ML20125B922
| ML20125B922 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 09/16/1974 |
| From: | Ballard R US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Muller D US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 9212100215 | |
| Download: ML20125B922 (9) | |
Text
__
OJ
/
d SEP 1 (
- Daniel k. huller, Assistant Director for Environn. ental Projects, L REV1LW OF AITLICANT'S PROPOSED 12iV11:OlMLNTAL TLCIUi1 CAL SPECIFICAT101 S FOR Tilt ID#t1CLLLO 14DCLIAR GLNLiudliiG PINiT PLAliT mal!C8 Honticello !!ucicar Generating Plant LICDiSIliG STACE: OL DOCFri s aLLR 50-263 KESP014SIbLC BlWICH Luvirotuental Projects branch No. 4 PMDJLCT WdiACER:
Roby revan DA'iE KLQUEST FICLIVQ LY LSD: Aubust 26, 1974 LLQULSI G C0l!PLET10d DATE: Septeinber 12, 1974 LLSCRIF110d Of RhSPodSot Tech Specs unacceptabic as proposed; recommsended changes enclooed as detailed cot:ments.
Ri. VIEW S1ATUS:
Lnviroamental Specialisto Branch - Complete As requestud, vc have reviewed the Environtaental Technical Specifications as, proposed by the applicant. The results of the review have indicated a number of deficient areas within the specifications which make thou unacceptabic as proposed. Specific wording changes have been made and these are enclosed as detailed cousents.
In making these changes, we have Lept the intent of each specification consistent t.o the extent practicabla vit.h Luc approach taken in the recently developed (4/74) 'Envirotunontal Technical Specifications for the Prairic Island Nuclear Generatinh Plant.
Tuio plant is also operated by the applicant and is located on the same river, althour,h approxin.ately 75-00 miles downstrcan.
A utunber of otuer deficiencies, in the fora of missing specifications, have been noticed. These are listed below. The applicant should be queationed on these subject areas and, where applicable, the applicant anould preparu a specification and inonitoring program, or special study for inclusion in the revised submission of Environneutal Technical Specifications.
o 1.
How will the cooling towers be kept cican, free from ocale and protected from corrosion or biological attack? Chetlical usage (types), application f requency, dischary,e concentrations, rate, and releasco should be provided.
2.
What corrosion inhibitors and amounts will be used in the prinary coolant syster? cotimato the leakubo rate to the secondary coolant systcc, the expected concentratiois, evaluntion of effecta and propoca a control on usu e as cither c.,,,c.,
9212100215 740916 PDR ADOCK 05000263 P
PDR,
f ATt #
foten AIC 31k (Rev,9 53) AlcM 0240 W u. s. novanmusNT PMlKflha CFFlCEI 1974 544.let
l vanici R. huller 2-SEP 161314 a maximam concentration to be muitored or a chemical inventory recora to be maintained with calculated concentrations to serve as a control.
3.
A cor.plete listing of all chemical types and acounts used in the plant chould be prepared for staff review.
4.
Provido a special study, of limited duration, for napping the thermal plum of the plant.
The results of this progran may load to reduced sainp3ing of other biological parausters once the position of the pitnaa is known under various conditions.
This review was conducted by John C. Lehr.
Origina1 signed b'y Ronald L Ballard Ronald L.-Ballard, Chief Environmental Specialists branch Directorate of Licensint 1:nclosurot As statud cct w/o enclosure t.. Gintibusso W. Mc;>onald Il I
J. Paur.arella Docket File 50-263 SS Dranch Cnicis LtRdg ces v/encloaure LIAD/SS U ESB S. hanauct F. Schroeder
- a. Loyd R. DeYouno V. Hoore TR Asst. Directors A. Kenneke W. Renan L. Ballard K. Levan J. Lolen J. ucur r
ome <
- L ES
_.. L JCLeh [fdk
..RLB inrd.
. w a,= =
- 7 9/13M4.
.9/A/74.
t,m..
Tutta AIC 316 (Ret. 9 5)) AEcht 0240 W u. e, oovenwus=, eninviwa omc ca i.74.s s.t.e l
COMMENTS ON PROPOSED MONTICELLO NUCLEAR GENERATING PLANT ENVIRONMENTAL TEC11NICAL SPECIFICATIONS Section 1.0 Definitions A.
Onsite l
Add "which is contiguous with the plant structures".
j l
H thru M Delete the present definitions and replace with:
Week:
A calendar period commencing on Sunday and extending through the following Saturday.
Month: Each of the twelve calendar periods designated as January, February, March, April, May, June, July, August, September, October, November, and December.
Year:
The calendar period commencing January 1 and extending through December 31.
Any other needed definitions of time periods should be defined in terms of those listed above.
Section 2.0 Protection Conditions i
2.1.1 Max AT Across Condenser in the Objective, add "during open cycle operation" to the end of the sentence.
Change the Specification to read:
"During open cycle operation, the AT r
i across the condenser shall not exceed 35'F for more than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. The 1
i P
t l
J.
l i
b i
]* i t
j yearly mean AT based on open cycle operating days shall not exceed 27'F".
j j
Change the Basis to read:
"The plant will operate in the closed cycle j
)
modo to the maximum extent practicabic.
The number of organisms likely j
to be lost in this code due to repeated mechanical and thermal stress is relatively low due to reduced appropriation of water.
Open cycle 4
1 j
operation is likely during winter months where, due to lower organism i
i concentration, impact is expected to be acceptable.- The protection
!j' condition will provide _a reasonable period of time for the repair of a i
i defective pump."
i
.l
.i i
j
'2.1.2 tbximum Discharge Temperature i
l Change the Objective to read:
"To limit the maximum temperature of the discharge water to protect the indigenous aquatic biota."
