ML19317H211
| ML19317H211 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/17/1975 |
| From: | ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19317H209 | List: |
| References | |
| NUDOCS 8005010867 | |
| Download: ML19317H211 (7) | |
Text
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300 5 010 NyllQ i
4-12
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Fish may be disposed of through the trash grinder and discharged into the outfall as long as the dissolved oxygen, as measured per Specification 4.1.1.a. (3) (c), is 5.5 mg/l or greater.
When grinding operations are d13 continued as a result of the dissolved oxygen measurements taken per Specification 4.1.1.a. (3) (c), grind-ing will not be resumed until those measurements read 6.0 mg/l or higher, g.,f 7. pf Reporting Requirements:
Monthly tabulations of quantity and weight by species for each 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> sample will be reported to the Nuclear Regulatory Commission, Office of Inspection 6 Enforcement, regional office.
Bases The purpose of this program is to permit accomplishment of the specification objective.
Surveillance frequency is based on previous surveillance data at Arkansas Nuclear One indicating that twice per week sampling provides essentially the same numbers as 3 or 5 times per week sampling.
Subsampling is done to reduce the sampling effort and replicates are taken to r. bce subsampling error.
Length and weight determinations are made to determine impingement selectivity. The numbers methodology for length and weight determinations is a fairly standard practice in aquatic biology. The limits on fish grinding operations are based on state water quality regulations of a minimum dissolved oxygen level of 5.0 mg/l at 5 ft. or 1/2 the total depth, whichever is less, except as a result of natural causes.
(3) -Entrainment of Plankton, Eggs and Larval Forms Objective:
The purpose of the entrainment survey is to determine the thermal and mechanical effects of the cooling water system on the various kinds and quantities of larvae, eggs, and plankton taken into the plant water system.
Specificati_on Biological samples (organisms) of bottom samples and water samples were ".aken at 6-month intervals prior to plant operation and shalll be taken at quarterly intervals after operation at the intake and discharge locations.
Pelagic larval fishes shall be sampled by trawling with a fish larval net also in the intake and dis-charge areas.
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4-13 (b) Terrestrial Not applicable.
(c) Aerial Not applicabic.
4.2 Radiological Environmental Monitoring Obj ective:
To provide information on the radiological effects of station operation on the environment.
Specification:
An environmental radiological monitoring program shall be carried out as defined in Tables 4-1 and 4-2 at locations defined in Figure 4-1 and Table 4-2.
4.2.1 Air Sampling Continuous air sampling shall be performed at four locations onsite, two off-site within a ten-mile radius of the Plant, and one reference Locations have been selected near site boundaries and in i
location.
existing populated areas for evaluation of possible exposure to airborne particulate and halide radioactivity resulting from station The collection devices for iodine shall contain potassium operation.
iodide impregnated charcoal or equivalent, and shall be constructed and operated so as to retain quantitatively the iodine in the air Appropriate analyses of particulate passing through the device. filters and halide collection devices shall be p samples in accordance with accepted techniques and nuclides of interest.
4.2.2 Direct Radiation Ambient levels of direct external radiation shall be measured at the same locations as air particulate.
Measurements shall be made by exposing thermoluminescent dosimeters for periods of three months 4
and six months.
4 4.2.3 Precipitation Sampling Precipitation sampling shall be carried out at four locations; two onsite, c le within a ten-mile radius, and one reference location Analyses shall be approximately twenty miles southwest of the plant.
i performed as given in Tab.e 4-1.
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'2-1 2.0 LIMITING CONDITIONS FOR OPERATION 2.1 Thermal 2.1.1 Maximum AT Across Condenser Obj ective To limit thermal stress to the aquatic ecosystem by limiting the maximum AT across the condenser during operation.
Specification:
a.
The maximum differential temperature across the condenser shall not exceed 15F during normal operation with all four circulating water pumps in operation.
b.
If one or two circulating water pumps are out of service at any given time the maximum condenser AT shall not exceed 30F; and Specification 2.1.2 of this Appendix shall be met.
Monitoring Requirement
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The temperature differential across the condenser shall be monitored every hour utilizing the computer output of the condenser inlet and l
the circulating water discharge fiume temperature measurements.
The range of these measurements shall be 0-150F and their accuracy shall be 0.5%.
If the plant computer is inoperable, the condenser AT shall be moni-l tored at least once each shift when the plant is operating at steady state power IcVels. The condenser AT shall be measured within two (2) hours after a change in power level has been stabilized and at least once each shift thereafter.
