ML19295C007
| ML19295C007 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 11/14/1974 |
| From: | Oconnor P US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Goller K US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19295C002 | List: |
| References | |
| NUDOCS 8010150708 | |
| Download: ML19295C007 (3) | |
Text
.
v
(*
,pj [q,,h UfUTCD STATES
'l
,' d / g ATOMIC ENERGY COMMIS510N wasmsc.rcy. o c. n c.
) U 'U (
Novenber 14, 1974
[
' tw,s
~
Docket No. 50-10 Rarl R. Coller, Assistant Director for Operating Reactors, L Dennis M. Zi,emann, Chief Operating Reactors Branch f2, L L
TilRU:
/'.)pr w p.ettv -
DECONT/J41NAT10N OF' DRESDEN U'ilT 1 - PRIMARY COOLANT SYSTEM INTRODUCTION _
Comonwealth Edison has requested a teeting with Licensin;; to provide a preliminary status report of their plans to chenically decontaminate Co monwealth wants to the primary cool. ant system at Dresden Unit 1.
The decontamination i'dentify the scope of the licensing concerns involved.
i d
program is scheduled for the Fall 1976 refueling outage and is antic pate to require nine conths for completion.
The pu'rpose of the decontamination is to recove a deposition of activated Radiation levels corrosion products.from the pricary coolant systen.
h in areas adjacent to portions of the prinary coolant systen are in t e range of 1 R/hr to 4 R/hr and prevent access to these areas for sufficient be required.
time to carry out in-service inspections that would otherwise The in-service inspection program subaitted by Conconwealth Edison on exeapts from volunetric. inspection 46 out of 65 f
tial January 25, 1973 nocale to vessel welds,18 out of 66 dissimilar retal welds, 2 circum eren vessel welds, and the steam drum circumferential and longitudinal welds.
17, 1973 that the inspection of k'e agreed by letter dated Septenber
- However, these velds was impractical for the 1973 in-service inspection.
we requested that Commonwealth provide us with a discussion of neans to be taken to nake the inspections in these areas practical inConnonwealth informed On November 29, 1973 subsequent inspections.
us that they were actively developing a program to decontaminate the 1>-1 pritary systca.
STATUS OF D-1 DECONTIC4INATION PROGRAM _
'--Commonwealth Edison s decontamination progra has progressed to the their plans to they feel that they would like to present f
i extent that thcSRegulatory staff in order ~to establish the scope of licens ng
-~~
concerns involved it3 the implementation of the program.
..JJ J 8010150 7 o p
e 5
_2-The price contractor for the proposed decontamination is the Dow Chemical Company uith the actual decontanination work being subcontracted to Suntac :;uclear Corporation.
Dow has developed a proprietary solvent which has dencastrated a decontacination factor of 100 on contaninated sanples taken fron the Dresden 1 primary Lystem.
LICENSI!;C CONCEPl;S IDEt;TIFIED BY C0:"l0: UEALTH EDISON 1.
The decontamination of the prinary system will generate more than 100,003 gallons of chemical and radicactive waste.
This waste will have to be disposed of in a nanner that is environmentally acceptable.
2.
Licensing approval vill be required to change the chenistry linits for the reactor vessel and the prinary coolant systen.
3.
Licensing changes will be requested to permit the temporary storage of an estimated 3000 Ci of corrosion products in above ground storage tanks.
4.
Additional excaptions from the existing in-service inspection program nay be* requested for the Fall 1975 refueling outage.
TEI;fATI'.*E SCHEDULE PROPOSED BY C03210NUEALTH EDISON Novenber 26, 1974 CE has requested a meeting to identify the scope of Licensing concerns and requirements.
January 1975 CE will subnit a request to Licensing for, authorization to carry out the decontanination program.
June 1, 1975 CE's requested date for Licensing approval.
June 1975 CE places orders for equipaent and decontamination facilities.
September 197 6 Dresden 1 shut down to begin decontanination.
'anuary 1977 nadwaste. facility for decontne.inaci n solutica's
~
~
complored.
Q b
~-
w
.. sm
-=.
ee
=
U
. June 1977 Dresden 1 returns to operation s
P5ul W. O'Connor Operating Reactors Branch f2 Directorate of Licensing
~
T. J. Carter P. O'Connor D. L. Zie2 ann R. M. Diggs s
e e
e 9
e O
e e
E.O
~,
.I
= ~ _ _-- ~,
y -, _ -
=
e=
e w w
.w W
dM O"
.4 4
9