ML18283A848

Encloses Proposed Temporary Changes to Environmental Technical Specifications. Includes Amendment to Operating License Change to Appendix B Technical Specifications Thermal Discharge Limits

ML18283A848
Person / Time
Site:	Browns Ferry
Issue date:	05/23/1977
From:	Gilleland J Tennessee Valley Authority
To:	Stello V Office of Nuclear Reactor Regulation
References
Download: ML18283A848 (14)

Text

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~C zq WP Q.ETTEA KOAIG INAL Ocopv DESCRIPTION 4OTO BIZE D UNCLASSIFIED Mr. Victor'tello, Jr, FROM:

Tennessee Valley Authority Chattanooga, Tennessee Je ED Gilleland INPUT FOAM.

PROP ENCLOSURE F It. E NUMa E A

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=N~JESSEK V<L~ -'L 'CRl CHATTANOOGA. Tc.Ni'4KSSEK S740i May 23, 1977 TVA BFNP TS 83 HE 26 lg77 r

Director of Nuclear Reactor Regulation Attention:

Mr. Victor Stello, Jr., Director Division of Operating Reactors U.S. Nuclear Regulatory Commission Washington, DC 20555 K(KAYOINGIIllIlKTFIL[NIP Tennessee Valley Authority 50-260 50-296 In accordance with the provisions of 10 CFR Part 50.90, we are enclosing proposed temporary changes to the environmental technical specifications for the Browns Ferry Nuclear Plant unit Nos.

1 and 2

(Appendix B to Facility Operating Licenses DPR-33 and DPR-52),

and the Browns Ferry Nuclear Plant unit No.

3 (Appendix B to Facility Operating License DPR-68).

Enclosure 1 is a proposed change to Section 2.1 THERMAL DISCHARGE LLMTS that would approve a temporary increase in the discharge water temperature limits.

Enclosure 2

provides justification for the requested temporary change.

This matter has been discussed with members of your staff.

Approval is requested by June 6, 1977, so the testing may proceed on schedule.

Very truly yo~s,

. E. Gilleland Assistant Manager of Power Subscribed an+swor me this~~~%ay of

~ totary Publ'c o before 977 My Commission Expires D

Enclosures cc:

See page 2

t 77i530i01 An Eauot Opportunity Employer

Mr. Uictor Stello, Jr.

cc (Enclosures)

Mr. Tom Wombach Operating Reactors Branch No. l Division of Operating Reactors U.S. Nuclear Regulatory Commission Washington, DC 20555

Enclosure 2.0

.L.r~+TxLlG coiaxTro:Ls FO.L op"-LLATro;L 2.3.

Ti/FPiRL DrSCF~GE LXVXTS Ehnitorin Peouirement 0

~Ap CJ Ol0 Sh0 Oh)ective The purpose of this specification is to limit the thermal stress on, aquatic life in Maeler Res rvoir by operating Srowns Ferry Huc3.ear Plant so as to meet the applicable eater quality temp rnture tancLaxd,s of'he State of'labama.

S cification The plant-induced. reservoir vater tempera-ture at the 5-foot depth at the downstream contro3. point shall not exceed. the water temperature measured, at the 5-foot depth of the upstream control monitor 'by more than th applicnb3.e ma'cimum temperature rise {currently 5 F~)nor shall th resex-voir vater temperature measured nt the 5-foot depth nt the downstream contz03. point exceed. the applicable

~~ imum ~ter tem-perature (curxently 86~F~) due to the

@discharge of the condenser cooli g >>ter.

Xf this limiting condition io exceeQed, the plant operator shal3. ini~iate contr01 measures..

The control measu-es oh&.3. be (1) to reduce the ~ote heat dischnrgecL to th reservoir anQ/ox (2) to recLu'st modifica-tions in the xeleases from TVA'o Guntersvi3.1e nnd/or Hheeler Dnms to, increase the streamflow 'by the Brogans Ferry plant.

~During a special diffuser performance study during the summer of 1977. {anti-cipated completion in June, l977), a maximum temperature rise of 10 F and a maximum water temperature of 90 F, both recorded at the 5-foot depth, will be permitted.

