ML20080D955
| ML20080D955 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 08/17/1983 |
| From: | Koester G KANSAS GAS & ELECTRIC CO. |
| To: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, KMLNRC-83-108, NUDOCS 8308300662 | |
| Download: ML20080D955 (4) | |
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a KANSAS GAS AND ELECTRIC COMPANY TH ELECtmC COMPANY GLENN L MOC$TER vscEpetssotsv.mucLEao August 17, 1983 Mr. W.C. Seidle, Chief k
Reactor Projects Branch 2 U.S. Nuclear Regulatory Commission
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Region IV f9fg 611 Ryan Plaza Dri're, Suite 1000 Lj j
Arlington, Texas 76011 KMLNRC 83-108 Re:
Docket No. STN 50-482 Subj: Final 10CFR50.55(e) Report - Auxiliary Feedwater iump Shaft
Dear Mr. Seidle:
Attached is the final 10CFR50.55(e) report on the bent shaft in an auxiliary feedwater pump at Wolf Creek Generating Station.
This item was initially reported by Mr. Otto Maynard of Kansas Gas and Electric Company to Mr. William Johnson of the Nuclear Regulatory Commission, Region IV, on July 18, 1983.
If you have any questions concerning this subject, please contact me or Mr. Otto Maynard of my staff.
Yours very truly, f,
y GLK:bb Attach cc: RCDeYoung, w/a HRoberds/WSchum, w/a 8308300662 830817 PDR ADOCK 05000482 g
._I E -3 7
///
201 N. Market - Wichita, Kansas - MaH Address: RO. Box 200 l W1chtta, Kansas 67201 - Telephone: Area Code (316) 261-6451
s Attachment to KMLNRC 83-108 Page 1 of 3 Final 10CFR50.55(e) Report On Auxiliary Feedwater Pump Shaft For
'dolf Creek Generating Station i
Kansas Gas and Electric Company August 17, 1983
Attachment to KMLMRC 83-108 Page 2 of 3 Introduction and Description of Deficiency During a recent attempt to disassemble and clean the rotating assembly of one of the Auxiliary Feedwater Pumps, difficulty was experienced when atte=pting to remove the #7 impeller which had galled to the shaft. The assembly was subsequently sent back to the manufacturer (Ingersoll-Rand) and the shaft had to be cut in order to complete the disassembly. The manufacturer then installed a new shaft in the rotating assembly and returned it to Wolf Creek. After the assembly was placed into the pump casing, required component testing was performed to determine the accept-ability of the unit. During the testing it was determined that the new shaft was bowed.003 inches out of allowable tolerance. An attempt was made to straighten the shaft in the field using an Ingersoll-Rand procedure, but the shaft was still bowed out of tolerance.
Safety Implications The Auxiliary feedwater Pumps are used to mitigate the consequences of certain postulated accidents and start whenever safety injection is initiated. If the shaft is bowed too much, the rotating assembly could seize and render the pump inoperable.
It should be noted that in addition to the two electric driten Auxiliary Feedwater Pumps there is a backup turbine driven pump. Therefore, the loss of one pump would not prevent the auxiliary feedwater system from performing its required function.
It should also be noted that the bowed shaft was discovered as part of the formal component testing activities designed to identify and resolve such concerns during the initial test program.
r i
Attachment to KMLNRC 8 3-108 Page 3 of 3 Corrective Actions The shaft in question is being replaced with a new shaft from Ingersoll-Rand. Upon receipt of the new shaft, required component testing to assure the component is ready to support initial component and system testing will be performed. These corrective actions will be completed prier to fuel load.