ML20070Q247
| ML20070Q247 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 03/22/1991 |
| From: | Gates W OMAHA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| LIC-91-042R, LIC-91-42R, NUDOCS 9103280278 | |
| Download: ML20070Q247 (2) | |
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Omaha Public Power District 444 South 16th Street Mall Omaha, Nebraska 68102-2247 402/636-2000 March 22, 1991 LIC-91-042R V. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station Pl-137 Washington, DC 20555
References:
1.
Docket No. 50 285 2.
Letter from 0 PPD (W. G. Gates) to NRC (Document Control Desk) dated May 16, 1990 (LIC 90-0247) 3.
Letter from OPPD (W. G. Gates) to NRC (Document Control Desk) dated January 7, 1991 (LIC-90-1034)
Geatlemen:
SUBJECT:
Status of the Post Accident Sampling System (PASS)
In Reference 2, Omaha Public Power District (0 PPD) committed to informing the NRC if sampling sequences of the PASS were not operable by the dates specified in that reference.
In Reference 3, OPPD provided the NRC detailc of problems encountered with the Post Accident Sampling System (PASS) sampling sequence for primary coolant dissolved gas quantity, and the expected completion date for the work that would rectify this problem.
While attempting to resolve the prchlem, complexities beyond those anticipated were encountered with respect to the ability to duplicate the final values.
As an example, the current sampling sequence allows the technician and chemist to make a number of assumptions which allow additional degrees of freedom in the process.
OPPD is requesting the architect / engineer and PASS supplier to review the design basis methods and current procedures used for the dissolved gas measurement.
In addition, the gas equations and sample sequences would be reviewed.
It is anticipated that these reviews would be accomplished by May 31, 1991. A verification testing phase would then be implemented with anticipated completion by July 31, 1991, at which time a full implementation schedule would be developed.
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U. S. Nuclear Regulatory Commssion LIC-91-042R
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If you should have any questions, please contact me.
Sincerely,
&, J. /%4 W. G. Gates Division Manager Nuclear Operations WGG/sel c:
LeBoeuf, Lamb, Leiby.& MacRae R. D. Martin, NRC Regional Administrator, Region IV W. C. Walker, NRC Project Manager R. P. Mullikin, NRC Senior Resident Inspector
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