ML20101P643

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Pressure Mitigating Sys Transient Analysis Results, Suppl to Jul 1977 Rept
ML20101P643
Person / Time
Site: Catawba  Duke Energy icon.png
Issue date: 09/30/1977
From:
WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML20101P642 List:
References
NUDOCS 8501070215
Download: ML20101P643 (68)
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{{#Wiki_filter:f** RC 1223 03-00 \\ e ~ ~~ SUFPLEMENT TO THE JULY 1977 REPORT 1 PRESSURE MITIGATING SYSTEMS TRANSIENT ANALYSIS RESULTS I a Prepared by WESTINGHOUSE ELECTRIC CORPORATION FOR i THE WESTINGHOUSE OWNERS GROUP ON REACTOR COOLANT SYSTEM OVERPRESSURIZATION September 1977 l 8501070215 850102 PDR ADOCK 05000413 p PDR l L:

O NC 1223 03-00 1 TABLE OF CONTENTS k. PAGE e. 1. SUPPLEMENTARY LOFTRAN HEAT INPUT RESULTS I A. SETPOINT OVERSHOOT VARIATION WITH RELIEF VALVE I OPENING TIME B. SETPOINT OVERSHOOT VARIATION WITH RELIEF VALVE 8 SETPOINT O C. SETPOINT OVERSHOOT VARIATION WITH NORMAllZED 14 STEAM GENERATOR UA ( D. SETPOINT OVERSHOOT VARIATION WITH REACTOR COOLANT 27 SYSTEM TEMPERATURE II. INSTRUCTIONAL GUIDE FOR OVERSHOOT DETERMINATION 31 31 A. GENERAL 33 B. PROCEDURES C. ILLUSTRATIVE EXAMPLES 34 ? ( l

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ILLUSTRATIVE EXAMPLE 1: 34 DETERMINATION OF SETPOINT OVERSHOOT GIVEN RELIEF VALVE SETPOINT AND RELIEF VALVE OPENING TIME WITHIN GENERIC ENVELOPE 2. ILLUSTRATIVE EXAMPLE 2: 38 DETEmilNATION OF SETPOINT OVERSHOOT GIVEN RCS VOLUME AND RELIEF VALVE OPENING TIME WITHIN GENERIC ENVELOPE 3. ILLUSTRATIVE EXAMPLE 3: 42 DETERMINATION OF SETPolNT OVERSHOOT GIVEN RELIEF VALVE SITPOINT AND RCS l VOLUME WITHIN GENERIC ENVELOPE 4. ILLUSTRATIVE EXAMPLE 4: 45 DETERMINATION OF SETPOINT OVERSHOOT GIVEN SG TUBE HEAT TRANSFER AREA AND RCS VOLUME WITHIN GENERIC ENVELOPE 5 ILLUSTRATIVE EXAMPLE 5: 52 DETERMINATION OF SETPOINT OVERSHOOT ~ GIVEN SG TUBE HEAT TRANSFER AREA AND RELIEF VALVE OPENING TIME WITHIN GENERIC ENVELOPE il

30 1223 03-00 's PAGE 1 6. ILLUSTRATIVE EXAMPLE 6: 59 DETERMINATION OF SETPOINT OVERSHOOT GIVEN SG i TUBE HEAT TRANSFER AREA AND RELIEF VALVE SETP0lNT WITHIN GENERIC ENVELOPE 66 REFERENCE G 8 I [ C l e iiI i ~.

NC I223 03-00 .l ~ 1. SUPPLEMENTARY LOFTRAN HEAT INPUT RESULTS A. SETPOINT OVERSHOOT VARIATION WITH RELIEF VALVE OPENING TIME O O 9 e i

i ..h 1.2h). 03.-04,.,, i 2 l t EFFECT OF RELIEF VALVE i .. _. j OPENING TIME ON RCS i .. l. _, PRESSURE OVERSHOOT ( l i 4- - RCS PUMP STARTUP IN 1 LOOP I l - LillEAR RELIEF VALVE j l l - VALVE DELAY = 202. OF OPE':!;1G Tl!'.E - lillTIAL itCS PT.ESSUF.i. = 300 PSIG - RCS/SG AT = 500F 2 { - SG HEAT TRAtlSFER AREA = 58,000 FT - RCS VOLUME = 6,000 CU.FT. i l l '__4.__._.. . _ _, _ _...; _.. _ _.. ;.___ _ __9 I i l 13.0 e ~ n J. .iRELIEFVALVESETPOINT= 350 PSIG m _ _.. q.._ _ _. a _ _ _. e 1 l l t i ~ 1 l l 1

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l. Figure 2 .q-t t i i i I 1 j l i l EFFECT OF RELIEF VALVE l l OPENING TIME ON RCS ...;.... __2..... PRESSURE OVERSHOOT l i - RCS PUMP STARTUP IN 1 LOO? l - Lit! EAR RELIEF VALVE - VALVE DELAY = 202 0F OPLtilNG Til1E - IfflTIAL P.CS FitESSt!RE e 300 PSIG ItCS/SG AT = 500F "i - SG HEAT TRANSFER AREA = 58,000 FT l u. _....a RCS VOLUtiE = 13000 CU.FT. I I i I l 1 i i l .t... .i. ....a...-_.......5... ? l t t 1 L t l i i i

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.l j RELIEF YALVE SETPOIllT.= 350 PSIG l l l l i i i 1 I { l l l so I i } i l i i i i l-i i i t t i L l 8M l t i i 1 i i i I I l l l l =r.; 'p i k l 2_ I p7 o. I i i l p, [ .y i-l /l 'l! g~ [i htP l 1 [,, _i i / / ii# 1 i i I-g ~ l q- [ l /M'fr I l - SG HEAT TRANSFER AREA = 50,000 FT - RCS VOLUME = 6,000 CU.FT. IN - l i ......_._j-..-.... i I I ...RELIEFVALVESETPOINT=hh0PSIG i l l t f l l2.0 - g f I-I i /i i i m - g i i i l 1 I i _a _ __a.. ._a i ! :n l l l -l l l I I I i I ~ /[ = l l i l j i i i I I l 2 i 6 i

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h l I i Figure 4 1 'g l l j t t o l i EFFECT OF RELIEF VALVE I i CPENING TIME ON RCS l. PRESSURE OVERSHOOT i i J I I -l - RCS PUMP STARTUP IN 1 LOOP . 4.. _ ;....._ _. _ _..j... - LillEAR RELIEF VALVE l l VALVE DELAY = 20% OF OPE!!!!!G TIME I!llTI AL RCS Pi' ESSURE = 300 PSIG ._. _) ..___ - RCS/SG AT = 500F 2 SG HEAT TRAliSfER AREA = 58,000 FT l " ' - - - - ~ RCS VOLUME = 13000 CU. FT. _.....5._. t i I i I j i I t t j g I l RELIEF VALVE SETP0lHT = 400 PSIG i i 9.._._. _..__g.._._._...... g. 9. .y.......g.__. I I ~ l i l [ I i

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VALVE OPENING TIME, SECONDS l

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O NCn 122343--00-- i EFFECT OF RELIEF VALVE Figure 5 ) OPENING TIME ON RCS l i i PRESSURE OVERSHOOT l 2 l - RCS PUl1P STARTUP IN 1 LOOP l j - LINEAR RELIEF VALVE g j j - VALVE del.AY = 204 0F OPENil!G TIME e ,,, ' _ ' - INITIAL RCS PRESSURE = 300 PSIG { . - RCS/SG AT = 500F a- - SG HEAT TRANSFER AREA = 58,000 FT 2--- - RCS VOLUtiE = 6,000 CU.FT. l ~ __,l_...._.i . _.1... .. i i y. } }

RELIEF VALVE SETFOINT = 500 PSIG

[i. l -i4 ..... 4, _....,j. _.... ... = y _ _ j. _..... I i m I i o C 4 i l ~ t e M4 = y. I, V t i g I Y

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NO 1223 05 99 9 9 B. SETP0lNT OVERSHOOT VARIATION WITH ~ RELIEF VALVE SETPOINT 4 4 S l o i S l

30 1-223 03 ' i 2---- l l l Figure 7 i i i .._____j...__...j. 2 t i i i j EFFECT OT r.ELIEF YALVE SETPolNT OH PRESSURE OVERSHOOT " '~ ~ T ~ ~ I i e l l I 1_ _ _.._L 4._ _ _. a. i i L......:- _ _.. '..._...__L...__!..-_...:.._.

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i i i acs VOLUME, CU. FT. _ l l i o A i 6 ~ t ~ E l l _.. _i _ _.__ _ _;__ _ _g'.. N 6000 3, a. i i i r. ( M I 13000 i a. i. 8 t ._..L....... I ? ..,.....1.._:. a. i i 1 1: h! [ -S$' l l g i 3 ze l l i i u.! RCS PUP STARTUP Ill 1 LOOP f%3 I L l t - 3 SEC. RELIEF VALVE OPENING h! p. I l._ l - It!!TIAL PRESSUP.E w 300 PSIG i I l - - RCS/SG AT = 50*f W i l ~ INITIAL RCS TEMPERATURE = 1000F - SG HEAT TRA!!SFER AREA = 58,000FT2 l l l i i i e i i i I i n 3 s 1 6 ,2h l i I i 4&D

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I..jeo.1 T ii i i .i t I i i i i g .. SETP0lNT, PSI G 1.. I -...._-i--- ( i i i i i p 7 I l l 1 I 1 9

.8__ -l- - j l i [ Figure 8 i I i l I EFFECT OF RELIEF VALVE SETPolNT ON PRE 55UPI OVERSHOOT j r l f l l RCS VOLUME, CU. FT. I i i -- n_ i I L _...i.... : i __.t._.. ..__...j. fee i i 6000.___ i i l i .i.._,...... I l ~j [ ~~ ~ i I i t j i l ,e i L 3 8 1 I i i a I i i l i i i i I I I 13000- !.. z.... _. H l/ i L '. -_..y .-g t t z I l l b t/ / u p. I na !

