ML20058B145
| ML20058B145 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 10/17/1990 |
| From: | Crawford A PUBLIC SERVICE CO. OF COLORADO |
| To: | Weiss S Office of Nuclear Reactor Regulation |
| References | |
| P-90303, NUDOCS 9010290416 | |
| Download: ML20058B145 (3) | |
Text
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l h Public Service-aO.h P.O. Box 840 Denver CO 80201 0640 October 17, 1990 Port St. Vrain A. Clegg Crawford Unit i Vice President Nuclear Operatiom U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.
20555 ATTN: Mr. Seymour H. Weiss, Director Non-Power Reactor, Decommissioning and Environmental Project Directorate Docket No. 50-267 i
Subject:
Explanation of Decommissioning Cost Differences
REFERENCES:
- (1)
PSC Letter, Crawford to Weiss, dated May 1,
1990, (P-90124) 1 F
(2)
PSC Ietter, Crawford to Weiss, dated August 27, 1990, (P-90262) j a
Dear Mr. Weiss:
' I
'The NRC noted ' in conversations with Public Service Company of Colorado (PSC) that some confusion exists. between the projected costs for the SAFSTOR alternative identified in the Preliminary-Decommissioning Plan and the summary of projected costs for SAFSTOR presented in PSC's briefing to the staff on July 25, 1990.
The I
purpose of this letter _is to respond to the NRC's questions regarding the cost.difforences.
When PSC took Fort St. Vrain-(PSV) out of the rate base in 1986 a
-cost estimate for decommissioning was presented'to PSC's' Board of-
. Directors ' and a provision for the decommissioning of PSV wu'.
i established'.
This 1986 cost estimate was updated in 1988 io j
include the results of.a contractor's study which identified tae method to' dismantle the PCRV (reference 1).
The end result iras i
.that a liability account was established within PSC's account.ing system to address the defueling and decommissioning of FSV.
'!he i
amount of dollars estimated for the defueling and decommissioring in September 1988. Was $233 million in 1988. dollars but the liability account was established. based. on a not present valu'a of
961'o290416 901017 PDR ADOCK 05000267 I
$((
ND_
$159 nillion at September 30, 1998.
During the development of this cost estimate, PSC management decided to pursue the removal of PCRV components that were relatively easy to remove in conjunction with removal / decontamination of the contaminated systems. This. decision was based on two conditions; rapidly rising waste disposal costs and that it would be easier to remove, decontaminate or dismantle f.nese compone.nts and systems with a knowledgeable staf f.
As PSC continued to evaluate and update the decommissioning plan, it became clear that the removal of the steam generators and several of the internal graphite components were not acti ities that would L
be best pursued by PSC.
The contractor's study on the dismantlement of the PCRV (reference 1), addressed the expected contractor cost to remove the steam generators and these components.
The cost to remove these components was extensively
=
reduced because the contractor planned to remove the steam e
generators out through the top of the PCRV (in conjunction with the dismantlement of the PCRV) instead of the bottom as PSC had originally planned. Additionally, the removal of a steam generator had not been previously performed at FSV which would have mandated the development of specialized remote equipment to accomplish this task.
As a result, this work scope along with the removal of soveral graphite components was shif ted from the 1992 time frame to 2043 which resulted in a significant cost reduction.
This is the major reason for the decrease in cost from $233 million (the basis for the original provision on PSC's accounting books) to $198
- million, which was the amount delineated in the Preliminary Decommissioning Plan.
PSC is committed to maintaining open communications with the NRC and regrets any inconvenience and confusion this may have caused.
As indicated in reference 2, PSC is prepared to arrange a meeting g
to resolve any remaining outstanding questions on the Preliminary Decommissioning Plan should you so desire, at If you have any further questions related to the differences in the costs or PSC's letter please contact Mr. M. H. Holmes at (303) 480-6960.
very truly yours, a
G. &
bs Q A.
C. Crawford Vice President, Nuclear Operations ACC MJF/hs
---summmin mii mia nin
i s.
cc: Regional Administrator, Region IV ATTH:
Mr. J.B. Baird Technical Assistant Division of Reactor Projects Mr. D. Garrison Site Resident Inspector Fort St. Vrain Mr. Robert M. Quillin, Director Radiation Control Division Colorado Department of Health 4210 East lith Avenue Denver, Co. 80220 E
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