The condenser AT shall be deter-mined using measurements at the condenser inlet and in the discharge canal.
Bases Maximum AT's of 15F with 4 circulating water pumps operating
(%1700 cfs flow) and 30F with 2 circulating water pumps operating will insure that the limits of the applicable water quality criteria will not be exceeded.
The difference in temperature readings of the RTD's at the inlet of.the condensers and at the circulating water discharge fiume provides the AT across the condensers.
Specification 2.1.1.b allows maintenance to be performed on circulating water pumps when the Dardanelle Reservoir ambient temperature is such that Specification 2.1.2 will not be exceeded. Ilydraulic model studies have shown that a 30F AT at 850 cfs circulating waterflow will not result in adverse changes in the Dardanelle Reservoir isotherus when A
2-2 compared to the isotherms resulting from a 15F AT at 1700 cfs except on the surface of the discharge erhapnent.
- .1.2 Maximum Discharge Temperature Objective To limit thermal stress to the aquatic ecosystem by limiting the plant's maximum discharge water temperature.
Specification The condenser discharge water temperature shall not exceed 105F If the water temperature for more than two consecutive hours.
exceeds 105F for two hours an investigation of the situation will be undertaken and corrective action shall be taken to main-One such tain the discharge water temperature at 105F or less.
corrective action would be a reduction in the plant power level This unless there is an emergency need for the lost power.
emergency nec ' would exist when a reduction in power would mean If monitoring (see below) indicates cutting off firm customers.
that the temperature at the mouth of the discharge embayment is <105F, the plant load will not be reduced.
Monitoring Requirements Condenser discharge water temperature shall be monitored every hour utilizing the average of the computer output of the circulating The RTD's have a 0-150 F range water discharge flume RTD readings.
and an accuracy of 0. 5'4.
l the condenser discharge temper-If the plant computer is inoperab'a, If the condenser ature shall be measured at least o.me each shift.
inlet temperature exceeds 85F with all four circulating water pumps l
runninh, the circulating water discharge ~ flume temperature shall be monitored every two (2) hours.
l If the circulating water discharge flume temperature exceeds 105F, plant personnel will be dispatched to the mouth of the discharge Moni-embayment to monitor the exit temperature from the embayment.
toring of the embayment will continue every two hours as long as the l
circulating water discharge flume temperature remains at 105F.
Bases The 105F maximum discharge water temperature limit is set to assure that the Dardanelle Reservoir temperature does not exceed i
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2-3 The 95F as established by the applicable _ water quality criteria.
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use of the circulating water discharge fiume RTD's prov circulating water discharge temperature prior to mixing with the Dardanelle Reservoir water.
No credit was taken in the analyses and mcdels of the circulating water system for heat exchange within the discharge embayment even though it is expected that the water temperature will be Thus, the average temperature should reduced in the embayment.
be <105F even when the temperature at the circulating water discharge fiume is greater.
2.1.3 Maximum B7U/hr Not applicable.
- 2.1.4_
Rate of Change of Discharge Temperature Objective To avoid thermal stress to the aquatic ecosystem due to sudden changes in water temperature.
Specification in the event of a planned shutdown during the period November 4
through April, the reactor power -level shall be reduced to 0% at such that the decrease in the circulating water discharge a rate:
flume temperature shall be <5F/hr in order to avoid any adverse thermal impact on the aqaatTc environment in the discharge et ay-As the reduction in power level is made, the number of ment.
operating circulating water pumps will be reduced so as to limit the rate of decrease. of the water temperature in the discharge b
embayment._
This limitation may be exceeded for brief periods as necessary to protect plant equipment and for certain safeguard operations These which cannot be limited or r gated by plant operation.
safeguard operations include automatic plant trips and compliance with safety-related technical specifications.
If after a few planned shutdowns at the specified rate, there f
are no detectable adverse effects on the discharge embayment environment, then future planned shutdowns may be conducted at slightly higher rates. The required monitoring shall bc L
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conducted until it is established that there is' no adverse environmental impact associated with plant shutdowns cenducted If there is adverse environmental impact at the higher rate.
- detected, then future planned shutdowns will be conducted at slightly slower rates until a shutdown rate where there is no detectable adverse environmental impact is determined.
Monitoring Requirement _
Circulating water discharge flume temperature will be monitored every hour during the power reduction utilizing the average of the computer output of the circulating water discharge fiume RTD readings. The RTD's.have a 0-150F range and an accuracy of i0.5%.
If the plant computer is inoperable, the circulating water dis-charge flume-temperature shall be monitored at least once per hour during the power reduction utilizing the condenser temperature recorder which has a 0-150F range and a 10.5% accuracy.