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i i 1 wi / ! t I i I.g r i[ i l i i ,i -- i i i l e e-i 8 M! / l l~ ,1 s ' l-4 7 l I I - RCS PUP.P STARTUP hN1 LOOP - 3 SEC. RELIEF VALVE OPENING a - INITIAL PRESSUF.E = 300 PSIG l 6 l i l l-RCS/SGAT=50*f "-i* = d ' - INITIAL RCS TEMPERATURE = 1800F l 2. --.' l - SG HEAT TRAfiSFER AREA = 58,000FT l i l i i l l l 3 i 1 i i i I i l l 4 n apts' i 4ee 49 8 Kee. - 1 -i i I I i i i i i i i e SETP0lNT, PSIG j j j i I 2 i j i i l l t 10

g 30 1223 03-00 l ......'._. _..{ Figure 9 RCS VOLUME CU. FT. i go = 6000 r EFFECT OF RELIEF VALVE SETPolNT .( ON PRESSURE OVEP.3H00T i .....j l ~ i i l Me =

p. _ __...j._.

...._2_......j. i i 1 i i i 'w = 13000 L......;. _ _ i t ~ ] . l... J f f f 1 l f! l ^ .. g; j y _' i i i/; i / i i i n . / i _ o _._g, l l l l 1 l l 1 h 4 ... w ~ # 1 i i i ( 'i l /. i i I l 1 / .g-4e l t a { p....._. f f i I It -[ 'l j RCS PUP.P STARTUP !!! 1 LOOP l 3 SEC. RELIEF VALVE OPENING 28 b ,o r A I IllITIAL PRESSUP.E = 300 PSIG o, l ! - RCS/SG AT = 507 h =s l O2 INITIAL RCS TEMPERATURE = 2500F ? l ac SG HEAT TRANSFER AREA = 58,000FT2 = I 3 l l i 1 i I i i i i. l l l l i i i o ~ + 3te

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De i. il l i-I l l i I f SETPOINT, PSIG ( i l. i l i i l i i i l .l I l i n

l l .+ ,_... _ _,...... p... Figure 10 - i s t i j. . 1. a. i j l I l .1 -....~. _ r i p.- .+- .l EFFECT OF RELIEF VALVE SETPOINT i

ON PHE550RE OVEhSliOOT l

.....h. _.... }....... ]...;. J. .. _.. _ _.s.. i - RCS PU ? STARTUP ill 1 LOOP ~ i j__ - 1.5 SEC. RELIEF VALVE OPENING p i - 1NITIAL PP.ESSUP.E = 300 PSIG r - RCS/SG AT = 50*f i l i I-yd- - INITI AL RCS TEMPERATURE = 100 F 0 k 2 I L. - SG HEAT TRANSFER AREA = 58,000FT 1, l i r i j ..l... j i i l i '. 3g, l i i a. ,i i .=_ j j 1 i i I 1 i .. h s tal j j RCS VOLUME, CU. FT.. a."-Ed I i r I-8 I' -. 8 ~ 6000 k' l .l . a. i 13000-i, l' j;7 ~ 1 i i 1-l: .i ~ 1 i i i i I I ' ' d,. ~! l j. I.. 'l l I bI k t l l ~l f f I t l ? L i ' ^l~ a. a' t' i W i f^a !4r0 400' ~ rw 5 i i i i i i i l i r l, i i i SETPolNT, PSIG I. i I t i f e t u 4 f . i. t. i. I f 12

. '. m e t A *k __ O O i . gb ], c. c. / ' - 4.... .;..... Figure 11 ) 1 l I EFFECT OF riLf EF VALVE SETPolln, j y OH PRESSUPi CVET:SliOOT . ( 1-...... 1..... 1,. i, i i i n_. .4 - RCS PUMP STARTUP ill 1 LOOP ..d.-. I 1.5 SEC. RELIEF VALVE OPENING ~ l - 11;ITIAL PRESSU?.E = 300 PSIG i -RCS/SGt.T=50*f l l#8 i -~ - INITIAL RCS TEMPERATURE = 250 F T" 7 " ~~ i ~ 2 l - SG liEAT TRA'!SFER AREA = 58,000FT -... i.. _, _.1. - l l l J g RCS VOL.UME, CU. FT.- O 8 g 6000 10 = /. i i ~ i f i / I l-I i I-3000 _i i l / / i l l / /! ~ ~~ El** ~ i i i 4 If ~ ~

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i I i. i - l. 1 i-1 $ETPOINT, PSIG j i i .I ( g I, 2 i l ~l i l 13

50 1223 03-00' ~ C. SETPOINT OVERSHOOT VARIATION WITH NORMAll2ED STEAM GENERATOR UA O e ( 14

.L. _ _.. 1 i 30 122borbam i l EFFECT OF STEAM GENERATOR UA ON i i .1.. ......a .._.-.__._.y._-. j PRESSURE OVERSHOOT i. j l

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.4... i I t l ,,u i I i i i i I i i I i .__._ _L i / i I i j i i i i i .....L.. ..] _. I i ./ g . k, Q .._.O i l di?,i _I l .e: e h m. s w I .. ! e. i '/ Q .~7~~1--'~-- j i [ 1" i i -i /; 1 I 4,y c I i. i, 11 i i,/ y -. i m a ,s I. ,.r. i. i i ,/l j j i i i M -. _._- L -. .. w ./ i i 8 .--- l S-i j i i e w w a %l l j -j fl i ( H :d ---- . 0. l l ./ 3'SEC. RELIEF VALVE OPENING TIME f _E a: l i t' i i i i[/ l 'r 1 1 I I i l //! l I I p* i Gi i I

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s i t t -} ..b/ . l l l i 4 i i rec . e,w l /t/ l' i i 7 N i [j i i l i i i i t I i/ I - RCS PUMP STARTUP ill 1 LOOP ~' p /: I - RCS VOLUME = 6000 CV. FT. Y<: I W O !'I - INITIAL PRESSURE = 300 PSIG I~ b' l -RCS/SGAT=50*f I - RELIEF VALVE SETPO!!iT.= 350 PSIG i 1 j 1 2 .i .t - SG HEAT TRNISFER AREA = 58,000FT l. j j l i q.. ] l'd I goe too i !'l I I l l 1 P -P l l MAX SETP0 INT' PSI i l + 1 i i l l l 15

6 I ...._. a.._ EFFECT OF STEAM gel'ERATOR UA ON i-- -- Figure 13 PP. ESSURE CVERSHOOT

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i i - RCS VOLUME = 13000 CU. FT. / f'f ~1 l - INITIAL PRESSURE = 300 PSIG l' l]: l -RCS/SGAT=50*f. .i i - RELIEF VALVE' SETPOINT = 350 PSIG l I 2 -- - SG HEAT TRANSFER AREA = 58,000FT 1 i t l i. -P e g i I t l l los I l l seo l ap l i i I l I l P -PSETPOINT' PSI MAX 1 i l l l l t l j 1A

e WC 1221 03-01 q. l _7.. -.. 4.. Figure 14 e i t. t EFFECT OF STEAM GE!: ERAT 03 UA Oi! PRESSUl;E CVELSH00T i \\ 7. _. .._..4..__......;. ..+...._4..__ l i _c,3e l . I .,i i 3 SEC. RELIEF VALVE OPENING TIME, ~ ~ -..-.i_... :. .i $, g / " ~ ~ ~ ~ I i l 1 ,l l l l l i i i i i k~ O O I !/ ; g 1 - &o-e I k i i / i i o -l O l I l ~ _. 4,_2, 1 i I / i ~ i I 1 I g. I i i i i 'Q ;/ i _- I i/ i / j i i i x, _ / I / i ~/! i i I ~EI I d/l ./. if o p !- W /l .I / l / l 1 i ~5 i. 3 :/ i

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. d - / i i / e97 i / p n L' /. 1/ l i h) Y' -RCSPUMPSTARTUPill1 00 ,,3 i l ' - RCS VOLUME = 6000 CU. FT. s: Y . /' !j / - INITIAL PRESSURE = 300 PSIG l -RCS/SGaT=50*f - RELIEF VALVE SETPOIliT.= 20 PSIG - 2 l l - SG HEAT TRA!!SFER AREA = 58,000F7 __ i j I I i. i i. i. i i. i l 1 l I I ? 4 e } l l f.$e. 'I 200 l q......_..I P -PSETPOINT' PSI MAX t t i .i I'i: i l l 1 i 17

h l 2 i - EFFECT OF STEAM GEftERATOR UA ON Figure 15 i i PRESSURE OVERSHOOT I t '.. l.. ...j. i i i ~ i i i I i l }.. L. _. ;. i - ;,u l I i i a... . p.... i _..p... M, l i i o 1 'I t La e W-I i i i -l / 1 i l I i er

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f;,. m /I j Ow 3-I f ; ',/. -- U I -/ li 3 SEC. RELIEF VALVE OPENING TIME W f a.-. n. p g ') f J ..n / / l / /i s i i i a a Y[y /./ ! l = m // i i W/ i '/ /. i I i - C.i ' c rie y [f

