ML18139B890

Provides Info Resolving Remaining Outstanding Issues in Proposed Tech Specs for Auxiliary Bldg & Control Room Ventilation Sys,Per NRC 820524 Ltr & 820604 Meeting.Control Room Dose Calculations Encl

ML18139B890
Person / Time
Site:	Surry
Issue date:	06/07/1982
From:	Leasburg R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Harold Denton, Varga S Office of Nuclear Reactor Regulation
References
335, NUDOCS 8206110140
Download: ML18139B890 (47)

Text

,'~

VIRGINIA ELECTRlC AND POWER COMPANY RICHMOND,. VIRGINIA. 23261 R, H. LEASBURG VxcE PJ<ESIDENT June 7, 1982 NUCLEAR OPERATIONS Mr. Harold R. Denton, Director Serial No. 335 Office of Nuclear Reactor Regulation NO/PSEC/EVF/jmj/SP3 Attn: Mr. Steven A. Varga, Chief Docket Nos. 50-280 Operating Reactors Branch No. 1 50-281 Division of Licensing License Nos. DPR-32 U.S. Nuclear Regulatory Commission DPR-37 Washington, D.C. 20555 Gentlemen:

AUXILIARY VENTILATION SYSTEM MODIFICATION PROPOSED TECHNICAL SPECIFICATIONS SURRY POWER STATION - UNITS 1 AND 2 In response to your letter of May 24, 1982 and in accordance with discussions and agreements in a June 4, 1982 meeting with your staff, we are providing the following information which we feel resolves the remaining outstanding issues in our proposed Technical Specifications for the Auxiliary Building and Control Room Ventilation Systems at Surry Power Station.

1. Auxiliary Building Ventilation System

a. The acceptance value for the flow rate testing shall be 36,000 CFM +/-10 percent.

b. The flow rate testing of each filter system shall be performed initially, after any structural maintenance on the HEPA filter or charcoal adsorb er housings, at least once per refueling cycle, and after each complete or partial replacement of the HEPA filters or charcoal adsorbers.

c. The method for determining the air flow rate shall be in accordance with Section 9 of the ACGIH Industrial Ventilation document and Section 8 of ANSI N510-1975.

d. The flow rate utilized during in-place cold DOP testing and in-place halogenated hydrocarbon leakage testing shall be 36,000 CFM +/-10 percent. This flow rate should be verified utilizing the flow elements located in each Category I filter train fan discharge. The as-installed accuracy of these flow elements is still under evaluation. The results of our efforts will be forwarded for your review once they are available. The calibration of the flow measurement system will fall under established station periodic calibration procedures.

,. e e

• VIRGINIA ELECTRIC AND POWER CciMPANY TO

2. Control Room Air Filtration System

a. The acceptance range of flows utilized during flow rate testing shall be 750 to llOO CFM. We have enclosed (Enclosure I) copies of control room dose calculations that indicate the control room accident condition doses, when considering the above range of flows, to be within the limits of GDC-19.

b. The flow rate utilized during in-place cold DOP testing and in-place halogenated hydrocarbon testing shall be the value determined during the system flow testing provided this value is within the acceptance range.

3. Laboratory Acceptance Testing of Used Charcoal Adsorber

a. For the auxiliary building ventilation system, the laboratory analysis of in-place charcoal samples shall show at least 96 percent methyl iodine removal at 0.125 second residence time, 1.75 +/- 0.25 mg/m 3 inlet methyl iodine concentration, relative humidity equal to 80 +/- 3 percent, and an air temperature equal to 30 +/- 1°C. The method of testing shall be in accordance with ASTM D3803.

Calculations providing justification for our position of utilizing 80 percent relative humidity in the laboratory testing of used charcoal will be transmitted once they have been released for distribution by our architect-engineer.

b. For the control room air filtration system, the laboratory analysis of in-place charcoal samples shall show at least 96 percent methyl iodine removal at 0.125 second residence time, 1.75 +/- 0.25 mg/m 3 inlet methyl iodine concentration, relative humidity equal to 95 +/- 3 percent, and an air temperature equal to 30 +/- 1°C. The method of testing shall be in accordance with ASTM D3803.

