ML19308B474
| ML19308B474 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 02/08/1979 |
| From: | Herbein J METROPOLITAN EDISON CO. |
| To: | Galen Smith NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML19308B473 | List: |
| References | |
| GQL-0204, GQL-204, NUDOCS 8001030236 | |
| Download: ML19308B474 (2) | |
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< - ar ~,u METROPOLITAN EDISON COMPANY suosicianyoracnenat rusticuritiriesconeonarion POST OFFICE BOX 542 READING, PENNSYLVANI A 19603 TELEPHONE 215 - 929-3601 February 8, 1979 GQL 0204 Mr. George H. Smith, Chief Fuel Facility and Materials Safety Branch U.S. Nuclear Regulatory Commission Region 1 l
631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Sir:
Three Mile Island Nuclear Station, Units 1 & 2 (TMI-1 & TMI-2)
Operating License Nos. DPR-50 and DPR-73 Docket Nos. 50-289 and 50-320 Combined Inspection 50-289/78-18 and 50-320/78-31 The following information is provided in response to your letter of January 29, 1979, Combined Inspection 50-289/78-18 and 50-320/78-31.
As previously stated in Met-Ed's letters of June 1,1978 and December 22, 1978, it is Met-Ed's position that the item of noncompliance identified in Inspection Report 50-289/78-06 was not warranted for the following reasons:
a.
The contact dose rates were measured to be 9R/hr with the template in place.
b.
The whole body dose rates were measured to be a maximum of SR/hr.
The extremity dose to whole body dose ratio was a maximum of 2 based on c.
the readings.
d.
The whole body dose is administratively limited to 1 Rem / quarter without written permission.
e.
By administrative 1y limiting the whole body dose to 1 Rem / quarter, the maximum quarterly extremity dose was therefore limited to 2 Rem / quarter.
To more clearly explain our position and to answer ehe questions in your letter of January 29, 1979, the f ollowing information is provided:
a.
Although the general area dose rate was measured to be SR/hr and the maximum contact dose rates were measured to be 9R/hr with the template in place, the maximum whole body dose was administrative 1y limited to 1 Rem / quarter.
Therefore, with. an extremity dose to whole body dose ratio of 2, the maximum extremity exposure that any individual could have received would have been 2 Rem in the calendar quarter.
8001030~236
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'Geo'rge H.' Smith, Chisf February 8, 1979 GQL 0204 b.
The tube sheet surface is approximately 50% metal and 50% holes. The teletector probe is of sufficient size to provide the dose rate from both the tube sheet and the tubes when a survey is taken with the probe in a horizontal position. Therefore, the teletector reading is assumed to be a true indication of the dose rate.
c.
The individuals involved in the Steam Generator Inspection by procedure installed the template prior to entering or walking on any bare tube sheet. The exposed area of the tube sheet which was not covered by the template consisted of a 2 to 3 inch border around the outer edge of the generator which, due to the dome-shaped generator, could not be walked on.
However, surveys with a teletector prior to installation of the template indicated penetrating radiation levels similar to those with the template installed (approximately 9R/hr). Therefore, extremity monitoring would not be required even with the template removed.
During the next refueling outage, scheduled to begin on February 17, 1979, it will again be necessary to inspect the steam generators. Experimental data will be obtained during the inspection to further evaluate the radiation environment within the steam generators. This experimental data will be available on site for future reference.
This letter is submitted on this date, per the February 5,1979 telecon between the NRC's Mr. H. W. Crocker, and our Mr. M. R. Buring.
Sincerely,
/
l J. G. Herbein j
Vice President-Generation JGH:WSS:tas 4
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