Buboes The xmter temperature data collecteQ. by

'he therJml monitoring n two"r; io te3e-matered to the Browns Ferry meteoro-3.ogical. station.

The meteoro3.ogical station mill xeceive the data. and auto-matically record. the readings every 60 mLnutes.

All, temperature data are recoxded. on paper tape and maintained for xeco d:Keeping purposes.

The 5-foot cLepth temLleratu e data which are used to prevent e:cceeding the limiting condition villbe transmitted to the contro1 room ancL %11 'be visually cLisplayed. for moni-toring purposes.

The accuracy of the system nnd. the sensitivity of'he thexmistor sensors are designed, to be

+ 0.3~F and. 0.01F, xespectively-ee thermal xxlnitors spacecL across the reservoir in the vicinity of xivex'ile 292.5 shall serve no th downstream con-tro3..

R~ro monitors 3.0cated a'bove the

~ plant, on locateQ, at about river mile 297.6, ancL a second.

3.ocated. in thi" vicinityvillprovide the upstream eater tempexeture data.

The system is cLesignec.

so that th downstream control monitors serve as b coup f'r on anothex and.

similnl3y for the two upstream monitors.

Th-locations of existing tempexature monitors are disp3.nyecL in Figure 2-3.-1.

Xn the event th system descxibed is out of service, an alternate method vill'b employed three times a day (once each sM.W~) to measure the river temperature at the 5-foot depth in the vicinity of the upstream and. downstream contro" monitors anQ. thus determine the tem-pexnture rise and. the >mx9xn~ xiver vater temperature below the p3.ant Unpen such a method. mnQ.d resu3.t in nn imminent and substantia3.

endangexmnt to the safety of'ex sonnet., thi" paragraph shall not nppQ-.

TVA, as n Federal agency, io recLuired 'by Sction 3l3 of the Fed r 1 Hater Pollution Control Act Amendmento of 1972 (P.L.92-500) nnd by Executive OrcLer 11507, "Preven-tion Contro3. nnd Abntenent of'ir and Hater Pollution ot Federal Fnci3.itieo," to m<<t applicable Federal, otnte, and, local water cLuality standards.

On Zu3y 17, 3.9(

~ ~

~

2 the State of Alabama, adopted and. on Septc. ber 19, 1972, th Znvirormntnl Protection Agency

Enclosure 2

tification fo P

d ETS Ch The following is a brief discussion of'he short-term field study that TVA proposes to conduct in order to verify plant discharge diffuser mixing.

TVA proposes to conduct a series of instream temperature and flow measurements during the summer of 1977 in Wheeler Reservoir near the Browns Ferry Nuclear Plant, using specially equipped boats.

Although the period of testing may be several weeks long, the actual test time (total), is not expected to exceed approximately one week.

The tests will evaluate the actual thermal mixing characteristics of the diffusers under preplanned conditions of river flow and plant operation consistent with system power generation requirements.

The results of these tests wi3.1 be used to:

a.

Assist the plant personriel in routinely operating the condenser cooling system of the plant in compliance with the thermal water quality standards and b.

Further refine theoretical methods and. mode3.s used in the design of future underwater diffuser systems being considered at new plants.

During initial phases of the tests measurements will be made of the diffuser performance under low and reverse flows in the river with the plant's condenser cooling system operating on cooling towers in the helper mode.

During the final phase measurements will be made under the full range of river flows and while the plant is operated with the condenser cooling system in open mode (no cooling towers in service).

During the study period records of temperature data from the boat 'surveys and from the system of installed reservoir monitors will be maintained.

Model verification is required by Section 4.1.1(b)

Thermal Plume Mapping of the ETS'S, which states that TVA must "verify the accuracy of thermal plume models used in predicting environmental effects from the thermal releases from the Browns Ferry Plant."

This proposed study should provide valuable information in evaluating the accuracy of thermal plume model predictions at Browns Ferry Nuclear Plant.

Due to the nature of this study, the present thermal discharge limits specified in Section 2.1 of'he ETS's may be exceeded. for short periods of time.

Computer model predictions of mixed-temperature rise for the test program indicate that the maximum plant-induced heating will be 5.3.oF during one phase of the tests, but during the ma)ority of the test period, the plant-induced heating is expected. to be less than 3 F.