Our justification for utilizing 96 percent iodine removal efficiency is based on the enclosed control room accident dose calculations (Enclosure I). In those calculations, it was assumed the removal efficiency of the control room air filtration system charcoal adsorbers was 90 percent. We feel testing the used charcoal at 96 percent with dose calculations based on 90 percent represents a sufficient factor of safety, It should be noted that the 95 percent iodine removal efficiency noted in item 2.e. of our letter of January 19, 1981 (Serial No. 036) concerning control room habitability was based on nominal FSAR values and was not the value utilized during control room dose calculations. As previously stated, the value utilized during dose calculations was 90 percent.

e e VIRGINIA ELECTRIC AND POWER CciMPANY TO We feel this resolves the remaining open items concerning the proposed Technical Specifications. It must be realized any and all proposed changes to station Technical Specification must be reviewed and approved by the Station Nuclear Safety and Operation Committee and an independent review group prior to submission for NRC approval. We anticipate our formal Technical Specification submittal taking place within 30 days of this letter.

Should you require additional information, please contact us.

Very truly yours,

(\1 (~ -4,

( \JL 2l~-v\

R. H. Leasburg Enclosure cc: James P. O'Reilly, Regional Administrator U.S. Nuclear Regulatory Commission Region II Atlanta, GA 30303 Richard C. DeYoung, Director Office of Inspection and Enforcement Washington, D.C. 20555

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~ALCULATION TITLE PAGE .

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-NE e. WEBSTER ENGINEERING CORPOia!ON

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-ONE e. WEBSTER ENGINEERING CORPO-ION

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-ONE e. WEBSTER ENGINEERING CORPo-ioN

• CALCULATION SHEET -

CALCULATION IDENTIFICATION NUMBER J.O. OR W.O. NO. DIVISION e; GROUP CALCULATION NO. OPTIONAL TASK CODE PAGE S

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• -NE e. WEBSTER ENGINEERING CORPOR.ON CALCULATION SHEET ,

.5010.65 CALCULATION IDENTIFICATION NUMBER

.r"'\; J O. OR W.O. NO. DIVISION Ei GROUP CALCULATIJN NO. OPTIONAL TASK CODE PAGE_E_

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WEBSTER ENGINEERING CORPO~ION CALCULATION SHEET,

._ 5010 65 CALCULATION IDENTIFICATION NUMBER

---

. I .'.0.0RWO.NO. DIVISION Ei GROUP CALCULATION NO. !OPTIONAL TASK CODE PAGE_i,_

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43 44 45 46

- N E 8. WEBSTER ENGINEERING CORPO-ION

. CALCULATION SHEET -

CALCULATION IDENTIFICATION NUMBER

,J.O. OR W.O. NO. DIVISION 6 GROUP CALCULATION NO. OPTIONAL TASK CODE PAGE /(.)

/2 84-t.. /3 NT If f' uR (.e)~o.r/-o 2

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23 fL L n, . 1 (Ref.(4 >J.

24 re9+1~wr7 u.m~

• 25 26

.Sumar1 pf Re.sulf.s <~~feret'\C~{I)).

27 C.on fro I Room "J>oses (Kem) 28 29 30 T:fpe Confrol

• Roont. .Infol,e R~ (Cfm) 31 Z2QO 2000 I a>"o o 1600 ISQo 32 33 34 Thyro;d 2~.o Z3.~ 23,8 24.3 24-~

35 36 Whole bodt aa~ma..°* 0.14 o.14 o. 14 0.13 o. I 2.

37 38

'"Be.f°'- 1 1,4 /-4 /. 4 f.4 39 40 41

• -* /

42 43

• Whole bodt 0t1m111a dose in .flu. 's_ -A~ble lnchde.s tmlj .J.he eon-l-r,/!uA.l,d1f...

44 45

/rom 'he- CDnf,,-e roo111- a~

• 46

_ -* --*-- . - -* ., .*. ,-- *~* **--*- -*- --*- --*-*--* .... -~----*-*-** -*

• *ONE e. WEBSTER ENGINEERING CORPO-r!ON CALCULATION SHEET*.

