ML20151M536
| ML20151M536 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 07/25/1988 |
| From: | Trevors G NEBRASKA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| RTR-NUREG-0619, RTR-NUREG-619 CNSS887363, NUDOCS 8808050213 | |
| Download: ML20151M536 (2) | |
Text
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COOPER NUCLEAR STATION e
Nebraska Public Power District 7A"E?s"J't@h"a^ii
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CNSS887363 July 25, 1988 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555
Subject:
Report of Cooper Nuclear Station Feedwater Nozzle Examinations per NUREG 0619.
Gentlemen:
In accordance with Section 4.4.3.1(2) of NUREG 0619, "BWR Feedwater Nozzle and Control Rod Drive Return Line Nozzle Cracking", the following report of visual examinations of the feedwater spargers at Cooper Nuclear Station, conducted during the Spring 1988 Refueling Outage, is presented.
(a) There have been six startup/ shutdown cycles at Cooper Nuclear Station since the latest visual examinations of the feedwater spargers in 1986.
There have been 118 startup/ shutdown cycles at Cooper Nuclear Station since the initial startup of the plant in 1974.
(b)
In 1980, Cooper Nuclear Station removed the feedwater nozzle cladding and installed double-piston-ring, triple-thermal-sleeve spargers.
Subsequent to this, baseline ultrasonic and liquid penetrant examinations were performed per Cooper Nuclear Station and General Electric procedures.
No cracks or recordable indications were identified during these examinations.
In 1982, the feedwater nozzles and spargers were examined by ultrasonic and visual methods, respectively, per Cooper Nuclear Station and General Electric procedures.
No cracks or recordable indications were identified during these examinations.
In 1983 and 1984, the feedwater spargers were visually examined per Cooper Nuclear Station and General Electric procedures.
No cracks or recordable indications were identified during these examinations.
In 1986, the feedwater nozzles and spargers were examined by ultrasonic and visual methods, respectively, per Cooper Nuclear Station and General Electric procedures.
No cracks or recordable indications were identified during these examinations.
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- <,e U.S. Nuclear Regulatory Commicsion July 25, 1988 Page 2 (c) There have been no changes to procedures or systems that would affect the feedwater temperature or flow.
(d) There were no recordable indications identified from visual examination of the feedwater spargers in the 1988 examination.
(e) Cooper Nuclear Station does not utilize a leakage monitoring device.
(f) No ultrasonic examinations of the feedwater nozzles were performed in 1988.
Please contact E. M. Mace, Engineering Manager at Cooper Nuclear Station, if you should require additional information regardi.ng this matter.
Sincerely.
071
'. A'. Trevors Division Manager of Nuclear Support GAT:SSF:ss cc: NRC Regional Office Region IV NRC Resident Inspector Cooper Nuclear Station