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g n t ~ ~ //l l - RCS PUMP STARTUP IN 1 LOOP / // l I - RCS VOLUME = 13000 CU. FT. / ((: l I - INITIAL PRESSURE = 300 PSIG i / /l/ - RCS/SG AT = bO'f. l - RELIEF VALVE'SETPOINT = 400 PSIG i I p ' - SG HEAT TRIJtSFER AREA y 58,000FT I 4 I i i. I. j i-i I i 1 i 4 ....I _...100 I be t l l i, P P MAX SETPOINT' Psl i I i l -l i l 1 i i i i o nn

o) L yC 1-223,-03=00-i i - - - _.. ... 7...... q ._.j........, Figure 16 2 i l j

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I EFFECT OF STEAM GENERATOR VA ON l I i -i-- --. PRESSURE OVERSHOOT..- 1, I i i ,,3, ...... i....... ]... .j....}.._._._.. [ _.._. - t i 1 i -] . _j _. _. L i i i i I I g .I i i los I i m 4 l i l T! i ._. g% !/ i i !/ / i I / i i + I'.~ eao --i r f .f! i/: f/ ~l 7-l/l i f i i ~ i /' !/ ; i ! /! 2 _.L i I fi I/; A / I i ~ ( _E!_ !.g / '/i ! fi i fi / J/. l --

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/l i i I D' ./; /; y 7-I - RCS PUMP STARTUP IN 1 LOOP -i / f 7. f RCS VOLUME = 6000 CU. FT. y.f f f f - INITIAL PRESSURE = 300 PSIG i. i - RCS/SG AT = 50 7 i i. i - RELIEF VALVE SETPOINT.= 500 PSIG 3, .i

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.l: 2 - SG HEAT TRANSFER AREA = 58,000F7 - l !l: 8 1 i j l I j g

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--C -l 200 O. i i700 1 1 SETPOINT' Psl, P -P MAX 1 i i j 'l l

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/a3 1- - Figure 17 4, t, EFFECT OF STEAM GENERATOR UA ON i PRESSURE OVERSHOOT ,._3 I i l .t l' ________] ..... ;... _ z _... _... i i - - b--h- .. j. f _.... j. _.._ _ ' j b l l 1 l ..i-I i ,/ l i i 1 1 n'l J i f h l l f'. -e-I i i -. I -!: __f r. / I i i= 'i / ./ l l i !i t '/ : !/ 1 i ..rt.i ie l = m r-V t /. t g d /i j/ o i i i W lo f f f g 9"# . E7 /i /i i g g ge / /I I i i i _._-...:_._.._a Aa./ /: i .i: D / )( i f f a- ~~ # ] i/l l l ,i, l U r i 1 ~ - RCS PUMP STARTUP IN 1 LOOP =. / / I

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/ /; - RCS VOLUME = 13000 CU FT. .h // - INITIAL PRESSURE = 300 PSIG ] l / / I/ -RCS/SGAT=50'f I (([.[ - RELIEF VALVE SETPOINT = 500 PSIG __ I 2 I - SG HEAT TRANSFER AREA = 58,000FT '. I

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g I r i i HI j. l j l ";e .....jho l l l .._200 I I I 1 P -PSETP01ilT' PSI MAX I i l I 20

I u..C 1223. 0 3-00 i j l Figure 18 __ _ _ _ p... ...._ __ -.......j...} i EFFECT OF STEAM gel: ERA 10P UA ON i i 3 i i PRESSURE.CVEi?S C T 33. i i l .. _ ;..... 4_.. } i i .. I oT .[. 3 i /go i ~ ~ ~ ~ I I i i l _.i __. _ _.i l .i } I _ _.i._ t i i i g l ,I_ i i l i c 1 i i i e, e l -I 8 I t i e t ) j s 0120 "S, l _o F l I. I. I I. l 1 i w_ i 1 1 i i /; i i ^ a i .I.. _. S _. i I/i s. g g' a i l t o m W .rs. ..I_. [.. ]... _. _ 5l j l i 1.5 SEC. RELIEF VALVE OPENING TIME Lhl. . h' /.._ _ _. L... i

...._.i_....i _.

1._- i ~ l 1 i i i 1: i z i s' i a l 1 i i I v// >i l -;e; i E F/ / j j i i l 1 ' e,/o -- z - y

' / l i

i 2, / / I i - RCS PUPP STARTUP Ill 1 LOOP s 8 / / - l. - RCS VOLUP.E = 6000 CU. FT. 8: cs -t INITIAL PRESSUP.E = 300 PSIG 1 + w I ./ - / I - RCS/SG AT = 50*f i i t f i t i i - RELIEF VALVE SETPOI!1T.= 350 PSIG l l 2 - SG HEAT TRNISFER AREA = 58,000F7 l i i i i t. l I t t t i i i i i l i Y~ ~ t t ) i O l l /00 _I t I i . 200 ( ~~ j j SETP0lNT,' PSI P -P i MAX ._ q. i i i i l t-i 21

-u,- _._..r__._..._.. _ _..._.g._.. _..;....;.___.. i .L._.....!.... ;.._..j___.... F1gure 19, I EFFECT OF STEAM GEilERATOR UA 0'l I ~ i ~ ~" ~ [ PRESSURE OVERSil00T I .}.. _. ... 7.. _.. i 1 I i i g,g i .I i i i l 0 -4 l.:.__ L_ _ _.. 3 l - i. i i l l I 1 [ { i i i i i g._. _, _.._.. ; i /i i i i 'l I i / I u. i .g,_j .i.. i o I. , ggy l i .[, q ., j j q e j. _... l i e

3..

i om i 4 s i i l 1 8 i i cr... _ 1.5 SEC. RELIEF VALVE OPENING TIME

n. 1, o

x tas LJ / .I l 8 l 1 I i s s s s- __.N.. .... -E-.] i i m l, I t- 't e I u z = = i.. .i. l i. I.i j j j j i j_..:. o.. 6 i g

g g

I 1 I i s i

I

==

,[

.I i 1 l l l 1 RCS PUMP STARTUP !!! 1 LOOP , - RCS VOLUI'.E = 13000 CU. FT. l I 3 ~ I ~i ! - I!!!TIAL PRESSURE = 300 PSIG - RCS/SG AT = 50*f. l b i I I , - RELIEF' VALVE SETPOI!iT = 350 PSIG p 1 i . - SG HEAT TP./JtSFER AREA = 58,000FT L.. f i .p i[ ] l j i i l e i l 1 w n .I l !. 200 l w. 4 ..../M. I O i l i. l. i-I i i MAX SETPOINT' PSI P -P i i 1 i l 1 i 1 l 22

C uC 1223 03-00i l _.4.._ ___ j - .p_ _,.............---- F i g u r e 20 - EFFECT OF STEAM GENERATOR UA ON i PRESSURE OVERSHOOT } j i 4_ _ _ ;, .+ 1 o.so I I i i i i 1 1 I 1 1 I f { / / i i j i F i i / J.,/ l l i i

=:1 a

= s t e ~1 i i i /i i i i i i o -1 i i if: 1 i i i i .to .I ta. l j l j l t t

0. 2

.l.g I l l-- ~l l 1 i i i !/i I g /'! w .j. g. / 1 1.5 SEC. REl.lEF VALVE OPENING TlHE W 3 y 1 f. i i $~ 5 -j i I i i. t. i. i .l i s 2 ___ _ g _ 1 o. mi i .o i "i #/ i. a p/ j f. RCS PUP.P STARTUP lit 1 LOOP i. zoW .' c.48 ---E i .gf RCSVOLUPI=6000CV.FT. ~ 5>5 -E f. i INITIAL PRESSUP.E = 300 PSIG 35 .f.

.f' RCS/SGAT=50*f

[ j. jf .j:/- REllEF VALVE SETPO!!iT.= 400 PSIG x f f ~~~~ SG HEAT TRA!iSFER AREA = 58,000FT-I 1 i 1 i i i 1 l } l j. j 1-d i I i;_ l . soo ' I I l l Jeo '! 'o-i t - P -PSETP0lNT' psl MAX 1-i i 1 i i. i 0 23

rV) .l. Figure 21 i i j i . :.... _..p... I. i l EFFECT OF STEAM GENERATOR UA ON [ ' ~ ~ ~ ~ - - " ~ ~ ~ PRESSURE OVERSHOOT , _. _ _,.. ___ q.._... _... g ... q...... ..w i 1 .. l. I l I/ l / L_. 1 4 i M. /i l l ~ ~~ i i I /i i i i i 6w?/i i i + [i i i }i l l t 4 i. i. i . _y ; l 1 i Ig l l 0.10 54 1 -l- -l l Ilj l-i j l j u. t 1 o.g_f_ l j F _o -l i l t l l L i 8 .=. .. 1 I t kJ j l i e l. t o m .'-[. l 1.5' SEC. RELIEF VALVE OPENING TlHE M,_, g l a w s s t n _r s. I', l I I i l I i a-w . u oa n 3g m i -1 i i i u if .i 1 { l m: _. w. f l l i j J 'p, so.,;- i -RC'SPUldSTARTUPIN1' LOOP /.! I i i Il i - RCS VOLU!'E = 13000 CU FT. .,/ d i - INITIAL PRESSUP.E = 300 PSIG .... _.i I - RCS/SG AT = 50*f. I 1 I j l