& :,Q10 65 CALCULATION IDENTIFICATION NUMBER I ,I () OR w.o. NO. DIVISION Et GROUP CALCULATION NO. OPTIONAL TASK CODE PAGE ...i.J._

/.;;84C. ;3 NT Rf LJR{/3)-0.SI- O 2

3

]eferer1ce.s 5

~ q 6

UJ. S&. w. Cafe. 'tr 128'4 6. /3 Ul?{B)- 044-o, Co/7.fro/ R/)0117 l>ose.s 7

8 9

10 1

11

(.;)) s .&_ w. &mp,d;,.'i, ft0rl£t ' -:bRA~oN 4 , N l.J-/ IS' I Vers,'.rn O4 I LeveP O I) 12 13 14 cJ-. .I , E.ffed;11f cl~ - 12 /14 / ;q g,/ .

IS 16 17 (3) s & w c~>pV.Te( -progrcm\. II EFF Lfv1 Dt9 , ' N <.J -ISJ) v~r~,'m ()(),. L.e11elv~

18 19 0f. .I , E ffe c:t,*iA d~ - /o /11 /193 I .

() 20 21 22 23 24 2~

26 27 28 29 30 3 I 32 33 34 35 36 37 38 39 40 r*-. 41

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e A-I

SlJrr . Lo cA ])c$e "ReporT. frorr1. S &v.J

• 1o 1/Ef'CO, S/.3/77

1 TABLE 3-1 As.su.rmtions Used. i!l the LOCA Dose A::a!.zsis Povar Level 2,490 Mwt Opereting Title 3 :,r Fractfo::i o-:: Core Inventory Available for Leakage Iodines 25_percent

?iobla Ga.ses 100 percent Initial Iodine Conposition in Conta.1.c:nent Eler::e::::i.tal. 91 percent Organic 4 percent Po.rticulate 5 percent Conta.in.~?nt Lea.k Rate 0-390 sec _. o - I 070 se<:.

• 0.1 perce~t per day 390 sec-l hr -. / 070 :1.et: - .I hr 0.05 percent per day After 1 hr 0 percent per ds.y Contaiil!!len~ Volu:ne Sprayed Fraction 0 .. 73 Unsprayed F:ractio~ 0.27 Cont&in::.ent Mixing Rate :Betw--een Spreyed and Unsprayed Volm:.e 2.0 unspreyed volu::es psr hour Contaim:ient Spray System Ma.xiI!lUI:1 El.e=ental Iodine Deconta.::ina.tion Factor 100 .

Reo.oval Coefficients Eleoental Iodi:ie 10 per bour Particuiate Iodine o.45 per bour Organic Iodine 0 X/Q Values (seconds per cubic meter)

Exclusion Bounde.r-.r O~l hr Iov Po~ulation Zone 0-1 hr" 0-8 hr 8-24 br 24-96 hr 96-720 hr Effective Caustic Sp:-ay Initiation Delay 'r'~ O*seconds Atl:4.cA mt,d:- 13 0

p59

e A-2.

TAELE 3-2 Assu."':l'Otions Used in the ~CCS Leaka~a Anal~sis Pover Level Opera.ting Ti:i.e 3 yr

• Fraction of Core Iodine Inventory in ContaimneLt Sump 50 percent Volume o! Containrn:int Sump Wa.ter 1.65 x 106 liters Sump Wa.ter Temperature < 212 :F Fraction o! Iodine Released.to Building Atmosphere from Recircula.tion Lee.ka.ge .1 Filter Efficiency for Sa.feguard.s Area. 90 percent Technic&l. Speci!ic~tion Leak Rates as Function ot Ti.I::.e r-Tillle

~5 min Value in cc/hr O*

5-20 min :964*.*.

20 min-30 days ~,800

'Note: Tvice technicaJ. specification leak rates vere used

• p60

.e TABLE 3-4

. ""'* Assu.."'mtions Used in Control Roon Ix>ses Volume 2.23 X 105 CU tt Filter Efficiency 90 percent Breathing rate for entire 30 days 3.47 x 10-4 m3/sec Unfiltered 8.Ild filtered inleakage as a !unction of time Filter~d Unfiltered 0-1 hr 1 hr-30 days *

. 0

.200 2,000 cfm ctm.

