ML17252A267
| ML17252A267 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities  |
| Issue date: | 12/07/1976 |
| From: | Abrell G Commonwealth Edison Co |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| Download: ML17252A267 (2) | |
Text
~CommonweaAEdlson One First Nalion7'Waza, Chicago, Illinois *
- Address Reply to: Post Office Box* 767 Chicago, Illinois 60690 December 7, 1976 H\\egulatoi'y Docket File Director of Nuclear Reactor Regulation Attn:
Mr. Dennis L. Ziemann, Chief Operating Reac~ors - Branch 2 Division of Operating Reactors
- u. S *. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
I Dresden s*tation Units 2 and 3 QUad-Cities Station Units 1 and 2 Spent Fuel Storage Addition
(
NRC Docket Nos. 50-237/249 and 50-254/265 Reference (a) :
G. J. Pliml Letter to D. L. Ziemann date ir.
September 2.9, 1976 - NRC Docket Nos *
. 50-237/~49 and 50-254/265.
Dear Mr. Ziemann:
Mr. Silver of your_ Staff recently requested. conf irma,""'(,.,*,-~::,._,r;;-q of the co-60 levels in the Dresden fuel pools and the surface rate calculations found on page B-8-2 of the enclosure to Reference (a)
- The co-60 levels in the Dresden Units 2 and 3 fuel pools were appar'ently in_ error.
Subsequent isotopic analysis of fuel pool samples indicates that the co~60 levels are the same order of magnitude as that of the Quad-Cities fuel pool.
Recent samples revealed the following concentrations:
Dresden Unit 2 Dresden Unit 3 co-60
- 8.8 x l0-5 uc/ml
- co-60 2.5 x io-4 uc/ml The Dresden Unit 3 levels are higher because of the recent activity associated with the refueling outage.
The dose rate calculation which* appears on page B-8-2 is fi:>r the Quad-Cities pool concentrations, but is the same order of mag-nitude as for Dresden.
Actual working dose rfites oh.. the operating.
floor at Dresden are about 1 mrem/hour although slig}ltly higher dose rates are seen on the refueling bridge.
These dose rates are about
~'
5 mrem/hour and.are probably due in part to contaminated tools on the platform.
12592
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.monwealth Edison Company 9 Mr. Dennis L. Ziemann 2 -
December 7, 1976 One (1) signed original and 39 copies are provided for your use.
G~ A. Abrell Nuclear Licensing; Administrator Boiling water Reactors i
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