ML19322B577
| ML19322B577 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 09/18/1975 |
| From: | Parker W DUKE POWER CO. |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 7912040604 | |
| Download: ML19322B577 (1) | |
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Powra Butt.nt:<o REACTOR FACILITIES BRANCll
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WIL LI At4 O. PA R M E R, J R.
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Tctse=oest: Aarn 704 373 4053 Sirsi. Paoowevion S ptember 18, 1975 l
Mr. Norman C. Moseley, Director U. S. Nuclear Regulatory Commission Suite 818 230 Peachtree Street, Northwest Atlanta, Georgia 30303 Re: IE:II:TNE 50-269/75-1 50-270/75-1 50-287/75,-1
Dear Mr. Moseley:
My letter of August 1, 1975 provided a sn= nry of the resolution of problems associat'ed with the process radiation monitors at the Oconee Nuclear Station. It.vas reported that although good, consistent correlation between the particulate monitors RIA-43 and RIA-47 and laboratory samples has not been possible, the monitors have been shown to be reliable and capable of early detection of changing particulate actirity.
The correlation has not bee' possible due to the presence of high energy, beta-emitting, short half-lived materials, such as Rubidium-88, which affect.the particulate monito'r but decay before the laboratory analysis can be completed.
Presently, grab samples of the unit vent are only taken to establish the absolute level of activity corresponding to the count rate indicated on the particulate =onitors.
If the indicated count rate changes, new grab samples are taken to establish the new level of activity.
- Thus, even though correlation is not possible on a continuous basis, the particulate monitor is operable and provides reliable, qualitative indication of changing particulate activity. It is considered that the requirements of Technical Specification 3.10.7 are and will continue to be met.
Therefore, it is considered that this item be closed.
Very truly yours, 97 aP w William O. Parker, Jr.
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