The aquatic environment of the discharge embayment will be watched during and immediately after planned shutdowns in order to detect any adverse environmental impacts on the embayrent, which might A record of the observations made, rate of temperature occur.
change, and appropriate data shall be maintained.
N Bases There has been no incidence of adverse environmental impact There is also associated with any operating APGL power plant.
a lack of data or evidence which would support a limiting rate of change of temperature for the specific species that might inhabit the ' discharge embayment.
In view of this, a conservative
' rate of ch'ange, 15F/hr, is specified.
It is also conservative because the actual rate of change of the discharge embayment will be slower than the rate of change of the circulatjng water system.-
A reduction in circulating water flow will further decrease the
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rate of change.cl temperature in the discharge emoayment.
2.1.5 ikat Treatment of Circulating Water System Not Applicable.
2.1.6.
Deicing Operations Not Applicable.
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- ~m (TEfAPOiiARY FORld)
' CONTROL NO:
4288 "E0 FILE:
FROM: Arkansas Power & Light DATE OF DOC DATE REC'D, LTR TWX RPT OTHER Co.
Little Rock, Ark: 72203 g,1T,75 g,yg,75 g
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' TO:
~ Mr. A. ciambuseo.
1 signed 39 SENT LOCAL PDR H
CLASS UNCLASS PROP. INFO INPUT NO CYS REC".>
DOCKET NO:
N 46 50-313
. DESCRIPTION:
Ltr no'tarized 4-17-75 furnishint ENCLOSL RES:
Changes that are proposed to addl info re Enviro Tech specs for Ark. One Unii 1
make the Ark. Nuclear One-Unit l ' Tech.
& trans the following:
Specs.....
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PLANT NAME: Aarkansan Unit 1 FOR ACTION /INFORMATION DHL MIS
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SCHWENCER (L) YZIET.lANN (L)
REG AN (E)
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DICKER (E)
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W/ Copics W/ Copics W/ Copics W/ Copies PAllH (L)
VASSALLO (L)
KNIGHYON (E)
SPELS
'.'.,' Copic s s// Copies W/ Copies W/ Copics KNIEL (L)
PURPLE (L)
OOUf:G3LOOD (E)
W/ Copies W/ Copies W// Copics W/ Copies INTERNAL DISTRICUTION MG F H O TECH REVIEW 00ENTON LIC ASST A/T IND.
~' chb 55 DER GRIMES R. DIGGS (L)
BRAl'1 MAN ano Gtud S
MGC. ROOM P 50GA M Af'CA R Y AMMILL H. GE APIN (L)
SALTZMAN 4COSSICK/ STAFF KNIGHT ASTNE R E. GOULBOURNE (L)
MELTZ.
CASE PAWLICKl ALLARD P. KREUTZER (E)
GIAMBUSSO SHAO SPANGLER J. LEE (L)
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PLANS BOYD STELLO M. MAIGRET (L)
- MCDONALD MOORE (L)
HOUSTON JNVIRO S. REED (E)
CHAPMAN DEYOUNG (L)
NOVAK EMU L LE FT M. SERVICE (L)
DUBE (Ltr)
SKO'JHOLT (L)
ROSS DICKER S. SHEPPARD (L)
E. COUPE GOLLER (L) (Ltr)
IPT OLITO KNIGHTON M. SLATER (E)
PETERSON P. CO L LINS VfEDESCOh)
YOUNGGLOOD H. SMITH (L)
IIARTFIELD (2)
DENISE LONG
,pEGAN S
KLECKER LE G_OP_R LAINAS FPROJECT L,DR 4.TEETS(L)
. WILLI AMS (E)
EISENilUT dlLE & REGION (2)
JENAROYA 8/jdA64-//P
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'.WIGGIN TON T.R. WILSON f 0LLMER liar LESS Fll. INGRAM (L)
STEELE
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EXTERNAL DISTRIBUTION yd C tOI l M - LOCAL POR. Russellville, Ark. -
4-TIC (ADERNATilY) (1)(2)(10) - NATIONAL LABS 1 - PDR SAN!LA/NY FI - NSIC (BUCli ANAN) 1 - W. PENNI.^.GTON. Rm E-201 GT 1 - DROOKHAVEN N AT LAB l 1 - ASLB 1 - CONSU LTANTS 1 - G. U L R IKSON, 0.7::L
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1 - J. D. R UNK LE'S, fim E 23 5 Rm B.127 GT l
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