Although the actual plant-induced heating may be slightly different from the predicted values, TVA believes that a maximum plant-induced temperature rise 'of 10 F or a maximum plant-induced water temperature of 90oF in Vheeler Reservoir for such a short duration would only result in a few fish leaving the thermally-influenced area.

Upon completion of the tests, the fish would be expected to return to the area.

Such movements would have no 'significant impact on the Wheeler Reservoir fisheries resources.

All other specifications and requirements related to thermal discharges from the Browns Ferry Nuclear Plant would remain in effect.

1 ENNESSEE VALLEYAUTHORITY CHATTANOOGA) TENNESSEE 374OI MAY 23 197?

TVA BFttP TS 83 Director of Nuclear Reactor Regulation Attention:

Mr. Victor Stello, Jr., Director Division of Operating Reactors U.S. Nuclear Regulatory Commission Washington, DC 20555

Dear Mr. Stello:

In the. Matter of the Tennessee Valley Authority

)

Docket Nos. 50-259

)

50-260 50-296 In accordance with the provisions of 10 CFR Part 50.90, we are enclosing proposed temporary changes to the environmental technical specifications for the Browns Perry Nuclear Plant unit d'Ios.

1 and 2

(Appendix B to Pacility Operating Licenses DPR-33 and DPR-52),

and the Browns Perry Nuclear Plant unit No.

3 (Appendix B-to Pacility Operating License DPR-68).

Enclosure 1 is a proposed change to Section 2.1 THERKQ DISCHARGE L3ZKTS that would approve a temporary increase in the discharge water temperature limits.

Enclosure 2

provides Justification for the requested temporary change.

This matter has been discussed with members of your staff.

Approval is requested by June 6, 1977, so the testing may proceed on schedule.

Very truly yours, A.eeg g J.

E. Gilleland Assistant

~tfanager of Power Subscribed aqd swo to before me this+3t~day od'977 6"n, Notary Public My Commission Expires

> 7 Enclosures cc:

See page 2

An Equal Oooortunity En>cloyer

Nr. Victor Sto11o, Jr.

MAY 23 197$

cc (Enclosures):

Hx Tom Mombach Operating Reactors Branch No. 1 Di~ion of Operating Reactors U.S. Huclear Regulatory Commission Washington, DC 20555

f Enclosure 1

2.0 LIf!XVItiGCO'iDITIO:lS FOR OPZcbi IOH 2.1 Tiigc,!:AL DISCEBGE LD!ITS Ehnitorin Peouirerant OM Bc 1'v&

The pux'pose of this spacificatloxL is to 1init the therma3. stress on aquatic 3.ife in lQ.aeler Reservoir 'by operating Brovns Ferry Nuclear P1ant so as to meet the appl.ieab3 e vater gus.ity temperature tandards of the State of Alabama.

S acification The plant-induced, reservoir water tampa a-ture at the 5-foot depth e:h. the dovnstream contro3. point sha11 not exceed, the water temperature measured at tha 5-foot depth of the upstream control monitor 'by more than tha applicable maximum temperature rise (currently 5OF-)nor shall the reser-voir watcx temp xature measured at the 5-foot depth at the dovnstrem cont o3. point exceed, the app1.ieebla maximum water tem-arature (currently 86OF") dua to the c: discharge of the condenser coo3.ing water.

Xf this 1imiting condition is exceeded, the pl nt operator sha31 initiate control nea uxes..

The control measures shall be (3) to reduce the waste heat discharged to tha reservoir and,/ox (2) to xacLuast modifica-tions in tha xeleasas frcmz TVA's Guntersvi3.le and/or wheeler Hams to increase the streamf3ov 'by the Erovns Ferry plant.

.~During a special diffuser performance study during the summer of 1977 (anti-cipated completion in June, 1977),

a maximum temperature rise of 10 F and a maximum water temperature of 90oF, both recorded at the 5-foot depth, villbe permitted.

Bases The water temperature data col.3.ected by tha thawing. monitoring n two's tele-metered to the Erovns Ferxy nmtcoro-1ogical station.

The mataoro3.ogieal station vQ.l xeceive tha data and. auto-matically record. th readings every 60 minutes.

