ML20071L436
| ML20071L436 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 08/27/1982 |
| From: | Kane W Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20071L431 | List: |
| References | |
| NUDOCS 8209220060 | |
| Download: ML20071L436 (2) | |
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AUG 2 71982 ENVIRON!! ENTAL IMPACT APPRAISAL BY THE DIVISION OF LICENSING SUPPORTING AMENDMENTS NO. 6 TO CPPR-126 AND CPPR-127 RELATING TO CHANGE IN ALLOWABLE GROUNDWATER WITHDRAWAL RATE C0;'ANCHE PEAK STEAtt ELECTRIC STATION UNITS 1 AND 2 DOCKET N05. 50-445 AND 50-446 BACKGROUND The HRC staff initially evaluated the environmental inpact of withdrawing groundwater for the Comanche Peak Stean Electric Station, Units 1 and 2 (CPSES) during the construction permit stage of review.
In order to minimize the adverse environmental impact that punping of groundwater could have on neighboring offsite wells, the construction permits for CPSES were conditioned to restrict groundwater withdrawals as recommended in the Final Environmental Statenent issued June 1974. Condi tion 3.E(8) of Construction Permit CPPR-126 and CPPR-127 provided in pertinent part that:
"The rate of groundwater withdrawal during construction of the facility shall not exceed 250 gps. Withdrawal of groundwater shall be reduced to an annual average of 30 apa at the end of 5 years."
The construction permits were received by the Applicants, represented by the Texas Utilities Generating Company (TUGCO), in Decenber 1974; thus the 5 year 250 gpm limit would have expired in Deceaber 1979. However, prior to the expiration date.
TUGC0 requested and the NRC granted in Amendment No. 2 to CPPR-126 and CPPR-127, an extension of the 250 991 rate for an additional year to December 1980. This extension was requested because of construction delays. Since that tine, TUGC0 has been restricted to a pumping rate of 30 gpa.
PRESENT CONDITIONS TUGC0 Dy letter, dated July 26, 1982, has requested that the NRC anend Condition 3.E(8) to increase the allowable annual average from 30 gpm to 40 gpm. These amendnents are again being requested because of construction delays. The URC, by an Order, dated April 30, 1982, extended the latest completion dates for the CPSES by 48 months. The latest completion date for Unit 2 of the CPSF.S is now August 1, 1987.
ENVIR047tENTAL ASSESSMENT Because construction has not proceeded as originally scheduled, TUGCO's groundsater withdrawal rate has been considerably less than what was anticipated at the oegi nning or con s truc ti on.
ouring tne 6 years period in whicn a 2 30 gp, rate j onoS author.1 zed..(ilecembar..1.974.~Deconnur. 1930)... 4..totd..of. 4,5L.x.. lo.8..ga11ons..of..
8209220060 820827 PDR ADOCK 05000445 A
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r AUG 2 71982 June 1982, an additional 2.1 x 10ge rate of 147 gpm. From January 1981 through water were withdrawn for an avera gallons were withdrawn for an average rate of 27 gpm. During this time an average rate of 30 gpn was authorized. The total s
anount of water withdrawn as of June 1982 was 4.78 x lo gallons.
Initially TUGC0 was authorized to withdraw 250 gpq for a period of S years and 30 gpm thereafter. Withdrawal of 250 gpn for the initial 5 years would have resulted in a total withdrawal of 6.57 x 108 gallons. As stated above, as of 8
June 1982, only 4.78 x 10 gallons had been used.
Increasing the pumpage rate 7
from 30 gpm to 40 gpa for an additional 5 years would add about 2.63 x 10 gallons to the groundwater to be withdrawn between now and the latest construction completion date for CPSES.
Withdrawing groundwater at a rate of 40 gpn would result in a total of 1.05 x s
lo gallons over a 5 year period. Adding this entire anount to the amount that has already been withdrawn (4.78 x 108 gallons) results in a total of 5.33 x 108 gallons. Even this amount is less than the 6.57 x 108 gallons initially authorized for the first five years of construction.
The staff has determined that increasing the pumpage rate fron 30 gpm to 40 gpn could result in an additional 0.6 f t of drawdown at the site boundary after 5 years. Drawdown at offsite wells should be less because they are further away from the si te.
The staff concludes that increasing the authorized groundwater pumping rate from 30 to 40 gpm for a five year period will not create adverse environmental conditions for owners / users of offsite neighboring wells because the increase in groundwater level drawdown will be small (less than 0.6 f t).
Additionally, the total amount of groundwater that will be pumped during construction will not lic increased over the allowable total evaluated in the Final Environnental Statenent issued June 1974.
It will actually be a lesser amount, but over a longer period of time. Therefore the HRC staf f agrees that condition 3.E(8) of CPPR-126 and CPPR-127 l
be modified as requested to allow an annual average pun 91ng rate of 40 gpn for the duration of construction.
CONCLUSIONS l
On the basis of the foregoing analysis, it is concluded that there will be no
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environnental inpact attributable to the proposed action other than has already l
been predicted and described in the Commission FES for the Construction Pernit.
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Having viade this conclusion, the Commission has further concluded that no l
environmental inpact statenent for the proposed action need be prepared and l
that a negative declaration to this ef fect is appropriate.
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