ML20072G413
| ML20072G413 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 06/23/1983 |
| From: | William Jones OMAHA PUBLIC POWER DISTRICT |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.B.3, TASK-TM LIC-83-147, NUDOCS 8306280487 | |
| Download: ML20072G413 (3) | |
Text
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Omaha Public Power District 1623 Harney Omaha. Nebraska 68102 402/536-4000 June 23, 1983 LIC-83-147 Mr. Robert A.
Clark, Chief U.
S.
Nuclear Regulatory Commission Of fice of Nuclear Reactor Regulation Division of Licensing Operating Reactors Branch No. 3 Washington, D.C.
20555
Reference:
Docke t No. 50-285
Dear Mr. Clark:
NUREG-0737, Item II.B.3 Post-Accident Sampling System Omaha Public Power District's letter to the Commission dated December 1, 1982 identified software problems with the Post-Accident Sampling System (PASS) microprocessors at the Fort Calhoun Station.
The ongoing problems with the l
system's on-line pH meter were also noted, as were efforts to resolve these problems.
l l
Upon solving the software problems, system testing re-sumed.
However, additional problems were encountered with system sample flow.
It was discovered that insufficient sample flow existed due to high flow resistance in the sample system tubing.
In order to do complete trouble-shooting of the entire system, the reactor coolant system must be at operating pressure.
As the District's refueling outage commenced a month early (making the troubleshooting impossible), the District, in a letter to the Commission l
dated December 17, 1982, revised the scheduled operational date to three months after the end of the 1983 refueling outage.
Upon reviewing the District's justification, the Commission issued its Order dated March 14, 1983 which required that the PASS be fully operational by the end of June, 1983.
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Mr. Robert A.
Clark LIC-83-147 Page Two-During the 1982-1983 refueling outage, the flow problems were analyzed and it was determined that extensive hardware changes would be required to overcome ' the flow re-sistance problems.
These changes includedithe addition of three booster' pumps, flow indicators, level switches, pres-
- sure control valves, and other miscellaneous items.
The programmable controller software also was revised to accommo-date these changes.
Because of procurement delays beyond the District's control,.the hardware modifications have only recently been completed.
Functional testing.is expected to be complete by the end of June.
Additionally, procedural modifications to accommodate the new hardware must be completed and approved.
Ene - District estimates six weeks to complete this task.
It should be noted that these procedural changes are dependent upon the final configuration of the system which remains dependent on theLresults of system testing.
Training for operators must also be completed prior to considering the PASS fully operational.
.This task is estimated to require an additional six weeks for completion, primarily because of its dependence on the procedures referred to above.
In
-order to allow time to complete functional testing, pro-
~
cedural modificationsiand personnel training, the District
-therefore requests a three' month extension-to the completion schedule.
In previous correspondence, the District. identified its' continuing problems;with the Ion Chromatograph.
The Ion
" Chromatograph is to be used as.part of the' PASS for simul-taneous boron and chloride analysis.
Representatives from Dionex (the vendor) have been actively working with District personnel in an attempt to resolve the remaining problems.
Since.the root causes of and solutions to the problems with the Ion Chromatograph have not yet been identified, the District, at this time,'is unable to establish a firm date for completion of-the Ion Chromatograph.
Considering the high priority given to this ' task and the -resources being devoted to resolving"the problems with the Ion Chromatograph,-
the District anticipates the unit will be functional by October 30, 1983.
When the remaining items mentioned above (i.e., test-ing, procedure modifications, and training) are completed, Ethe. PASS can be considered fully operational,-with the
e Mr. Robert A.
Clark LIC-83-147 Page Three exception of the Ion Chromatograph.
Until the Ion Chromato-graph becomes operable, the District will continue to use its interim methods for boron and chloride analysis detailed
^
in our letter to the Commission dated December 3, 1982.
The new proposed completion schedule for the PASS (except for the Ion Chromatograph) is September 30, 1983.
Sincerely, W. C./ ones Divisi n Manager Produ$ tion Operations WCJ/TL?:jmm cc:
LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.
Washington, D.C.
20036 Mr.
L. A. Yandell, Senior Resident Inspector l
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