10 ctm 10 ctm.

LI~tg

., $100 ~

~ ~o ,. .

Atmospheric dispersion t (seconds per cubic meters )

0-8 hr 8-24 hr 1-4 davs 4-30 davs Unit l contai rm:ent to l 4.2 10

-4

,--~ control room intake X i  : '

~ __ _)

Unit 2 conta.iilment to control roon inta.ke Ventilation vent to control room intake Operator occupancy !actors

~br 8-24 hr l-4 days 4-30 d.avs F&C";or 1 1 o.6 o*.4

?..~

~;_)

p62

l

~ TO:

f ,....-, H*11 1~ ...... :

LOCATION C/

SUBJECT / REFERENCE / J.O. NO .

St~.-~0 -t-r: ~e~Q *~

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SeE E:. WEBSTER ENGINEERING CORPOR.

CALCULATION TITLE PAGE

• SEE INSTRUCTIONS ON REVERSE SIDE

.&.5010 64 !FRONT)

CLIENT 6 PROJECT \JEFCa PAGE 1 OF 23 +AH.if~.

-*cA LC U LAT ION T 1-T-LE-(1-nd-ic_a_ti-ve_o_f-th_e_O-bj-e-ct-iv-e)-:- QA CATEGORY (v')

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INDEPENDENT REVIEWER(S)/DATE (S) REVIEWER(S)/DATE(S) CALC NO.

OR NEW

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DIVISION Ei GROUP CALCULATION NO. !OPTIONAL TA~K CODE 1254Co.\~ NT Rt>* lJR- Ol\4 -a 4

5

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16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

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41 c.ons1 der..s Cllt 1nf11Je re1-k cf 2. 200 cfm.

42 43 44 45 46

• .* eSTONE a WEBSTER e

ENGINEERING CORPORATION CALCULATION SHEET A 5010 65 I

CALCULATION IDENTIFICATION NUMBER I

12e4~ I,~

J. 0. OR W.O. NO.

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2 3

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40 41 42 43 44 45 46

-NE e. WEBSTER ENGINEERING CORPOWON CALCULATION SHEET A 5010.65 CALCULATION IDENTIFICATION NUMBER OPTIONAL TASK CODE PAGE S 2

3 4

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\._..-' 42 43 44 45 46

_j

-ONE e. WEBSTER ENGINEERING CORP.ION CALCULATION SHEET CALCULATION IDENTIFICATION NUMBER J.O. OR W.O. NO. DIVISION & GROUP I CALCULATION NO. OPTIONAL TASK CODE PAGE _jg_

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- N E 8. WEBSTER ENGINEERING CORPO-ON CALCULATION SHEET CALCULATION IDENTIFICATION NUMBER J.O. OR W.O. NO. DIVISION fio GROUP CALCULATION NO. OPTIONAL TASK CODE . PAGE.:l_

\ 284~. J":) NT Rf UR - Ot\-'\-0 2

3 4.

5 6

7 B

9 10 11 12 13 14 15 16 17 18 19 20 2I 22 23 24 0-1. ~.. 0 25 26 V 27 28 29 30 3I 32 33 *'

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~NE 8. WEBSTER ENGINEERIN~ CORPO-ION CALCULATION SHEET CALCULATION IDENTIFICATION NUMBER J.O. OR W.O. NO. DIVISION f, GROUP CALCULATION NO. OPTIONAL TASK CODE PAGE _8_

- I

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3

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. \ ... > 43 44 45 46

S-E e. WEBSTER ENGINEERING CORPOR-N CALCULATION SHEET CALCULATION IDENTIFICATION NUMBER J.O. OR W.O. NO. DIVISION Ei GROUP CALCULATION NO. OPTIONAL TASK CODE PAGE_..z__

\<

I .-,~A f I :_Q ,'-a, I-' NT ~p 'ue - 64A - o 2

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32 33

( * \2e:.6iCo.\~ -~t-o3<c-o lu R~ ~ A.. ) V 34 Therefore , ~ ti*tte.. i"ter~ -for- Co"+~nu?1ct° Leo' Rafe ayq, ~l.lmed -lo~

35 36 o.) Id ~ inferv& 0 - f 070 ~c.

