ML19344B381
| ML19344B381 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 11/04/1976 |
| From: | Abrell G COMMONWEALTH EDISON CO. |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19344B371 | List: |
| References | |
| NUDOCS 8010080737 | |
| Download: ML19344B381 (4) | |
Text
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'7 N Commorr'.blilth Edison
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,[
_ '] Address Reply to: Post Office Box 767
< one Fwst Na.a.vl Plaza. Chicago. Uhnois
-(w/
v Chicago. Illmois 60690 November 4, 1976 Mr. Dennis L. Ziemann, Chief
, Operating Reactors Branch 2 Division of Operating Reactors U.S. Nuclear Regulatory Commission Washington, D.C.-
20555-
Subject:
Dresden Station Unit 1
.High Pressure Coolant Injection (HPCI)
System, NRC Docket No. 50-10 t
Dear Mr. Ziemann:
This_ letter,is in response to the letter from Mr. Goller, dated August 5, 1974,1 requesting a progress report every three months _ starting November 5, 1974.
This is report No. 9.
l I
The work at the location of the new HPCI building has 4
progressed to the_ state where an old structure and equipment were removed, the building excavation completed, and a wall of shield blocks placed around the nearby radwaste tanks.
The excavation had to be deeper than originally planned in order to reach bedrock.
The shielding of the radwaste storage tanks made possible a good c
direct radiation survey of the HPCI construction site.
This survey unfortunately revealed-that the HPCI construction area is somewhat contaminated.
This includes not only the soil but also the top of some of the bedrock in the HPCI excavation'.
We are ship' ping. contaminated soil to a burial site and are attempt-ing to obtain core _ borings in the area to determine the extent i
of the' problem.. Unfortunately legal and' nuclear insurance problems
.are delaying the core borings.
The contamination has stopped the
)
HPCI construction. work and may seriously delay the HPCI job.
When the core borings are obtained~and evaluateo. for' radiation, we may consider relocating the HPCI building in order to minimize the impact of the-contamination problem on the.HPCI construction schedule.
We had previously planned to shield the-construction area from.the radwaste tank radiation and to place the area outside i
of-a new security fence in order to reduce construction time and' cost.-
The'recently discovered contamination ~may disrupt this plan.
Based on the HPCI to primary system tie-ins following the decontamination of_the primary system, it currently looks like the HPCI system will be completed in~about June, 1978.
Because of all the changes, design problems, equipment and construction delays,a new cost estimate was compiled.
The new cost estimate l
is about $12,000,000, which is almost double the current budget l
l1 8010080 7 3#2
~-
Mr. Dennic L. ~ Zier'.J.i.4n -
-. 2 -
b.
November 3, 1976-
-for the~HPCI system. :The above schedule and budget do not~ include all of.the effects of the recently: discovered contamination problem.:
' Further progress was made in the procurt 'nt of equipment.
The status of the various_ components of the HPCI s,'rtem is given in Table No.'l'_(attached).
Very truly yours,
. Sf> \\ '
..,- <- < < r w f, G. A. Abrell Nuclear Licensing Administrator Boiling Water Reactors Attachment I
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- R. s T ble No. 1 - Dresden Unit 1 HPCI Equipment Status
~ Item.
Status-PStructural' Work
-: Contract awarded. Work in progress.
' iNon-Destruetive. Testing Contract awarded.
' Piping andl Installation New specification written and reviewed.
Large Valves-Purchase awarded.
Spec.' addendum-for additional valves; written.
. g~.c Sanll Valves Purchase awarded and. manufacture cc.pleted. Writing Spee. fer additional vali! s.
Oil' Storage Tank Purchase awarded, spec. addundum written.
Pumps Purchase awarded.
A3 tors Purchase requisition written.
~3esel. Generators Purchase ~ awarded.
Yster Storage Tank
. Bids evaluated and purchase requisition issued.
Main Control Room Panels Out for bids.
( Addendum being writ. ten).
T 1:csl Instrument Racks Bids received and under evaluation, p
'N Diesel Gen. Service Water Pumps
' Purchase requisition issued.
M 011 Day Tanks Purchase awarded, spec. addendum written.
O l-Ittor Control Centers Purchase requisition written.
y 4170 V Switchgear Purchase requisition written.
[59 c)
M 460 V Transformers Bids received and under evaluation.
D DC Dietribution Panels
'Out for bids.
( Addendum issued).
h
,atteries Bids received and under evaluati:n.
( Aadendu::- 1. sued ?.
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Item:
Status 2 Cablest( 700V)
Specification written and reviewed.
Ccbles. ( $_KV ).
' Specification written and reviewed.
i Battery l Chargce Bids received and under evaluation. ( Addendum issued).,
Cables (Instrucentation)'
Specification written and' reviewed.
Cable' Trays Specification written and reviewed.
Hil..
Electrical-Penetration. Assemblies-
, Specification being written.
'llVAC Work Out for bids, O Vant Fans Purchase requisition issued.
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