I RELIEF VALVE'SETPOINT,= 400 PSIG I

2 l . - SG lirAT TPMSFER AREA '= SS,000FT y ( l 3 i.. 1 t

t I

r I.. l 1 7 'i i . 'i a 1 4'. lg_.._._,!_.._200 l, _... J.....l. e, s 1 t e! i-1 I I e P -PSETPOINT' PSI MAX 1 u i ) i g h ') l { _ l cA

l l I l . l l l i l l _q. _. 3..__ _q .y....l. -- Figure 22 _J l EFFECT OF STEAM GENERATOR UA ON ..___..q...___ i PRESSURE OVERSHOOT l i i l i 1 e.3o - _I. i i l j I 1 ~ l /I i i E/ I I ~ ~~-~$/;I l 1 l l y l-i .J l !/! l i j 3 i l 1 .{. ). a l rl ~ 1 1, I i l l I i i sao - ; -l g, - -l l /. -l l l t-r .j t: Si .I

y:

l l l i M n i m'. i i /i I-I i i I s= l l l l __._ / _o s. J' s "M 'e= l l ! =T i l l i i l-l i i H I i 1.5 SEC. RELIEF VALVE OPENING TlHE __i l 8 'w-l i: j-l .___..n_ .._i l j-i __ e _ y l / .l I al ./ l /- i i 3 __ s @/se / l odo A t i -- p -. ' f. 3 ~ / - RCS PUP.P STARTUP Ill 1 LOOP l ,fj f1 j. - RCS VOLUME = 6000 CU. FT. ._j i j/l / i j -i. - INITIAL PRESSUP.E = 300 PSIG 3

i jf l j/

i - RCS/SG AT = 50*f j _) na - 8 i - RELIEF VALVE SETPOIllT.= 500 PSIG J .!!~ i - SG HEAT TRNISFER AREA = SS,000FT2 _4 i j r i

1

-..?r..' l. -i i i .i i -i t ? I l 1 I p i O g -.( l o l 2 ' ido. l I 20o 8 r P -P l

MAX, SETPOINT' PSI l

.l i l J 25 <w

30 1223 03-00 y,;p,a y,u~,, c8 l ,} } p, J V 4 A

.. 1..... I i ~ Figure 23 J .... -. r l ~ EFFECT OF STEAM GENERATOR UA ON l 3 "~T-~ PRESSURE OVERSHOOT ]~ l l i I I l O.50 l l I .._..)..... j.. I t l j i ev l f i l i /! L i i l i. l ,/ t o l ] l 5. I 1 l fl I t' ~ l C.-30-wg l 8/ / ".

  • ?n.

>6 l l l yt j fl ad - (y / l i i t ___ _ a. t...,: 3 .. g.,

  1. T /

I e w l l I v, n.-..a. i v } j 1.5 SEC. RELIEF VALVE OPENING TlHE l 5 _.a/i / I i l 5 5

a: -

s /l i i l E i ./ I .i-i t o.a / l l l /. i-RCS PUMP STARTUP IN 1 LOOP 1 I

/

, - RCS VOLUME = 13000 CU. FT. l 1 J< INITIAL Pomitor = 300 PSIG I ! - RCS/SG AT = 507 I [ f j - RELIEF VALVE SETPOINT = 500 PSIG 7 SG HEAT TPMSFER AREA = 58,000FT -

t-i i

i. r. 1. I l -i i

l!

ti l i i n a .w i

.../4.0.'

l 2.0..0.. Q l o i 3 i i 1 P SETP0lNT', PSI P I MAX i t d l i E6

MC 1223 03-00 P O e o e D. SETPOINT OVERSHOOT VARIATION WITH REACTOR COOLANT SYSTEM TEMPERATURE S ) e 9 27

O ,MC 122-3=03-00 4-Figure 24 4 i l i i i -i I ,t a i I I I l ~ 'RCS VOLUME, CU. FT. g

j...

l j 2 $O- = j i .l I g o_ ____i W i i l ...I .l~~ 7 i - ~ l/ : ~ ~ T 7, l 17 i t i ./ j lj /: a l !/ !/ R .i 11j-f

if. 1-i 1/!

I 1 i 1 3 p. f .i y j i I ! s.oo / /i / I.i ./. 1 i 4 4 i i /

i. '

i M -i! i i J .i i /: .:) i

1..- /..

I i I. .2 t / i u i_._ t /. t 1 o i l,j, ,,1 -/. 1 1 i i j '" ". J f. /- + = / RELIEF VALVE OPENING TIME T. a i / I !E! l / ~/:/ ' ./ 3 SEC. ] -f-. i, f !/; T W~j,#* ~ .l'. / / 1 / i.5 sEC. _i 0 i e y i /.:/i/ / I i 1 } i se I 1 my { {

i' i

l

  • s 2

^ ys !^ i 1 - :{ = EFFECT OF RCS TEMPERATURE ON @h r i PRESSURE OVERSHOOT 1 i l I '.I j ...---lHITI AL RCS PRESSURE = 300 PSIG 3 h j j, _ :! r i -RCS/SC AT = 50 F l j .i -RCP SU IN 1 LOOP-j y -P.Ei.lEF VALVE SETP0lNT = 350 PSIG l .1

p i

I i .i i. i- .i i b l i I 1 1 i t 1 -i !-n I %I

l 40 I lA-I

.its = l .p. r j 'P -PSETPolNT' PSI l I I, i MAX l l } l g i l .f. f: l, f. i-ff: { j i-2B t

) "l l 1 i l . Figure 25 ..q. _. a _. _.. r t i i l i i I i 2 _....p.._._.;_..... :. 1 1 i l I i l l .j j l RCS VOLUME, CO. FT. 2-gy, 1 i i 1 a l... i 8 8 l i 8 m-S-C .S- .I y ~q ~2 i 7-i .i .j. / jf N,# _! /. /_i /. f /fi 4 + / l/ 5 i . /i if,f -j: ~~~" T -~ l ~ 3.f i .i i ~ / (. RELIEF VALVE OPENING TIME - .) f.J..[ f j./ . q... .j.. i I!../

l.- / f-
i..

id. 3 SEC. g: aj j. a 'j t 1.y M aa .!f i bi. 1.5 SEC. !!E /4# ~I g i i !. / if- /i/ _j g: -i-ti- ./i /. y. i. + i 4 l i t. t ......]... I l i 2 /.r /4 l iO l #4 ~. ' /../;. y. :1. . i.. i j i m f i/ j. /! /; l .i l ) .i .j:. '

F
j:

i .j. j. i. i 1 .1.... 3 i. i gy, g .s. I w

I=

..,EFFECT OF RCS TEMPERATURE ON x-1 j

l j!-
j PRESSURE OVERSHOOT j--

j-i j .-lHITIAL RCS PRESSURE = 300 PSIG i i . t :- .i

. t T-RCS/5G AT = 50*F P

_ 3 -RCP SU IN 1 LOOP'- n 't I

8-1

?

t. :

-REllEF VALVE SETP0 INT = 400 PSIC-l. 2-

l:

- ll h .l .i l-

i l

t 9 t l: - l t l

{t-

.l-1 -l t i t-t 1 1-

i :

= l

o :l --
1 O
50

/b>il: .i/_diD =ll: il- !}! ' ~ i

l:

.. MA,X S, ETP0lHT. ': PS I r l' p .p r .g. I l 1 j } E -i J--! -lI

ii

!l: i ii-

l:
i

-i! 29

i a: 122303 ~6~D0 1 Figure 2 - --j - - i i i l l i I i l i t i ) . 3...._ ....l......._.__... i RCS VOLUME, CU. FT. .Ito j i j i = .; I E i 8 i 8. _ _ _. .o t l i 3 3-c S-~- i i . _t

g p i,

/ /:.. .... g _/.. _ i i I .- l-l Il 1 _.a i l i ! !/i o i y . jJ _ 1_._ _. l .14e .l. /- -/l l_ q--- j .f .y. i i '1 i i / /! l/! !Z . _. '. i I. i / If i i i i l T iF ..I // /i id}._. ' (E.: l 'l[ '/ l RELIEF VALVE OPENING TIME. i f t' // V. / l ~ E, ' .I J 3 SEC. / j /, / s l e ' 'g

  1. 'l I

D 1.5 SEC. i ac- /j .i T. i ): i ~ f /, i 3 si i I 8 "j l 2 ze 1 t l l l t Eh, ~ i. -i i-I, i l j j t i 5 0 l N

'I EFFECT OF RCS TEMPERATURE ON PRESSURE OVERSHOOT
i l

i, g l

-lHITIAL RCS PRESSURE = 300 PSIG _

W i e, . A CS/SC AT = 50*r R x l lT -RCP SU IN I LOOP-H i l -RELIEF VALVE SETP0lNT = 500 PSIC-i 1 i i l j, i,i j i i 7 l .! :4 i i:4p i fp. i120

/49 1

i l -i j l i i l l 1 P -PSETP0lNT' PSI 1 I i i KAX i l l l 1 l l l l i i i i i i I i l 30 t L.

