ML19256D084
| ML19256D084 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 12/16/1975 |
| From: | Harold Denton Office of Nuclear Reactor Regulation |
| To: | Goller K Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7910160804 | |
| Download: ML19256D084 (3) | |
Text
S DEC 16 '375
.j-Karl R. Coller, Assistant Director for Operating Reactors Branch, EL DRCOGING PE2MIT - T' REE MILE ISIXD d
As required by Technical Specifications, the Three Mile Island Unit 1 applicant performs hydrographic surveys at the intake structuras on the Susquehanna River to detect any accumulations of sediment
. that. could potentially block the intakes. The applicant is then required to remove any build-up of sediment detected in the survey program.
Sediment buildup at the intake has been reported as an operational incident.
It has come to our attention that the applicants are required to obtain a permit from the Corps of Engineers in order to perform remedial dredging in the Susquehanna River. We further understand that a separate permit is required each time the dredging needs to be done.
We consider the intent of the Technical Specifications is for remedial maintenance to be accomplished immediately af ter any adverse accu =ulation has been detected.
Since the intakes and the Susquehanna River are the only source of emergency cooling water, we consider it imperative that the remedial dredging be accomplished very quickly.
- However, a period of many months could elapse between the time the applicants apply for a permit and the time the permit is granted by the Corps; during this time the water level in the river could possibly recede such chat the sediment buildup may segregate the intakes from the required cooling, water.
We recommend that measures be instituted to have the applicants secure a permit from the Corps of Engineers to perform minimal remedial dredging in the Susquehanna River on an "as needed" basis. With such a permit, the applicant would not have to apply each time for a permit, the necessary maintenance dredging could be accomplished in a timely manner, and an adequate safety-related water supply could be assured at all times. The permit should also apply to Unit 2, currently under construction.
Ori inal Siped by t
H. R. Osntu Harold R. Denton, Assistant Director for Site Safety Division of Technical Reviev Office of Nucleae Reactor Regulation ec:
See next page 1446 104 7 910160 g
W Karl R Goller, Assistant Director, for Op ating Reactors Branch, RL DRGGING PEA T - THREE MILE ISLA.D As required by chnical Specifications, the Three Mile Island Unit 1 applicant rfor=s hydrographic surveys at the intake structures on the Susquehanna ver to detect any accumulations of sediment that could potential block the intakes. The applicant is then required to remove any uild-ups of sediment detected in the survey program.
Sediment build at the intake has been reported as an operational incident.
It has come to our attention at the applicants are required to obtain a permit from the Corps f Engineers in order to perform remadial dredging in the Susqueh a River. We further understand that a separate permit is require ach t1=c the dredging needs to be done.
We consider the intent of the Technical pecifications is for remedial maintenance to be accomplished immediatet after any adverse accu =ulation has been detected.
Since the intakes and e Susquehanna River are the only source of emergency cooling water, e consider it imperative that the remedial dredging be accomplished ve quickly. However, a period of many months could elapse between th time the applicants apply for a permit and the ti=e the permit is us by the Corps; during this time the water level in the river could poss ly recede, such that the sediment buildup segregates the intakes from th required cooling water.
We recommend that measures be instituted to have the app cants secure a permit from the Corps of Engineers to perform remedial edging in the Susquehanna River on an "as needed" basis. With suc a permit, the applicant would not have to apply each ti=e for a permit, the necessary maintenance dredging could be accomplished in a time v =anner, and an adequate safety-related water supply could be assured at 11 times. The permit should also apply to Unit 2, currently under e nstruction.
Harold R. Denton. Assistant Director for Site Safety Division of Technical Review Office of Nuclear Reactor Regulation ce:
See next page
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