI Site Services Station RP Manager Maintenance Manager
. Manager Salem Projects
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