ML17319B681
| ML17319B681 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 11/29/1982 |
| From: | Hunter R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17319B682 | List: |
| References | |
| AEP:NRC:0746A, AEP:NRC:746A, NUDOCS 8212030125 | |
| Download: ML17319B681 (10) | |
Text
SUBJECT; Fol 1 ows up 821014 1 tr r e emer gency r equest for rel ief f r om Tech Spec 3,5,'2 on safety, injection'ump operability requirements,Repairs to <<south safety injection pump completed 8
pump.returned to operable status on 821016
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NO DOCKET FACIL:50 315 Donald C ~
Cook Nuclear Power Plant~ Unit 1~ Indiana 8
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I'ndiana 8 Michigan Electric Co, RECIPqNAME RECIPIENT AFFILIATION DENTONgH,R<
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INDIANA L MICHIGAN ELECTRIC COMPANY P. O.
BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. 10004 November 29, 1982 AEP:NRC:0746A Donald C.
Cook Nuclear Plant Unit No.
1 Docket No. 50-315 License No. DPR-58 REQUEST FOR RELIEF FROM TECHNICAL SPECIFICATION 3.5 '
FEE Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555
Reference:
Letter No. AEP:NRC:0746, dated October 14, 1982
Dear Mr. Denton:
This letter is a follow-up letter to the above referenced letter regarding the emergency relief request from Technical Specification No. 3.5.2 of Unit 1 of the Donald C. Cook Nuclear Plant.
Please be advised that repairs and adjustments to the South Safety Injection Pump of Unit 1 were completed and the pump was returned to the operable status on October 16, 1982 following a satisfactory pump test.
A copy of the above referenced letter is attached for your information.
Copies of the summary of repairs performed for both the North and South Safety Injection Pumps of Unit No.
1 are also attached as requested by your staff.
In accordance with 10 CFR 170.22, this request for Technical Specification relief is considered to constitute a Class III Amendment.
A check in the amount of $4,000.00 accompanies this submittal.
We thank you for your expeditious attention to our request.
8212030125 82ii29
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Mr. Harold R.
ton AEP:NRC:0746A This document has been prepared following Corporate Procedures which incorporate a reasonable set of controls to ensure its accuracy and completeness prior to signature by the undersigned.
Very truly yours,
/os R.
S. Hunter Vice President cc:
John E. Dolan - Columbus M. P. Alexich R.
W. Jurgensen W. G. Smith, Jr. - Bridgman R. C. Callen G. Charnoff Joe Williams, Jr.
NRC Resident Inspector at Cook Plant
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ook Nuclear Plant-Unit 1
ATTACHMENT TO AEP:NRC:0746A UNIT 1 NORTH SAFETY INJECTION PUMP REPAIRS On August 15, 1982 the Unit 1 North Safety Injection,. Pump (Pacific Pump, Type ACTH) was started for a blackout test.
The pump was shut down due to overheating and it was discovered that the shaft had broken between the 5th and 10th stages.
The cause has been attributed to a failed closed check valve (SI-104N) on the recirc. line.
Disassembly of the pump was initiated and subsequent casing measurements revealed that the casing had been warped due to overheating.
Pacific Pump recommended a vendor to perform +he in-place machining.
It became apparent that the recommended vendor could not perform the required machining so the plant contracted, a
new vendor.
The new vendor machined the casing to within specification within a 2 week period.
During the interim, a new shaft was procurred, a new check valve was installed in the recirc lire, all impellers were balanced, new 0-rings were installed on the intermediate
- covers, and the rotating assembly was reassembled.
The pump was reassembled and a test run was made September 23, 1982.
This test revealed low discharge pressure and high vibration at the bearings.
Disassembly of the pump was initiated the same day.
The pump rotating element was found to be out of its hydraulic center.
The element was centered and the pump was reassembled.
On September 24, 1982, another test was run.
The discharge pressure was acceptable but the hioh vibration was still present.
Disassemb'.y of the pump was initiated the same day.
Following disassembly, all clearances were micrometer checked.
This check revealed that five impellers had exc ssive clearances at the impeller -.o-shaft bore.
New impellers were procured ard balanced.
shaft was found to be bowed and was subsequently straightened.
The The rotating assembly was checked for runout and runout was found to be excessive.
A series of lapping processes on the impeller spacer
- sleeves, shaft locknuts, and impeller hub faces were performed.
This lapping process brought the runout readings to within specifications.
The pump was reassembled and mo.or alignment complete by 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> on
.September 29, 1982.
Subsequent testing revealed acceptable suction and discharge pressure, fluid tempera+ures, and vibration readings.
The pump was declared operable at 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br /> on September 29, 1982.
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AD.
ook Nuclear Plant-Unit 1
ATTACHMENT TO AEP:NRC:0746A UNIT 1 SOUTH SAFETY INJECTION PUMP REPAIRS On October 12, 1982 the Unit 1 South Safety Injection Pump was run for surveillance testing.
Discharge pressure and fluid flow were normal,,
but vibration was found to be excessive.
The pump was declared inoperable at 1704 hours0.0197 days <br />0.473 hours <br />0.00282 weeks <br />6.48372e-4 months <br /> the same day.
Following disassembly, micrometer readings were taken on all parts.
All parts were found to be within specifications.
The shaft was bowed and was subsequently straightened.
All impellers were individually balanced.
A runout check revealed excessive runout on the rotating element.
A series of lapping processes on the shaft locknuts, impeller spacer
- sleeves, and impeller hub aces were per ormed.
The runout on the rotating assembly was brought into specifications by this process.
New O-rings, horizontal casing joint gasket, and bearing gaskets were installed.
The rotating element was centered and the motor aligned.
The pump was test run at 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br /> on October 16, 1982.
All pressures,'lows, temperatures, and vibrations w re found to be accep able and the pump was declared operable.