ML19320D425
| ML19320D425 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 05/28/1980 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 8007210351 | |
| Download: ML19320D425 (1) | |
Text
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PDR UNITED STATES LPDR
/ Sa afog#'o NUCLEAR REGULATORY COMMISSION TIC /
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' ','n REGloN IV NSIC 7 I o-611 RYAN PLAZA DRIVE, SulTE 1000
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-j ARLINGTON, TEXAS 76012 CENTRAL FILES l
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May 28, 1980 In Reply Refer To:
RIV Docket Nos.
50-445/IE Circular No. 80-13 50-446/IE Circular No. 80-13 Texas Utilities Generating Company ATTN:
Mr. R. J. Gary, Executive Vice President and General Manager 2001 Bryan Tower Dallas, Texas 75201 Gentlemen:
The enclosed IE Circular No. 80-13, is forwarded to you for information.
If there are any questions related to your understanding of the suggested actions, please contact this office.
Sincerely,
,/ 0nt4l)~
v Karl V. Seyfrit,'
Director
Enclosures:
1.
IE Circular No. 80-13 2.
List of Recently Issued IE Circulars i
80072103S(
i,.
l SSINS No.: 6830
/.ccessions No.:
UNITED STATES 7910250495 NUCLEAR REGULATORY COMMISSION OFFICE OF INS.DECTION AND ENFORCEMENT WASHINbTON, D.C. 20555 IE Circular No. 80-13 Date: May 28, 1980 Page 1 of 2 GRID STRAP DAMAGE IN WESTINGHOUSE FUEL ASSEMBLIES Description of Circumstances:
During the refueling operation at Salem Unit 1, it was noted by the licensee that some of the assemblies that were removed had suffered grid strap mechanical damage. This was reported to the NRC in LER 79-44.
Subsequent to this discovery all fuel assemblies were removed from the core for examination.
The degree of the damage to the grid straps was classified in three cate-gories: small pieces missing (15 assemblies), grid material ripped and laid over (5 assemblies), larger sections missing and fuel pins exposed (11 assemb-lies). No damage to the fuel pins was observed. A total of 31 assemblies suffered some grid damage.
The damage appe: red to be the result of corner to corner interaction of the grid straps of diagonally adjacent fuel assemblies during the vertical loading and unloading movements. No correlation of the damage to core location, grid strap elevation, or manufacturing and shipping batches has been identified.
The licensee and the fuel manufacturer established the following guidelines for reloading damaged assemblies: (1) those assemblies with full width pieces missing will not be reloaded for cycle 2, (2) those assemblies with deformed edges and those with small piecec missing will be reloaded with special pro-cedures to prevent further damage.
Salem Unit 1 is fueled with 17X17 Westinghouse assemblies.
Similar grid problems have occurred at other facilities fueled with.14X14 and 15X15 Westinghouse assemblies; however, fewer assemblies were damaged in those instances.
Recommended Acticas:
All licensees using 14X14,15X15, or 175AFJ--*laalvmea-.assamhlir n nre advised jf Of?9tF yWL to:
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(1) Visually inspect grid straps of
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DUPLICATE DOCUMENT discharged from the core as well the spent fuel pool Ior control Entire document previously returned to the cree.
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