ML20079H464
| ML20079H464 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 01/12/1984 |
| From: | Koester G KANSAS GAS & ELECTRIC CO. |
| To: | Gagliardo J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| KMLNRC-84-005, KMLNRC-84-5, NUDOCS 8401230447 | |
| Download: ML20079H464 (2) | |
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KANSAS GAS AND ELECTRIC COMPANY THE ELECTmc COMPANY cLENN L MOECTER rats **ssereof sevcLean January 12, 1984 Mr. J.E. Gagliardo, Acting Chief i_$; ' y(ej, i Reactor Projects Branch U.S. Nuclear Regulatory Commission Region IV "k
i 611 Ryan Plaza Drive, Suite 1000 ll y j p 1938 Arlington, Texas 76011 KMLNRC 84-005
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Docket No. STN 50-482 Subj: Potential 10CFR50.55(e) Interim Report -
Heat Numbera With More Than One Pipe Schedule
Dear Mr. Gagliardo:
This letter provides an interim report on a potential 10CFR50.55(e) concerning heat numbers with more than one pipe schedule identified at Wolf Creek Generating Station. This matter was initially reported by Mr. Otto Maynard of Kansas Gas and Electric Company (KG&E) to Mr. Johns Jaudon of the Nuclear Regulatory Commission (Region IV) on December 13, 1983.
During an ultrasonic examination to verify wall thickness, a case was identified in which a schedule 80 piping spool piece had been installed where a. schedule 160 piece had been specified. This spool piece (SP503),
which is 3/4 inch in diameter and approximately nine inches long, was located in the Component Cooling Water (ET System. Subsequent investigation identified an additional case in the EG System in which a schedule 80 piping spool piece (SP555) was installed where a schedule 160 piece had been specified. Thin spool piece was 3/4 inch in diameter and approximately four inches long. Both spool pieces were of the same heat number (JC164C). Further research revealed that this heat number consisted of both schedule 80 and schedule 160 piping. This resulted in piping of the correct heat number and line size, but incorrect schedule having been installed.
There are a total of eight heat numbers that have two or more schedules of piping with the same line size. Therefore, the potential exists that in-correct schedule piping could have been installed when these heat numbers were used.
A Fonconformance Report (NCR) has been issued to document and correct the two instances described above. In addition, a Corrective Action Report (CAR l-P0032) has been initiated to determine if any other cases of schedule
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o JEGagliardo KMLNRC 84-005 January 12, 1984 substitution exist in the field and to prevent future misapplications of pipe with identical heat numbers and more than one schedule. In order to verify that the proper schedule of pipe was installed, ultrasonic testing is being performed on installed pipes of the heats in position.
At this time approximately one hundred ultrasonic examinations involving four of the eight heat numbers have been completed. No additional discrepancies have been identified.
The status of the potential 10CFR50.55(e) will be carried on the monthly status update as File 53564-Kll6. The final report or any significant new information will be submitted by separate correspondence.
In the interim, please direct any questions concerr ing the subject to me or to Mr. Otto Maynard of my staff.
Yours very truly, l
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f Glenn L. Koester Vice Prasident - Nuclear GLK bb f
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