ML20024D880
| ML20024D880 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 08/02/1983 |
| From: | William Jones OMAHA PUBLIC POWER DISTRICT |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.D.1, TASK-TM LIC-83-182, NUDOCS 8308080335 | |
| Download: ML20024D880 (2) | |
Text
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Omaha Public Power District 1623 Harney Omaha. Nebraska 68102 402/536-4000 August 2, 1983 LIC-83-182 Mr. Robert A.
Cla rk, Chief U.
S.
Nuclear Regulatory Commission Of fice of Nuclear Reactor Regulation Division of Licensing Operating Reactors Branch No. 3 Washington, D.C.
20555
References:
(1)
Docke t No. 50-285 (2)
Letter from W.
C.
Jones to R.
A.
Clark dated December 30, 1982 (LIC-82-415)
(3)
CE Letter CE-82-837 to the Safety and Relief Valve Subcommittee (CEOG) dated December 22, 1982
Dear Mr. Clark:
NUREG-0737, Item II.D.1 Safety and Relief Valve Test Program This letter is to provide an update of the modification and analysis work being done by the Omaha Public Power District on safety and relief valve discharge piping stress due to valve opening.
Based on analysis performed by Combustion Engineering, the l
PORV's may lift as a result of operational transients.
l Analysis of the resultant discharge piping stresses, per-formed by the District during the 1983 refueling outage, l
indicated that an overstressed condition could exist if a PORV were to open during operation.
This is in spite of the mz fact that a PORV has in the past opened during operation without any detectable damage to the discharge piping.
Based on the District's analysis, several modifications were i no acade to the PORV discharge piping and supports to reduce G$
possible stresses to acceptable levels.
These modifications Qg were made prior to startup from the 1983 refueling outage.
no OO At the present time, the District is completing an analysis
. g<
of the safety valve inlet and discharge piping.
This piping om could also be overstressed in the unlikely event of a safety
$$a valve opening.
Modifications to the safety valve inlet and discharge piping are currently in the design stages and are scheduled to be completed during the 1984 refueling outage.
f' 4s sl24 Employment with Equal Opportunity y
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6
Mr. Robert A.-Clark LIC-83-182 Page Two The District's justification for continued operation remains the same as was summarized in Reference (2) and detailed in Reference (3).
Sincerely, W.
C.
Jones l
Divi jon Manager j
Produ'ction Operations WCJ/DJM:jmm cc:
LeBoeuf, Lamb, Laiby & MacRae 1333 New Hampshire ~ Avenue, N.W.
Washington, D.C.
20036 Mr.
E.
G.
Tourigny, Project Manager Mr.
L.
A.
Yandell, Senior Resident Inspector l