A13. temperature data az e recorded. on payer t pa and maintained for record:3ceeping purposes The 5-foot depth temperature data which are used, to prevent'exceeding the 3.imiting condition Vill.ba transmitted to the contro3. room and vi13. be vism11y displayeQ. f'r roni-toring purpos s.

The accuracy of the system and the sansitMty of the th rmisto sensors are designed to b-

+ 0.3oF and. 0.01, F, respectively Three thexma3. ~nito s spaced acxoss the reservoir in the vicinityof'iver xi3.e 292.5 shaU. serve as the downstream con-txo3..

Wn xtonitors 1ocatad above the

.ply, on locateQ, at about riv r mila 297-6, and a second. 3.ocatad in his vicinitywillprovide the upstream water temperature data.

The sys am is designee.

so that the downstream con rol xmitors serve as backup for on another and.

similar3y fox the tvo upstream monitors.

Tha locations of existing tempaxature monitors are clisp1ayed in Fiona 2 3.-1*

3:n th event tha system described, is out of service~ an a3.ternate method willb etxp3.oyez'. three times

a. Qay (once each sM.f~) to measure tha rivex temperature at the 5-foot d,epth in the vicinity'f tha upstream and. downstream contro3 monitors and, thus determine the tem-perature rise and the maxf;arne vier water tezparature below the p1ant Uhan such a mathoQ. would. resu3.t in an imminent and. substantial endangerm nt to the safety of parsonna3., thi paragraph sha11 not appQ-.

KVA, as a Federal agency, is recjuired 'by Swtion 33.3 of the Fade.a3. Mater Pollution Contro3. Act Amendments of 3.972 (P.I.92-500) and by Executi've psQar 13.507 "Preven-tion, Contro3. and Abatemant of Air an@ Mater PoU.ution at Federal Facilities, to meet applica'ble Fedexal, state, and. local, water quality standards.

On July 3.7, 1972, the State of Alabama adopted and. on Septa=b r 19, 1972, the Znviroz~ntal Protection Agency

Enclosure 2

ificat f

P d

TS The following is a brief discussion of the short-term field study that TVA proposes to conduct in order to verify plant discharge diffuser mixing.

TVA proposes to conduct a series of instream temperature and flow measurements during the summer of 1977 in Wheeler Reservoir near the Browns Ferry Nuclear Plant, using specially equipped boats.

Although the period. of testing may be several weeks long, the actua1 test time (total) is not expected to exceed approximately one week.

The tests will evaluate the actua1 thermal mixing characteristics of the diffusers under preplanned conditions of river flow and plant operation consistent with system power generation requirements.

The results of these tests will be used to:

a.

Assist the plant personnel in routinely operating the condenser cooling system of the plant in compliance with the therma1 water quality standards and

, b.

Further refine theoretical methods and. models used in the design of future underwater diffuser systems being reconsidered at new plants.

During initial phases of the tests measurements will be made of the diffuser performance under low and reverse flows in the river with the plant's condenser cooling system operating on cooling towers in the helper mode.

During the final phase measurements will be made under the full range of river flows and. while the plant is operated with the condenser cooling system in open mode (no cooling towers in service).

During the s'tudy period records of temperature data from the boat 'surveys and from the system of installed reservoir monitors.

will 'be maintained.

Model verification is required by Section 4.1.1(b) Thermal Plume Mapping of the ETS'S, which states that TVA must "verify the accuracy of thermal plume models used. in predicting environmental effects from the thermal releases from the Browns Ferry Plant."

This proposed study shou1d provide valuable information in evaluating the accuracy of thermal plume model predictions at Browns Ferry Nuclear Plant.

Due to the nature of this study, the present thermal discharge limits

'specified in Section 2.1 of the ETS's may 'be exceeded, for short periods of time.

Computer model predictions of mixed-temperature rise for the test program indicate that the maximum plant-induced heating will be 5.1oF during one phase of the tests, but during the ma)ority of the test period, the plant-induced. heating is expected. to 'be less than 3 F.

Although the actual plant-induced heating may be'slightly different from the predicted values, TVA believes that a maximum plant-induced temperature rise of 10 F or a maximum plant-induced water temperature of 90 F in Wheeler Reservoir for such a short duration would only result in a few fish leaving the thermally-influenced area.

