ML20063M405

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Public Version of Revision 2 to Emergency Plan Implementing Procedure HNP-4851, Emergency Classification Determination Based on Effluent Monitors
ML20063M405
Person / Time
Site: Hatch  Southern Nuclear icon.png
Issue date: 08/05/1982
From: Nix H, Rogers W
GEORGIA POWER CO.
To:
Shared Package
ML20063M400 List:
References
HNP-4851-01, HNP-4851-1, NUDOCS 8209140045
Download: ML20063M405 (10)
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{{#Wiki_filter:... _ _ ...m-.. .f GEORGIA POWER COMPANY HATCH NUCLEAR PLANT PROCEDURE Emergency C1.assification Determination Based On Effluent Monitors PROCEDURE TITLE HNP-4851 PROCEDURE NUMBER Lab RESPONSIBLE SECTION N SAFETY RELATED ( X ) NON-SAFETY RELATED ( ) a_---__-_---__--_.----_--. APPROVED APPROVED REV. DESCRIPTION DEPT. PLANT DATE ' N..- HEAD MANAGER f&mn ' b (? / ) ~ ~ 2 PD9e 2 / C 2/ . a, J.h... / . /, / / 4 . U-w_.,4._ - _ _ M., 3 [.. 4 ! 3 '. 4 J / gQJ '., pu d k h j'.,.7 [ 8

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_m.....__.____ _m.___.- (.g CBOCCOU'.!G BEE'IO100 J1EOLn.IGI k Q P.ROCCCURE NO. HNP- / Revis. ton No. .Y8Ui$TFD nY--------------' sj anc,ny..,?.~F):I A! /.O /.T i.:o?5_. D'-i)75 ..]' -~ 7 -- t Namet Date; __ e cwtui f / J / '{. WQ 'U 7 // / 8 l / b A3 $5-f N < O', h Y0 catt,V.,:' - REVISION CHA.:GC5 MODE OF.CPERATION OR INTENT AS DEGCRIPED IN FSAR: ( ) Yes ( ) No CHANGE INVOt.VFS: ( )'An unreviewed Safety Guestion ( ) T'e ch. Sp e c s. ( Neither (See back for S,foty Evaluation if required). Safety Related i l ) Non-Safety Related ( ) Safety /Non-safety Status C:.ange ( ) Yes ( ) No s.c. Attach marked up copy of procedure to t h i's form. ~ REASON FOR EZGUEST d/* / I(d_ [. !/ <(/ A Q 'f. j w // TA't7 / __.b-l b l [2fa_ igtfr/ h/kwpG st( Ah ~ hk/ kgr din e l& a .Ue f dv ds u et%f m A_--- s_ A 7i,a t NWf2bv L. 2 .e. 4_=., & g ee -_e.y -4Q _-w_ -= b. ~ ~ ~ w e, ann ____-em- - me - e a.m - ese _ __,[de.___dA____ _ enn ncconnsson ArnRove.:_: c:49es ( )Mn S,*k__-,b.$ O _ = - -- _ s. y.n c. .__ m ------ PRB Nu:nber CDs,4{c'.".5 f i s 4 s.l,a@. -w a s.,

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..m ~o 't See Title Page 1 of 8 !f EMERGENCY CLASSIFICATION DETERMINATION RASED ON EFFLUENT MONITORS NOTE This procedure supercedes HNP-4608 Revision 7. A. PURPOSE To describe a method for determining the Emergency Class using . gaseous effluent monitors when releases are being made. B. EMERGENCY CLASS RELEASE LIMITS 1. Alert Emergency: Gaseous releases are greater than 10 tiras Tech Spec Limits Section 2.1.3.a.

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s 2. Si te Area Emergency: Gaseous effluent monitors detect levels corresponding to greater than 50 mr/hr for 1/2 hour or greater than 500 mr/hr W.B. for two minutes (or five times these levels for thyroid) at the site boundary for adverse meteorology. 3. General Emergency: Effluent monitors detect levels corresponding to 1 rem /hr W.B. or 5 rem /hr thyroid at the site boundary under actual meteorological conditions. C. REFERENCES 1. HNP-4621 2. HNP-4721 3. HNP-4850 4. Emergency Plan Section D. 4-d I m n % p%y.,, y 7 c yg ;$ v.v,. ,n \\ g;/ g* -

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Georgia Power A 2 [ S,e e Title Page 2 of 8 D. RELEASE RATES Determine release in curies /sec for each release point using procedure HNP-4850. Ci/sec 1. Main Stack' (GNs) = Ci/sec 2. Reactor Building Vent Unit 1 (GNvl) = Ci/sec Reactor Building Vent Unit 2 (GNv2) = Ci/sec Recombiner Building Vent Unit 1 (GNv3) = (if no alarm enter zero) Ci/sec Su.a of Vents (GNv) = j E. ALERT EMERGENCY Declare alert emergency if either of the following two equations are satisfied ins tantaneously. 1.703 GNs + 23.815 GNv Greater than 10 l 1.703 ( ) + 23.815 ( ) = ( ) + .( ) = or I 2 3 1.0 X 10 GNs + 1.5 X 10 GNv Greater than 10 1.0 X 10 ( ) + 1.5 X 103 ( ) 1 = F. SITE AREA EMERGENCY Declare Site Area Emergency if the follcwing two equations are satisfied for time period. k 1. GNs + GNv Greater than 1 for longer than 30 minutes 4 } O.9 1.2 E-2 l t' ( ) +1 ) = i i O.9 1.2 E-2 4 2. GNs + GNv Greater than 1 for longer than 2 minutes 9.4 1.2 E-1 ( ) + ( ) = 9.4 1.2 E-1 1 I 1 i )D V' % ,QP y m I ~ g ' ? " J L*[ q% 3 ,, '

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E. l. Hatch Nuclear Plant ociou, ~o See Title Pags HL vs%ON %O Georgia Power d c... 1 See Title Page .., o 4 3 of 8 .G. ' GENERAL EMERGENCY i 1. Check air temperature difference (Delta T) recorder and wind direction Delta T =

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~ recorder readings (W.D. recorder W.D. = indicates which direction the wind is coming fra'. m 2. Based on Delta T, apply applicable Pasquill Category in Chart 1 CHART 1 PASGUILL ATMOSPHERIC STABILITY CLASSIFICATION USING DELTA T MEASUREMENTS - 1 + 0 ) -0.9 -0.3 ______________._____________________.___________________+0.9 ~ C < - O. 9 - O. 9 5 D < - O. 3 - O. 3 4 E < + 0.9 + 0.9 ___________________________________..________________________F> PASGUILL CATEGORY 3. Determine average wind speeds for periods of release intervals from recorder P62-R900 (Hil-P658). Use the 150 foot elevation wind speed recording. 150 Foot level average wind speed U so f (uncorr.) = 4. Correct indicated wind speed to determine speed at top of main stack. Use table 2. Us = (U150) X (Us) mi/hr = TABLE 2 RATIO OF WIND SPEED AT MAIN STACK HEIGHT TO WIND SPEED AT MEASURED HEIGHT PASGUILL CATEGORY RATIO C 1.13 D 1.24 E 1.47 F 1.47 5. Using Us, U/so, Pasquill Category, and Tables 3, 4, 5, and 6, determine R/GNs, R/GNv, R/GIs, andR/GIQ7.%,,,, I

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