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\ ... _... 42 43 44 45 46

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. iiQNE e. WEBSTER ENGINEERING CORPOR~ON W CALCULATION SHEET

• A 5010 65 I

CALCULATION IDENTIFICATION NUMBER J.0. OR w.o. NO. DIVISION ti GROUP CA:CULATl~N NO. 'OPTIONAL TASK CODE PAGEJ.Q_

128"\b. I~ \"IT Rf' UR.- 0"1"1- u 2

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e STONE 8. WEBSTER ENGINEERING CO.RATION CALCULATION SHEE,,.

"'- 501D-65 CALCULATION IDENTIFICATION NUMBER

.~ ......

J.O. OR W.O. NO. DIVISION Ei GROUP CALCULATION NO. OPTIONAL TASK CODE PAGE_Jj_

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-PART i 5

6 7

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17 18 19

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A 5010.65

-STONE 8. WEBSTER ENGINEERING CORPO CALCULATION SHEET

.* ION CALCULATION IDENTIFICATION NUMBER J 0. OR W.O. NO.

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\ ._u . ~ * \~ I DIVISION NT e; GRC UP RP CA~CULA~ION NO. !OPTIONAL TAS~ CODE LR.- (jA4-0 PAGE~

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.ONE El. WEBSTER ENGINEERING CORPO.ION CALCULATION SHEET

.& 5010 65 CALCULATION IDENTIFICATION NUMBER I . 1 0. ()R W.O. NO. DIVISION & GROUP CALCULATION NO. OPTIONAL TASK .CODE PAGEn_

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(, ---._ '

As.sunrotions Used i!:l the LOCA Dose A.."le.lysis Pover Level 2,490 M.rt Opereting Tine 3 yr Fraction of Core Inventory krs.!.leble for Leakage Iodines 25 percent

?ioble Gases 100 percent Initial Iodine Conposition in Conta.ii:.:nent Elex:~ntal 91 percent Organic 4 percent Po.rticuJ.ate 5 ~cent Contain.~=nt Leak Rate 0-390 sec -+ o - I 070 .sec

• 0.1 percent per day 390 sec-1 hr~ 1070 ~ec - _I hr O. 05 :percent per day After 1 hr . 0 percent per day ContaiD!!lent Volu:ne Sprayed Fraction 0.73 Unsprayed Fraction 0.27 Contain=ent Mixing Rate Between Spreyed and Unsprayed Voltl!:!e 2.0 unspreyed volumes per hour Containn~nt Spray System

,~~-

\_, ___ j MaximUI:1 Ele:nental Iodine Deconta.tlnation Factor 100 .

Reoova.l Coefficients Elenental Iodi:ie 10 per hour Particulate Iodine o.45 per bour Organic Iodine 0 X/Q Values (seconds per cubic meter)

Exclusion Boundar-J 0.:.1 hr Lov Population Zone 0-1 hr' 0-8 hr 8-24 hr 24-96 br 96-720 hr Ef£ective Caustic Spray Initiation Delay Ti-l:le O*seconds lttf::4.e.h me~ 13 1 _)

p59

• • • TABLE 3-2

.Assu.-:rotions Used in the ECCS teake~c Analysis Pover Level 2,490 Hw1.

Opera.ting Tice 3 yr

• F~action of Core Iodine Inventory in Containment Sump 50 percent Volume of Conta.im:Lant Sump Water l.65 x 106 liters Sump Water TeI:IPera.ture < 212 F Fraction ot Iodine Released to Building Atmosphere !rem Recirculation Lee.ka.ge .1 Filter Efficiency for Safeguards Area 90 percent Technical Speci:f'ics.tion Lea.k Rates as Function ot Ti.J.le

/ ......... '

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TABLE 3-4

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