NC 1223 03-00 INSTRUCTIONAL GUIDE FOR OVERSHOOT DETERMINATION ll. A. General The bounding envelope of LOFTRAN RCS Heat input overpressurization generic results presented in Section I are not generally applicable to any specific plant of the W Owners Group on RCS Overpressuriza-tion. To determine a specific relief valve setpoint, a means of interpolating the setpoint overshoot from the generic envelope is required. Depending on the parameters to be interpolated and the correlation envelope available, separate procedures are required to perform the interpolation. t These procedures, similar in format except for the interpolated parameters and figure classification utilized, are developed for I six typical heat input examples, listed below. Parameters to be Figure Classification Interpolated Within Defining Generic Exampig Generic Data Envelope Envelope Correlations 1 Relief Valve Opening Time / (PMAX *** SETPOINT)* VS* Relief Valve Setpoint Valve Opening Time 2 Relief Valve Opening Time / (P VS* HAX SETP0lNT RGS Volume Valve Opening Time

  • Setpoint overshoot 31

I %L 3 Relief Valve Setpoint/ (P V8* VS* MAX SETPOINT RCS Volume Relief Valve Setpoint 4 UA(SG Heat Transfer Area)/ (P VS* MAX SETPOINT RCS Vol0me Normalized UA 5 UA(SG Heat Transfer Area)/ (P vs. P vs. MAX SETPOINT Relief Valve Opening Time Normalized UA 6 UA(SG Heat Transfer Area)/ (P VS* vs. MAX SETP0lNT Relief Valve Setpoint Normalized UA i l f 6 32

WC 1223 03-00 t al l B. Procedures .I The procedures developed for the determination of setpoint over-shoot are described below for six examples in which specific, l-typical operating plant parameters are used for interpolation l within the operating plant generic data envelope. The results

l of the sequential appilcation of each step in the procedure to i

these parameters is noted.

l t

i \\ ') lI El y.. 33 w m

l ( pC 1223 03 00' C. Illustrative Examples 1. ILLUSTRATIVE EXAMPLE 1: DETERMINATION OF SETPOINT OVERSHOOT GIVEN RELIEF VALVE SETPOINT AND RELIEF VALVE ~ OPENING TIME WITHIN GENERIC ENVELOPE. To determine setpoint overshoot for a specific relief valve setpoint (S) 'and relief valve oper ng time (at) within the generic envelope, the following interpolation procedure and Figures 1 and 3 of Section lA are used. ( l O P 34 l-

PARAMETERS FOR HEAT INPUT EXAMPLE 1 Initial RCS Pressure 300 psig 2 SG Heat Transfer Area 58,000 ft RCS Volume, V 6,000 cu.ft. RCS Initial RCS Temperature, T 250 F RCS RCS/SG AT 50 F I Relief Valve Opening Time, at 2 sec. Relief Valve Setpoint, S 375 psig Step Procedure Example Application i Using Figures C1 and C2 For T

250 F and at

RCS (V = 6000 ft3), determine RCS 2 seconds, AP350 - 55.5 psi the setpoint overshoots AP 350 (Figure Cl) and AP = 400 and AP with valve 4 75.5 psi (Figure C2) opening ime (at) equal to 2 seconds and for the Initial RCS temperature (TRCS}' 2 For the desired relief valve ForS=375psig) (V = 6000 ft setpoint, linearly interpolate RCS the setpoint overshoot, AP 375' T = 250 F and RCS from AP350 "" A'400 ""9 at = 2 seconds, the relationship: AP = 55.5 AP375 " O'350 ,375-350 (75.5 - 55.5) + S-350 50 350) 400-350 (3p400 _ 3p = 65.5 psi 35

lyg ,1223 03r00. "q" !.. l f)p ; L [: ._ _. i. - __; "l Figure C1 a._ I. .!_n-.:!:

1:

1:-

a..

EFFECT OF RELIEF VALVE .f. OPENING TIME ON RCS --l: ...l.: {- !N:.. 1 PRESSURE OVERSHOOT EE i' -- !!!...=if :lr'-!!"i a - ! "-- Eil! ij: -l m T : E.. [.".t ".. h :.. = .T..... RCS PU.'iP STARTUP IN 1 LOOP .T.' '. [ 7 .;: =;. 7.:: LillEAR RELIEF VALVE iiHi 'ti ' f g.:...u. t-VALVE DELAY = 202 0F OPEN!:lG TiltE .u. . 1. u .I .l.~..,[ IlllTIAL RCS PRESSURE = 300 PSIG

l: :,. :.l..

.J .... p_... : r =.. : -i n ::: c.: RCS/SG AT = 50% 2" i Filr- =in.]Ei"::ji.=.i SG liEAT TRAtlSFER AREA = 58,000 FT ._.a RCS VOLUTE = 6,000 CU.FT. .:r.._-: ...,.. d : : x x x. -.- =l:

_1:

u : -- n I-i il:n. r 'I"... ._.._,_,....". =. 4 ,.. i.

r-t :---

p-r =.i;lj 2.. .i. ul'n!9 ~ ' _9 P.~ 2.i2 79;i:il'.d.iiE-.... _ _. iii-ii EiiiElil-iiniijill!! El= . _ =.,.... _... x. _.j.._ _... l...... _ _ j =........ =..t.=._ :.- - ...l._,.. _ =_.... = = d....... j. _.,... :...=. n..... n :: =. =.: r... r... 2 n-. ] =.j_::: --t..r.. lx. - -- ..._=_...=.:- 8 ~5EE P.d5lE=- .li =#il.E'55~l':#ifR "i5 :li i"~=;i=h =lE i:iEli-+ ;FT H 1!:-!=4 0 ^ RELIEF VALVE SETP0 lilt = 350 PSIG. =J _,[. ~

==l==: . =n.2 - ---,dn=_=l:.....I : ..n =t. 22 2 i. = - a r.- -t-z = c=t__.__ .r e mr !!i*i-i: 52i~;E

i.-i'i_ ----- - l__E.T ill-l1.DC Zli'Elli2ii.il!LiiiEi~l~ !.iiih. IlC "C iiii_i9E: ~i-r

....."._.=_._.t.=..._..'._.._... __ _.._f'n_..._ h_.r._I =..g _ ~. -d.r..- _.4_. . _.. ] .. _.g._.. _;.p r... _.. _ - - --. :-.. =.. j.

t. _r_ f.:........

.n.. '.1_..j__._._. ... _ _ _ n :- nxirr =:. :--" - 1 n an u t= := L u... 1. .... :b. =- =- 1 r - n '=: n. u.= =J.;;;; r1== _:: n ur . = -. t- - - t - - " - t_- '- t ~ - - - .._-t r- = :a.-=r.- - rr - - j :: -- = : t "--* - - -- :=12 2 m = x t r.....

=

un_=._nn =. .c=

-...'_..._=lL......

r - :-t- =........_ p= : - nt t:"- - - "

== ~= _---- : r n=1. --- - ".4._..n r }=. :_. = ::_._ (x = -l..... {'...tu n.

J

-- ~.= ; : = = un _j =I= 1 =:: =.: = "" t --"--- . ' - "=. =. ; =t='...____.c---- _ _ _ __. r._. _4 = r--t r-t-- - - - = =.j r _ ____a_. _._=_.....r. ..1... - :l.:._2. =..' _.j _. _...._..._._..p=..._..}._..._.__.....~.c_._ =..._r=_._ =_. j _n. =..r... r

==.....t. __.a._-_.:, n_. ~ "..:~...... ..i. [ ....4~" ... ; __. i

== :: =n 1 -- ------- _J :n; x {r.=.. g. ey .r :24. = =..j u....n. _.: l 7 : = t "M- _ _ __in - :t u= :2.u=_ :: 1 e = t _. 1, - ~ ~ - - + .;.,. m .._ __I_ _.. _ u _. 3._;.,. ; ;; _ g ;.; _j. .__;__.__...__,....._q..._.2-.r-r =,= = = l,,, ., _ _ _,i r r. __... __. : - - - T -~;- --f__ =iiii :- '.~i :

  • I

.OE__'._=..ir PC =Fr==i,E_E.i_2'._:jE_i.~- :i ' .a. ..AE_E...2-j=7 j - _i.j . 22_ 2. l =c o =. =_. 1..._..__1...- . _1_ __.._...j =__ _.:. g [ !. _..... L. c. .. _._=..t.... 9. _ :..... _. 2. -l y.: . =._..= = =... _._._... 4 ..i p _ = c. = n u-[== -- r n = 2 - g i_ 3 4 n= ... _..l. ....=..'._......{.=...:.=._., q .=._.1_.__.. w. 9 r

m.,.,.,.

m _..,_,..ma.... g c= - i= := a-

i.. ~

2 t=n

== =i~==r=- l =.:= ;c=. l = =:} f-- .rY= -i, tr- --- = :;-- - e-:= = - - = s lb

c =i --- -

l x ru.g- "_. L - " " '-r= c ul-"E n.:- --1..;_. j...:.:.-

.;:.= L m:=l-- =..-

E .,.. = : nn;= I ur. +:)

== tm =- I% =r.. ...... /- =t-- ..:= ,, g _=___= _. g ;.j. J_. l2 = !r: a. _-..[-_..._... .}. .7 3 7; : - :! r.. p;-- l-- . n- =_. 1.__...l........ f"; .. r_-. _. t...r : g .}" _].. =...=. _r.}n. u..n. _ - ..s.. IG =.." ..._..._f. g . \\gO ......a.. .. e e ... g 3.._.... ..l...... g.,., ;/ =..,,f=,. g =. _ _. _ =.;;3 ...}=..;_.=... j., _ p jg ,..g. Yf h !!! 3" ! 32' = i ...:l:... - - " - l.r ...:_- / 'g.

j.

.. } : .a: n_. j ......../ 9 4 g .jp c.jj" ..l; f ; . F f. : .... ii T. = :. .:i. 4 - E:1: ,( t f. @ f 4 ,- " ! iip = li-i~i i j. / l.: u. / .1-i .I. l I . :-.I i i w --- i l ? I + l 1 o l i ), 3_ ! 1 3 l ~. .i i: I VALVE OPENI.NG TIME, SECONDS I:

lw

i 1

1 l

i' 1. .n - !l II

E.

iii i h" d-h I !I I 36 L

g Fi ure C2 ~~ EFFECT OF RELIEF VALVE . -......- i.. OPElllNG TIME Ott RCS .r .i. .t. . t... .t.. RCS PUMP STARTUP IN 1 LOOP. .LillEAR P.ELIEF VALVE

  • OF 0 EN'..NG li1E

.4.... V LV D. = r tillTIAL RCS FP. ESSURE = 300 PSIG - RCS/SG AT = 50 F -~ 2

x..