Upon completion of the tests, the fish would be expected to return to the area.

Such movements would have no significant impact on the Wheeler Reservoir fisheries resources.

All other specifications and requirements related to thermal discharges from the Browns Ferry Nuclear Plant would remain in effect..

TENNESSEE VALLEYAUTHORITY CHATTANOOGA. TENNESSEE 37401 TVA BFHP TS 83 MAY 33 1977 Director of Nuclear Reactor Regulation Attention:

kh. Victor Stello, Jr., Director Division of Operating Reactors U.S. Nuclear Regulatory Cotmaission Uashington, DC 20555

Dear Ih. Stello:

In the ifatter of the Tennessee Valley Authority

)

Docket Nos.

50>>259

)

50-260 50-296 In accordance with the provisions of 10 CFR Part 50.90, we are enclosing proposed temporary changes to tha environmental technical specifications for the Browns Ferry Nuclear Plant unit ~los.

1 and 2

(Appendix B to Facility Operating Licenses DPR-33 and DPR-52),

and tha Browns Ferry Nuclear Plant unit No.

3 (Appendix B to Facility Operating License DPR>>68).

Enclosure 1 is a proposed change to Section 2.1 THERMAL DISCHARGE LIHI S that would approve a temporary increase in the discharge water temperature limits.

Enclosure 2

provides Justification for the requested tempozary change.

This natter has been discussed with members of your staff.

Approval is requested by Junc 6, 1977, so the testing may proceed on schedule.

Very truly yours, J.

E. Gilleland Assistant."fanager of Power Subscribed an/ sworn to before me t1da~3'%!ay of 977

~8 tery Public Hy Commission Expires d

Enclosures cc:

See page 2

An Equal Opportvnity Fmployer

Mr. Victor Stello, Jr.

MAY 2,8 18'IIl:

cc (Enclosures):

kh. Tom Mombach Operating Reactors Branch No.

1 Mv1sion of Operating Reactors U.S. Nuclear Regulatory Commission Washington, QC 20555

Enclosure 1

2.0 LltGTIt'.G COi'i0ITIOsiS FOR OPZBAVIOig 2.1 THEPsÃL DISCKDGE LIi.'ITS Ehnito in Peouiremant 0

~pl Q

~ 0) 0 04 Ob]ective The purpose of'his specification is to 3.imit the thermal stress on. aquatic life in LQ.eeler Reservoir 'by operating Broads Ferry Rhtclear Plant so as to meet tha applicable water quality temparatuxe standard,s of the State of Alabama.

S cification The. plant-induced xeservoir eater tempaa-ture at the 5-foot depth at the downstream contro3. point shall not exceed the eater*

tempexature measured at, the 5-foot depth of the upstream control monitor by nore than th applicable maximum temperature rise (currently 5~P~)nor shall-tha resar-voir vater temp rature maasureQ. ct the 5-foot depth at the dovnstra~~

control point exceed the applicaMe maximum ~ter tem-p rzture (currently 86 P') dua to tha

.%discharge of the condenser cooling wwter.

If this limiting condition is exce cled.,

the plant operator shaU. initiate contro3.

mea ures.

The contro3. measures sha3.3.'he (1) to xeduce the waste heat discharged to tha reservoir and/ox (2) to xequ st nodifica-tions in the releases from TVA's Guntersville and/or %healer Dans to, increase the stxcamflov 'by the Broads Ferry plant.

+During a special diffuser performance study during the summer of 1977. (anti-cipated. completion in June, 1977),

a maximum temperature rise of 10 F and a maximum vater temperature of 90 F, both recorded at the 5-foot depth, will be permitted.

Esses The eater temperature data co3.3ected by the thenml monitoring network; is tele-metered to the novns Ferxy mateox'o-logica1 station.

The meteoroid.ogical station v'i3.1 xeceive the data and. auto-matically recoxd th readings every 60 minutes.

All, temperature Qata are xecorded. on paper tape and. maintained.

for xecoxd:1ceeping purposes Tha 5-foot depth temparatu e data vhich are used to prevent 'exceeding the 3.imiting condition Mllbe transmitted to the contro1 room and. &11 be visually displayed for moni-toring purposes.