4 I
2.2 Hydraulic i
j 2.2.1 Flow Rate Restrictions' i
Change the Objective to read:
"To limit _the amount of water appropriated-for plant use, thereby minimizing the impact on aquatic biota through entrainment and minimizing the heat released to the river."
l n
Change the Specification to read:
"The _ plant cooling water system will-be operated in the closed cycle mode to the maximum extent practicable.
l During this operational mode, appropriation of river water is limited to makeup for evaporative losses and a maximum da'ily average blowdown of 36 cfs. When operating in open or helper cycles, appropriation of river i
water will not exceed 645 cfs when river flow is greater than 860 cfs a*. the t
1 s :.
i I
intake. When river flow is less than 860 cfs at the intake, the maximum i
allowable river water appropriation will not exceed 75% of the river flow at the intake."
i i
Change the Basis to readt
" Operation of the plant cooling water system
- l
}
in the closed cycle mode whenever weather conditions permit will greatly i
reduce the entrainment of aquatic biota. Open cycle operation is most 4
likely to occur during cold weather when aquatic biota concentrations are relatively low.
The specified restrictions on water appropriation 1
)
will protect the aquatic biota during parfods of low flow."
)
i 2.3 Chemical I
2.3.1 Chlorine i
j Change the Objective to read:
"To regulate the release to the environment t
of total residual chlorine used to clean the condenser and service water 1
system."
Change the Specification to read:
" Chlorination of plant systems shall be limited to a total of two hours per day. During chlorination periods, j
the total residual chlorine concentration at the point of discharge to the river shall not exceed 0.05 mg/1.
If chlorination is carried out for 4
30 minutes or less per day, the total residual chlorine concentratfor.
the point of discharge to the river shall not exceed 0.1 mg/1.
Corrective 1
action shall be taken if the protection condit' ion is exceeded.
11 chlorination of other plant elements is required, the same total time limitation and discharge concentrations apply."
k
.f'
v 1
4
- l i
)
1 l
4 i
23.2 Retention Basin Effluent Chemicals 1
in the Specification, delete the word "added" after "30 mg/1" and before
" Jackson Turbidity Units (JTU's)." Adds "No other chemicals will be i
released."
I J
5 2.3.3 EH j
Change the Objective to read: '"To limit the pH range of the effluent of the chemical retention basin."
J l
Change the Specification to read:
"The pH of the water released to i
the discharge canal from the retention basin shall be no lower thia 6.5 nor greater than 8.5."
3.0 lbnitoring Requirements i
3.1 Thermal b
3.1.1 Maximum Change in Temperature Across the Condenser _
j Add to the Objectivet
"...to insure that the AT does not exceed'the s
i protection condition."
i 4
Add to the first sentence in the Specification:
"...during open cycle operation." Also add to the Specificationt = During periods of deicing j
of the intake, the AT shall be determined as the difference in-temperature j
betweea the condenser outlet temperature and the_ ambient _ river water tecperature-unaffected by heated recirculated plant water. _The sensors
+
will be accurate to at least - 0.5'F."
l
.,. _,....,, ~..,., _.
.,4.-..,...-,--,.-..
1 i
l, 1 1
Change the Basis to read:
" Hourly measurement of temperature change between ambient water and condenser outlet water will provide sufficient i
information to make any needed changes to plant operation to assure compliance with the protection condition."
4 3.2 Hydraulic i
l 3.2.1 Flow Rate Restrictions j
Change the Specification to read: "During closed cycle operation, the discharge structure will be adjusted such that the daily average blowdown will not exceed 36 cis. The river flow at the intake and the amount of water appropriated will be recorded determined and recorded daily."
3.3 Chendcal i
i 3.3.1 Chlorine in the objective, Specification, and Basis, replace " free chlorine" with
" total residual chlorine." After the fourth sentence in the Basis, add l
"This testing will be carried out daily until the feed rate curves for the season are established."
3.3.3 pH Change the Objective to read:
"To measure the pH level of the retention.
basis effluent prior to release to the discharge canal."
Change the Specification to read:
"The pH value of the retention basin effluent will be determined prior to each release.
The pH will be brought to within the protection condition limits prior to release."
J d
l
l 1.
I
]* i I
j Change the Basis to read:
" Measurement of the retention basin effluent j
prior to each release will provide assurance of compliance with the protection condition."
4.0 Environmental Surveillance and Special Studien 1
l 4.1 Biological l
A.
General Ecological Study I
In paragraph #1 in the Basis, add to the last sentence:
"...as determined by the Regulatory staff."
4 1
{
General Comments on the varioua proposed-studies are as follows:
1 j
Periphyton - the single sacpling locations should be replaced by l
transects across the width of the river (with the exception of the 1
station at the end of tha discharge canal). The control station does not include both flow paths of the river above the plant.
Another control transect should be established in the other flow l
channel. There should be a minimum of three sampling locations along each transect.
Benthic theroinvertebrates - the same comment may be made about the.
control transect in this study as in the periphyton study.
1 4
Fish - the general location for fish sampling and the frequency of sampling should be indicated in the ' description.
i 3
a
=.
i h l I
Physical and Chemical Water Quality Parameters - all quarterly l
frequencies should be changed to monthly. The downstream sampling l
should be done along a transect (with a minimum of three sampling
]
points), not at a single point and all sampling should be done at i
three depths, i.e., sub-surface, mid-depth, and bottom.
B.
Impinged and Entrained Fauna 3.
Entrainment - the monthly sampling f requency should be increased 1
to weekly or daily during periods of high populations as indicated either by the control. stations or by the experimental stations.
i i
?
2
}
0 1
f-
.... -