SG HEAT TRANSFER AP.EA = 58.000 FT -=_=.. :.:. *:.:. :.. .I.:... RCS VOLUtiE = 6,000 CU.FT. ...,......~._.. .........J,.,..... ._..a..__....... _........ ._..t... ..__..a...... ... _._.......r_..... .g ....g.._. . _ _..._.. RELI V \\. ......_._._._..._....._..._.._.__-.,-----2_r-.. SET OlllT = 10 0 IG

4. _._..........

s.. 12 o 2..,......._....._ _..._.... _. _._..._t_._ t ..._..t._..__... .t_..... ..t__._. .. _.q ..._.._.._.i__._......_._.t_____..__..__ _. _ ..._.. _.. _ _... _..._...__.r._-._. ....._.t..._... _...t._...._.... _... _........ _ y ....__.L._.___....___...._......_.._..... _ _ _. _ _. _. ....t_..._..... .. _ + ....t_._._. _ t. _ _._..._.._._. ...s._ __. _... _ _ _.,.. _ _. _ _......g ,.. _. _.. u..... _. ,- i .a. 0 m.._....._,__w.__...__,_m_ -__ m... .z..._.._ _J,_..!._..._._.._............... _. _.. ._._.... o... _.._t_.__....__.,._.6...._,....___.... j _.. _..$... N. .a .A _.t._._.... .... _ ~.. .. _. _....... _......_..__.4 w.. _.. ..._......_.....s .m ._~..T_...........i. . _. _..,._._....m_.. g _.m_.. ._..t __.._ r._ ___. _..._.J._._......... ._.__..__..f _.._..._._. _. _... .. I-. ._:t.._.. .._+._....... _... - - __.i.._.. g o./.. _ ....t...._._._.._...__.._. r .r.. r _2. .__2_..._..,._.__.s. ......._.L._._ ...i. ...t___._..._I._.__ _....a...__ . ~ _. _ _.... _ _. _ _.. _. ~. ... 0.'.:._.. .. r._. .._.t._._... .._....t___. ._.....r. ._.h._._...... ....t . _. r.. t.. _.. ..t....... e.. g m._- .m .t..... .._..t. r. i. _. i. _. _. .r a n l s .m I__$__. __..!. _ _. i l _.. :._. i 3.. l_ r l S g. T ,~ m I: VALVE OPENING TIME, SEC025 1. 1 ....i. w. i. 37 ~

4 30 1223 03-00 2. ILLUSTRATIVE EXAMPLE 2: DETERMINATION OF SETPOINT OVERSHOOT GIVEN RCS VOLUME AND RELIEF VALVE OPENING TIME WITHIN GENERIC ENVELOPE The following interpolation procedure is used to determine setpoint overshoot for a specified RCS volume (VRCS) and relief valve opening time (d.t) within the generic envelope. By way of i l lus tra tion, the following example heat input parameters, utilizing Figures 3 and 4 of Section I.A are used: 't PARAMETERS FOR HEAT INPUT EXAMPLE 2 Initial RCS Pressure 300 psig 2 [ SG Heat Transfer Area 58,000 ft RCS Volume, V 10,000 cu.ft. RCS Initial RCS Temperature, T 250 F RCS RCS/SG21T 50 F Relief Valve Setpoint, S 400 psig Relief Valve Opening Time, /it 2 sec. l F i l l 38

) Step Procedure Example Appilcation 50% and i Using Figures C3 and C4 For T = RCS (S = 4')0 psig), determine the ._t = 2 seconds, setpoint overshootscP6K "" /1'6K = 75.5 psi J.P with valve opening time 13K (Figure C3) andl.P = (it) equal to 2 seconds and g3g 57.5 psi (Figure C4). for the initial RCS temperature (TRCS)* 2 For the desired RCS volume, For V 10,000 cu.ft. RCS linearly Interpol, ate the set-(S = 400 psig) point ove rshoot, /._P 10K' T = 2500F arid.i.t = 2 seconds, RCS iP and.P using the 6K 13K relationship: 3P10K " 6K .lP = 75.5 V - 6000 _ _10,000 - 6000 (75.5 - 57.5) RCS LP ~ ~ 13,000 - 6,000 6K 13K = 65.2 psi 39

.y.. 122.b.... 0. 3 OQ.. Figure C3 +. EFFECT OF RELIEF VALVE ...P. T. ~ OPEllit;G TIME O!I RCS . l.- i. !E... ii::. PRESSURE OVERSliOOT .1_4 a

= '-...

1 l. !- RCS PULP STARTUP !!1 1 LOOP ... 1 ...l:....

t: -

.LillEAR RELIEF VALVE =: ?r- - VALVE Di' LAY = 203 0F OPEN!NG TiltE

n...:._::r.

. l....

4::t=. :

=_.. :.. - lillTIAL RCS PRESSURE = 300 PSIG ^ ...r._.. .... _ _........ m... - RCS/SG t.T = 500F - - "g. j - -. .o 3 - SG HEAT TRA!;SFER AREA = 50.000 FT ...: t:.: t

3. _.... ]

I::. - =.: - RCS VOLUriE = 6.000 CU.FT. ....t... .........~............... _.. _... ..r. ...__:_....,.._t_........ _. 4,_.._...,. ....t.._ . RELIEF VAlt.E SETP0 lilt = 100 PSIG _. _..........t_.. --. - - - -- t.. _ t:.. _ . i ....._m. .. m. 4.. 20 _. _ _ - __ _ r _......_.. _ o ._._.a._._._..........._...._..l... ..._.._._...q_ c,v,,

t. _._..

.. _.. _....4.__. ........._.( r_4 T _.._. _.. _ -_......._................i _ _........... _....t._..._._. _.._.._._.., _..__ __ _ m. _._..._._. _._...... 1... __........._..7..._..-__. ._.__ _....._r.__..._... _ _.. ._. _..t __._. _.. _. t. _..... t. __... :._. .._..g.__._.t.__...,____....... _. _ _,... _. t________.. _ _ _. .g _..._. __ u._. __ 4 ..i... ..._..._.._._5._ 1__.. ..___._........i.__. .m ....+.. _. _.......~ _ _ _.. _. c. .p..__....__..__._.._...,..__ 9.. m. g.. .0 _ - - ....._....N. Z. ...._._.....q..._4..._....). .g _l,_.._.l._................ _ ... %id. mi_ ..v .._.4__ . A........ O _.._.....i....... 6 ....4_...._ J , _ s. 1. _. _.. _ - -...... _.. _..... _... g _- e ........}......__....a M__...._........_ _. _..... _.. a.... LaJ .4._ 4 "N _m_._ _ ! _........,.l....... -., ..,i._ ... g, ....... -.__.g..._........... 4 . f l g . _.. _~ _.... ... Lp ...... _ _.,............__....._.._._...7......_.... _.. .T_-_...-.. a,. t__. _.... _.......)_.._. .__..__......_..._..a o. U O . e... .q. f -L B .s ..4...._.....__ ...r ..,. l me e ..e. g ..r.......% .......I __ b.__. ...l.... ..... _,......l . f j... _.... O e. _...s....._....... 1.. .e .e y s.. w .0..- . t t_.... .. _ _. _..,i._.......- ..........4..... a ...... _ *I. _....... _. g ....._g _.........g .....,..9._. . [....... ...._._.._.y ... } .j. ...g............. _, 4 .s. 6. s. ,...e.. i...e g. . m. .9..... q .........I.. .e. .9... .......e e. e .e. .. t... ....I . l ..t I.

s..

..t r i i-o- .l i y .t. .I _O_ t. val.VE OPENI G TIME, SEC005 1 _. _ i. .l. .] .h... _.. _.. _... ..s.... +. ..a. i.

.i .. j .6 .s.. Figure C4 .... s. .t EFFECT OF RELIEF VALVE r.. OPENING TIME fl RCS PRESSUR ,, y.,....,, l., ,e LvUr ,m n..M,r, ,n,a L rU a i r. iUr s LillEAR RELIE V LV ._.t.... VALVE DE AY = 20 0F OPElllflG TIME I!1lTIAL RCS PP. ESSURE = 300 PSIG o 2 RCS VOLUtiE = 13000 CU. FT. t... .___ _.........i....._........_.. ... :.... t. ..__.._._.._._._._t_._.. = . _...__. _.._. 3.......... EF AV S OIN .____3 __.._._ _._. _,......_. _. _.. ......_....__...t...._...__.........._....._.. _ .._...._...._..t......... i._. _.._._..r_._.___ _ ___t,.._ ._e.., _.... _.. _. _. _. ._.._.4_._ ..._..._._...t_.___ ..___.___._._.,.00..- _. _... _._.. _ _ _.._._.._.4_.._....._..._._..._.2._.._. _ _ _ _ _.. _. _..._._.._._.t_.___..._._... ._........_._._.t_ ../.__,___._._........_..._ _,. _................ _ ._.. _... _....i....._._ r__=.. _.._._. Y ....._..___..... _..... _ _.._. _. _ _. ~ _ _ _. _.._.i_.. ..,... 1._.. n ...3. .__a.._.. ._._t__... m, g _ (

r....