The accuracy of the system and. th sensitivity of the thermistor sensoxs are designed, to b-

+ 0.3~F and. 0.01 P, respectively.

'Three thermal'. ~nito s spaced, across the reservoir in the vicinity of river wale 292.5 shall serve as the downstream con-trol.

Win monitors 3.ocatad above the

.plant, ona located. at about xiver mile 297.6, and. a seconQ. locat ct. in thi" vicinityvillprovide the upstream mter temperature data.

The system is designee.

so that the do'mstream control nonitors serve as backup for on anothex and similar3y fox the two upstream monitors.

Th 3.ocations of existing temp x'.ture nonitors are displayed in Figure 2-1-1-'n the avant th system described. is out of sexvica, an a3:ternate method miH b-employad three times

a. day (once each sMft) to measure the river temperature at the 5-foot depth in the vicinity'f tha upstream and. downstream control monitors and. thus determine the tem-p"xature rise and, th~ ma:duum river eater temperature

'be.ov the plant-Uhan such a method vau1d resu3.t in an imainant and. substantial endangexmant to the safety of parsonna3., thi" par graph "hall not appQ-.

e pe, as a Federal agency, is required 'by Swtion 33.3 of the Federz3. ]Tater pollution Control Act Amendments of 1972 (P.I.92-500) and, by Executive Order 11507, "Preven-tion, Control and Aba;temant of Air and hater PoU.ution at Federal Facilities," to meet applicab3.e Federal, state, anQ. 3.ocal mter quality standards.

On July 17, 19(2> the State of Alabama adopted and. on September 19, 3.972, th= Znviroxmntal Protection Agency

Enclosure 2

ification for Pro osed ETS Cha The following is a brief discussion of'he short-term field study that TVA proposes to conduct in order to verify plant discharge diffuser mixing.

TVA proposes to conduct a series of instream temperature and flow measurements during the summer of 1977 in Wheeler Reservoir near the Browns Ferry Nuclear Plant, using specially equipped boats.

Although the period of testing may be several weeks long, the actual test time (total) is not expected to exceed. approximately one week.

The tests will evaluate the actual thermal mixing characteristics of the diffusers under preplanned conditions of river flow and plant operation consistent with system power generation requirements.

The results of these tests will be used to:

a.

Assist the plant personnel in routinely operating the condenser cooling system of the plant in compliance with the thermal water quality standards and b.

Further refine theoretica1 methods and models used in the design of future underwater diffuser systems being considered at new plants.

During initial phases of the tests measurements will be made of the diffuser performance under low and. reverse flows in the river with the plant's condenser cooling system operating on cooling towers in the helper mode.

During the final phase measurements will be made under the full range of river flows and while the plant is operated.

"with the condenser cooling system in open mode (no cooling towers in service).

During the study period records of temperature data from the boat 'surveys and from the system of installed reservoir monitors will be maintained.

Model verification is required by Section 4.1.1(b)

Thermal Plume Mapping of the ETS'S, which states that TVA must "verify the accuracy of thermal plume models used in predicting environmental effects from

- the thermal releases from the Browns Ferry Plant."

This proposed.

study should provide valuable information in evaluating the accuracy of thermal plume model predictions at Browns Ferry Nuclear Plant.

Due to the nature of this study, the present thermal discharge limits specified in Section 2.1 of the ETS's may be exceeded for short periods of time.

Computer model predictions of mixed-temperature rise for the test program indicate that the maximum plant-induced. heating will be 5.1oF during one phase of the tests, but during the ma)ority of the

.test period, the plant-induced heating is expected to be less than 3 F.

Although the actual plant-induced heating may 'be slightly different from the predicted values, TVA believes that a maximum plant-induced temperature rise of 10 F or a maximum plant-induced water temperature of 90 F in Wheeler Reservoir for such a short duration would only result in a few fish leaving the therma1ly-influenced area.

Upon completion of the tests, the fish would be expected to return to the area.

Such movements would, have no significant impact on the 3/heeler Reservoir fisheries resources.

All other specifications and requirements'related to thermal discharges from the Browns Ferry Nuclear Plant would remain in effect.

0

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