ML20039C489
| ML20039C489 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 12/08/1981 |
| From: | William Jones OMAHA PUBLIC POWER DISTRICT |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-SSINS-6820 IEB-81-01, IEB-81-1, NUDOCS 8112290401 | |
| Download: ML20039C489 (3) | |
Text
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Omaha Public Power District
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1623 HARNEY B
OMAHA. NEBRASMA 68102 e TELEPHONE S36 4000 ARE A CODE 402 December 8, 1981 1
Mr. J. T. Collins, Administrator x
U. S. Nuclear Reculatory Commission s8 g
Office of Inspection and Enforcement 6-Region IV
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'9 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011 Ogg ISOI1' b r' u.
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Reference:
Docket No. 50-285
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Dear Mr. Collins:
Item 3 of IE Bulletin 81-01, dated January 27, 1981, required a visual examination and operability test of all mechanical snubbers produced by manufacturers other than International Nuclear Safeguards Corporation (INC) that are installed on safety-related systems. The District's letter to the Commission dated March 27, 1981 stated these inspections and tests would be completed during Fort Calhoun Station's 1981 refueling outage. The examinations and tests on the eight (8) applicable mechanical snubbers were completed November 5, 1981 during the 1981 refueling outage and the results are addressed below.
Visual examinations and manual operability tests were perfortned on eight (8) mechanical snu"'rs manufactured by Pacific Scientific.
Four (4) of the snubbers, RF' JA, 'TS-114A, SIS-114E, and SIS-114F, were inspected in-place w.,istrict personnel at the Fort Calhoun Station.
The inspections involved a visual examination of the snubbers and their associated linkages and connections for apparent damage and an oper-ability test for freedom of movement. The test was performed by dis-connecting one end of the snubber from the support and manually pushing and pulling the snubber over the range of its stroke in compression and tension. The other four (4) snubbers, RCS-16, RCS-29, RCS-29A, and SIS-114B, were sent offsite for, examination and bench testing, in accordance j
with snubber surveillance requirements of the Fort Calhoun Station's Technical Specifications, Section 3.14.
In addition to functionally testing the snubbers, the test facility visually examined and manually tested the four (4) snubbers for operability.
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8112290401 811209' PDR ADOCK 05000285 O
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i Mr. J. T. Collins December 8, 1981 Page Two The results of the Pacific Scientific snubber inspections, as described above, are detailed in the attached report. The eight (8) snubbers were observed to operate satisfactorily over the range of stroke in both compression and tension and were in excellent physical condition.
These snubbers will continue to be periodically inspected and tested as required by the Fort Calhoun Station's Technical Speci-fications. The favorable results of the snubber inspections, in addition to the periodic testing requirements, should adequately address the Commission's concerns related to non-INC mechanical snubbers installed on safety-related systems at the Fort Calhoun Station.
Since, rely, N
W.C.lones y
Divis(on Manager Production Operations WCJ/KJM/TLP/RWS:jmm Attachment cc:
LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.
Washington, D.C.
20036 s
4 m
ATTACHMENT A Snubber Inspection F
St e
1S e
Numter Manufacturer Visual Remarks Tested in place.
Pipe clamp attached to Pacific RCS-3A OK Yes Yes snubber was loose on pipe.
M.0. written to Scientific tighten pipe clamp - Has been rectified.
Otherwise fine.
Pacific Sent to Wyle Laboratories for functional RCS-16 Scientific testing. All test results acceptable.
Snubber is in excellent condition.
Pacific Sent to Wyle Laboratories for functional RCS-29 OK Yes Yes Scientific testing. All test results acceptable.
Snubber is in excellent condition.
-i Sent to Wyle Laboratories for functional Pacific OK Yes Yes RCS-29A Scientific testing. All test results acceptable.
Snubber is in excellent condition.
Pacific Tested in place. Snubber is in excellent SIS-Il4A OK Yes Yes Scientific condition.
Pacific Sent to Wyle Laboratories for functional 5I5-1148 X
88 Scientific testing. All test results acceptable.
Snubber is in excellent condition.
Pacific Tested in place. Snubber is in excellent SIS-ll4E Or, Yes Yes condition.
Scientific Pacific Tested in place. Snubber is in excellent SIS-Il4F OK Yes Yes
. Scientific condition.
s