.. _ _., _... _. _ _....z.._...... C... a. p.-. w ._n___ m . _.4 ...._ i a. A. .._ f. -....._-_.t._.__._....._ _ r_.. ._e ...0.. . _.. _.. _. _._..._..a..... s,, .... _......._...t_-....... _... _. _. ........1...... t __ ...t..... \\0 ..t.._. ......._.. t.. .... f.. .2. q ( i m ._...t,... .......t. i ..t.. t ... j.. ..o yx s. >l I ,1 I I a w I.. l t _.__.0..___.. . t, i f i

val.VE OPENING TIME, SECONDS

.N:..:

ii
ii g

.I. g .g .g.. t q

30 1223 03-00 i ' ETERM I NAT I ON 3 ILLUSTRATIVE EXAMPLE 3: J 0F SETPOINT OVERSHOOT GIVEN RELIEF VALVE SETPOINT AND RCS VOLUME WITHIN GENERIC ENVELOPE The following interpolative procedure is used to deterr.ine setpoint overshoot for a given relief valve setpoint(s) and RCS volume (VRCS) within the generic envelope. By way of Illustration, the following example heat input parameters, utilizing Figure 9 of Section I A are specified: I PARAMETERS FOR HEAT INPUT EXAMPLE 3 Initial RCS Pressure 300 psig 2 SG Heat Transfer Area 58,000 ft RCS Volume, V RCS Initial RCS Temperature, T 50 % RCS RCS/SGAT 50 F Relief Valve 0 ocint, S 375 psig Relief Valve Opening Time, At 3 sec. e 42

4 Step Procedure Example Application 1 For relief valve setpoint(s) For T = 250 F, RCS equal to 375 psig ( t.= 3 p , joj,3 p,; seconds), determine the setpoint 6K fr and P = 78.5 psi overshoots P6K ""d 13K 13K the initial RCS temperature from Figure C5. (TRCS}* 2 For the desired RCS volume, For VRCS " lir:early interpolate the ( t = 3 seconds), and setpoint overshoot, P RCS " ' 10K' T from P6K *" 13K "" 8 the relationship: P 10K "- 6K ~ ~ Y 0 , 10,000 - 6,000 (101.3 - 78.5) RCS 13K) 7000 13,000 - 6,000 ( p6K p = 88.3 psi I 33 6

.a T-i ].. 4 ::. l .}. J:.. g3pgSVOLUE.CU.FT. g

1. :

( }]Q }- /49 .e ' 6000 t. . : y-i . -l 1'

i:

EFFECT OF RELIEF VALVE SETF0lliT. ~ ON PRESSURE OVERS!iOOT .l 5'- "l 5 . !!i~~ i i . r __t-i.i n . r -- - ~. E -.j r . -i::-.l: i i: a +!::: .-I-

.
1 i

-.j-g - - ].- :1

f. n t:

. u! ;.' .l. j. ..t.- 7:::.l: . l _.. ;..... .i -i 4

r-;

j;

i.

'. h.... iii].3:lj.iijimi:_ i: j..:i:. ..ii. - :j : q]- ~ i.;:1.'l j -i. 2: i ... :EF !!i .iHIE :"H = : E:!'.T =E}...... i: ? = : n-c "itir Ia l...... f. ',t!_ .gij 2 := l (} '" n.] i Sil

cp
yj;;l{..iii

[...: ijijd.:. t /20 .3 ...:: = li-fif..c2 ib lixii E ci--innhi ~ -ec.i.. - Ed"i,t p.13000 . l..: :_ :

r.. u.n ---

. l. u 4..,..... l .1.- _. J.r..u: .d.

.j =._4

..t.. n - x . l. _- - .. :. = N_. U~ .!.I lik: 2 ": 3 ;T i ~.[. '

-d7 4

i;t = = t iW/.:3 _"d=_# E %f d f hii=mq = 142= 105.ir134.-iT== -i~==i 100 )__ _ _...... ..,... _. 5) .....l........!'..I.... . n.. f =.__ _....-....._,_. :. q. =. _ijn._r._. w .: =_. :.n__. _. m...i.. t. c - 7.._.=__.- .:{.. l.. ..r.. . _1.. _ 1. r .a ......n_f_7 _= . l : i:L..: t.---r_ n. '=. _1_ _-. _.: - 3.... I. n....... =_. 1- -.. ....d........b c :r.I =._... ...-..I............_.. __._..._.:.. ...=.U-. .""._.....J, ..M

lr

l.:-.. - ....L... .t . l . g. 1 t .cJ.:.../. /.:.:.. c ra n';.:_:..;;l.=J=in.._ ; - :i==;...q =._.. /.. I

=-d / :

. :n..r. L.....: ~~.p.;.:1.- u=

inu:n :t x::= n:2u

=. _:.; mt -~ - t E -iF 21 E;. ]h;:fcjj=hgpiliiEF =EiE=_EiEj'EIij rE-ijEj:liidi$r. :. i=_i:.2.;l - o -go

  1. j73g v..... j=.... _. J_ _.:i.ad. ; g..E.. l:.l.i..si. 2...i: i:

E._i.=..r..=.. _ '. _ = _.:~._._.. u.. !.. 3. ~._i_if...._. n l -.li. ".u !n-86:Jl"'l5EM t.2:i;l5-MEN 5I:l5i-E ::~.5N5 5! nM525bP U"E#'} d =... :_ j =.__ : f.. _ / t.,.: :b. 22. :=... =.: =.. = p=.2 0

t_=na: urn.c

_ l- = : =_ '..=:j s f . : = =_... / Tut, '.. =." *.

=t = ' L*:u.iu'==:

2. -- - = c =..[. .....!....-..-I ...g:._... ...__.=._ n.. n._:.

u : =. =.._:.=_

a n =....p. _. - .r ; : . =.:n -..n = r:. , =:: _"55M liIfE:!; 5!5l!b lFrb li !:. !b i::N NIE-! h # I k = d!"i E_l S i: g. _ r = :=l.. n_.t. u _ b__.. :..z......*. .u.. i n..... =..r _r... ....... r.. _=_. .n_=_. .:. : r:. - r..tn t: 5]i " IEN- -!I5 "7} 1:Yr:15lN l - RCS PUP.P STARTUP IN 1 LOOP !NE t =F2.N-....._. ,t ....h. ? r:- 3 SEC. RELIEF VALVE OPENING 'i ' i * ~.i.!1. = 9 ur-

".l.

... # _ ~... :.;. ..:_: _._ l=a..... x j 3 .. 2 = J

=-
c
n
=..:. r --
=t INITIM. PRESSURE = 300 PSIG 1

o.- _.. lt. n..=q . - } =v -. l 9 . a :_. .j... - RCS/SG AT = 503f a -~ -32 -3'Z g' -j - 3i - !-i;

3 'i;:'

G ...N: "-. ::

I T

INITIAL RCS TEMPERATURE = 2500F 0 4 J.~.

l:

.r it-i 2 y os. j: 20- =.. .l SG HEAT TRANSFER AREA = 58,000FT +.

. r,

== g. g .g -g: .{...

l-

.l:

lj.
l:

ji- {.

i.

- h -l Z C. { -l l h h h

i-

[ I: .] .c .p ... q : L. 3_ i e 4 _.i. I r.15s ;_jg i 4eo i . 4So ! ~ She i i j l j

j. l

[ i j

l: ]

l i i i I 1, 7 SETP0 INT. PSIG .,l' l i I, ' } 8-( l f g .l 'f. ^l. l~ . j '- ._.;,. a 'j li. e ~-- 5_. l. .1.. 3.p

'l:..
l. -

.l.

1 j

...l.... g. 44

O 30 1223 03-00 4. ILLUSTRATIVE EXAMPLE 4: DETERMINATION OF SETPOINT OVERSHOOT GIVEN SG TUBE HEAT TRANSFER AREA AND RCS VOLUME WITHIN GENERIC ENVELOPE 2 For SG tube heat transfer area different from 58,000 f t the determination of setpoint overshoot is made using a slightly modified version of the Heat Input Instructional Guide for Setpoint/ Overshoot Determination prescribed in Chapter 4 of the July IS77 Report (Reference 1) and Figures 12 through 23 of Section I A (figures depicting setpoint overshoot variation with normalized steam generator UA). Setpoint 4 overshoots may be obtained for 1.5 sec and 3 sec relief valve opening ti

c. ('.t); for relief valve setpoints (S) equal to 350 psig, 400 psig and 500 psig; and for RCS volumes (VRCS) equal to 6000 cu.ft. and 13,000 cu.ft.

Setpoint overshoot may also be obtained for t, S and VRCS **I"** within these envelopes, depending on the combination of Figures 12 through 23 of Section IA selected. Illustrative Example 4 and subsequent examples will 111ustrate this I interpolative procedure for interpolating t, S and V RCS' Illustration of the use of the modified interpolative procedure of Chapter 4 of Reference 1 is provided below for the determina-( tion of setpoint overshoot for a specified SG tube heat transfer 45

l area and RCS volume within the generic envelope. (Illustrative Example 4). Figures 12 and 13 of Section IA are used in the l procedure for the following example heat input parameters: PARAMETERS FOR HEAT INPUT EXAMPLE 4 I Initial RCS Pressure 300 psig SG Heat Transfer Area 29,000 ft2 RCS Volume, V 0,000 cu.ft. RCS Initial RCS Temperature, T 250 F RCS RCS/SG T 50 F Relief Valve Setpoint, S 350 psig f-Relief Valve Opening Time, t 3 sec. Applying the heat input procedure: Step Procedure Example Application i 3 1 For both the 6000 f t and For T = 250 F and S = 350 psig,- RCS 13,000 f t3 RCS volumes UA = 0.139 (Figure C6) (S = 350 psig), obtain the 6K reference normalized UA and UA = 0.222 W gure W. 13K E (UA and UAy3g) at the 6K initial RCS temperature (TRCS)and relief valve setpoint (S), using Figures C6 and C7 2 2 Determine what fraction, f, 29,000 ft /58,000 ft = 0.5 of-58,000 f t2 constitutes the actual steam generator heat transfer area. 46

g,_-i i, gC 1223r 03.-00. Figure ce 1 i 4 I . ;i. i I EFFECT OF STEA!i GENEPATOR UA 0:1 ~..;.. ( PRE 55UN OVERSHOOT a e ..l.....__.. .-------2------- 0.'30 l _ ;.. :...j. _. _ .....p._... I I. \\ t l l I I l ___.._.a..... L l l

i. !

I .....q_..;..;..;_{ 4.... ; _ .q._...........:... ..._[. _. L... t i i l-I i 3o i ... %/. i 0 / i i s.._i.,. i e, g I o 1 ,/ l .l.__

._.. g

.... #. _ I . - _.. j. _..-_L.. 'O 9 1 I i ,s i i l '.. _ gy q ,l . f 1 ..._. _.:;_....}.. .... /. '...-. t g '....... W. j, i o g-n- ._ + .s._ /- r \\ s-l i.____.t,.._._; c: / 1 1 .,_ _ y t p. ._ i ..w. t c

i. -..

7_. i O. C l i r i j ( O... t.. w-w. N N 1 m .i..._.,. e 3 SEC. RELIEF VALVE OPENING TIME D

l f-r e

E' 'g ,.-..,.__-.i. 3 t N I N 'g . =. =, f f j .g j l H .. 7..p -,.m t t-i zw f_g .....:.. q,jg l .l j '-C 1 i i ?o l I ed ^ k L. b _b, I M.,__..-..l _. RCS PUP.P STARTUP ill 1 LOOP l I I f Z, RCS VOLUME = 6000 CU. FT. W - /b ]; n_..:j-__. 'x INITIAL PRESSUP.E = 300 PSIG 2 f RCS/SGAT=507 i ' _ 4 - RELIEF VALVE SETPOINT.= 350 PSIG ( 2 SG liEAT TRA'lSFER AREA = SB,000FT..__ / 1 ..... y.. .. : _ y...._ _ l a. i ._.o..__.. leo Loo 1, -- t i i.....!.l......-._: SETPOINT' pgg -- -p .p i i i MAX

p --k ,--p.._..._ Figure C7 --q; i I~ ~ "I'~~ EFFECT 0: SiE/sM fiEt: ERAT 0r. UA 0.1 q.. _ _ _ _. __. r-- - -- [,m,gt n,y,prm-i...._t f p . _.;.... j. ..p. + i i._ . g.p =... .a .... ~.. t o y .4* _1- -I f t l . I. ..t. I __....j..._ i i 1' _;_._ l t --../.. p -.. :. _. j......._ c._.;. _. :.__. L - f _....j I I. i -e .. 'l g o. c O U. o t co ' J --.4 _ @l12 - H[..._. t l ..f. / . _ __ _7. _..._. j. _ _.2.___.<:.____+_. l i. 2 i ...... u_u. .i. i .s [ c,2p -..__. u..._. 4 o / .t. 'o /. ..;~ j l O ..i. i i ~ j. __;_ s. i 3 l I I s':./ 8s i .e i __ :) ~_ ___.d J i L c7 i i I._o. = __. u.. _ _. ssa 3 SEC. RELIEF VAI.VE OPENING TIME

i. y

.q -___.t.: j. u I_2._. i-s i a ~ ~ J. c: :....__. . _ _:..i. l' ..t. ..._w. l .I o u i I l I 2; g.. '_.__..?.. l~ . l / L. i

g. _ a....

g b .I~ -p - .!._:___ p:. ' o,lo _. L._:_u. ._ _...__i t __..____...u....._- _t y t -- - RCS PUNP STARTU? IN 1 LOOP ...- - RCS VOLUI'.E = 13000 CU. FT. -j l .l i-l. - JHITIAL PRESSUP.E = 300 PSIG ~ .i -l + - - ../, 2_. - :. -F"-,- - RCS/SG AT = 50*F i I e i i ~ - RELIEF VALVE SETPOINT = 350 PSIG i

1 -

"~~ - SG llEAT TP.taSFEtt AREA = 58,000FT 7 2 i ~ ~t 1 i i t t t, i. I, l e e l i o i too

    • o o--

i

3. --

r

i. -

MAX SETPOINT' PSI - - - t j ":-- -- - "---} .g___:._.._'.. i P P j ] Is8 f 3' l

NC 1223 03-00 1 Step Procedure Example Application 3 Multlply both UA6K y3g UA'6K = 0.139

  • 0.5 = 0.0695 and '

and UA (from Step 1) by f (f rom Step UA'13K = 0.222

  • 0.5 - 0.111 1h-
2) to obtain new normalized UA'6K and UA'13K values.

1 4 For the same isotherm, T From Figure Ck, forJ7 = 250 F,

RCS, RCS 0.0695, and for UA'6K and UA'13K, S,= 350 psig and UA'6K

= obtain new setpoint overshoots P'6K =5 psi. m igure C9 P and P'13K frT = 250 F, S = 350 psig 6K 3 RCS ft and 13,000 ft volumes' from Figures C8 and C9 and UA'13K = 0.111, P'13K = 31 psi. / Fori he actual volume, V For V = 10,000 cu.ft., 5 t

RCS, RCS linearly interpolate the set-P'6K = 50 psi and P'33 = 31 psi, point overshoot, P'yg g, for the new steam generator UA from the relationship:

P'VRCS " 6K P ' 10K " 50 4 6000 i V s RCS (,p,6h .P 3K 10,000 - 6000 ('50 - 31) E-999 7000 I, b 39.2 psi -v' = / 3 ? '\\ ,t , Y f E k N i. l . il t .) .) 53 t 3 b / 5

+ r-- - r-i 1 . i,.... ; Figure C8 I, :-. l EFFECT OF STEAM GENERATOR UA ON i I _.... ;. _ _.. i.. . i. PRESSURE OVERSHOOT ._;._......_.._...._...j ..._g_..... .i a e t '4 s I e 4 .L._g,$p I j l t .y... i .l. t I l l l f 'l r l 4 i m . _.... _l _.. _.; 2_. i i' i t _i ,l. - 8 1 i f i i . ;... [ 1 -. I . 4i:-.._ .. 1 .._. g.._.... l -l: l i o i \\ [. _. '{';.. I I 6 J:_ _L l /...._. _' I I ,r. ,. i. -}- g .l' .. i _] I e o t,f O I ] So _._.J.. l r f l .y l ./ i r 7 _:.L e,aa i, :: - ]..l,_ __. i.; . _..,/. ,p t).., n s .._ w 7.._._ =. ; D i. f .__/,f l-I Y f ' j '.

6.. '

,/ :i l j. ~ t tu - - <[ - ^1-- l .c j ' a -- --l- -- ! a. i. i 1 i.. - O. O. s' .[! l 7'.-- ; l ' l l D* i i .- u.s. w... a -l j. .p. i f l . l' i N a. -.:__ _. - - - s.. u-

l 3'5EC. RELIEF VALVE OPENING TIME 5

.U. '1; = a: _ l. o. - -. + ~~.. f. $ g C -(--.. a .t i .n. x u-p. ._q a o, / />,. _.. i i i

i. r.,-

r . :: /.,4.f j 1 l ..l

s.. y1n

,...... _ __ p..' l i; . r / " . 1.. i [ - :,f - /- [n./ /: i j I i i / - /I d-i i j i /.

i: 'l:

RCS*. PUMP STARTUP IN 1 LOOP .d. :_

j. 2;t.!

W. t. [ . r ' tg J-RCS VOLUME = 6000 CU. FT. _r /t

(

//' l INITIAL PRESSUP.E = 300 PSIG -.:4 - _ I-l-J RCS/SGAT=507 ]i J I IV E u ;, _j.._:- REl.1EF VALVE SETPOINT.= 350 PSIG [g. i .i, p 't l E I !~ SG liEAT TRANSFER AREA = 58,000FT 2-a l o -/- _S.-. _ __. _:. l __...... I o '; t i g w lee l See i ,/ o I i l 1 e i .i l s. 4 a .__.: __q. ' I...P -P / MAX SETPOINT' PSI _.i._. _ l p 3 - l t i e i 50 ,im

Figure C9 l cacc1 c. sTu.n on..:nda udC 1: 223+03"00 t i - r - -- - r,ntsr.unt e s s e T j I l___._:_...._._.. 8 i .i..... I__...__. ' 4,3o .__L c. + = l 1 . __ _ _ 7 .. ;.:. __J_. ... 1. _... L.. ___ ._..... _ j ;..... y. _. [. ._4._._. 2.. _ _. l i l l ^' I t i + .l. , ' j o 'I ....':=. ' ) N o -3._.... _l .;. _t l 1 g .1

. _2 m

i i ) e i j j i .i I- ___i 1 i i i _f-o,20 - u. O O t' 1 ~ f- ) -o T. - ' t' ..i i I -j --- l ) j. e -(4 I I 1 w f -l ,j-- e e s: f gf 1 m 5

7.._._

_ _.i .o w I... w. p.: 3'SEC. RELIEF VALVE OPENING TIC L_ U - 0: ..__ c. 5 5 L; g_.___ _j .1__4, t .__.L_...+__.. .__1 __t _. Q ..l. i1 u y: z a-I '.. _.. {... _ 4..- ~ ! _a _ _ :_.. '. l { y ' "i ,, g p. -s .4_ e i l i y4

0,10 - ::- -

l .s,, i. .._..t..... p )M l - I sy - RCS PUMP STARTUP IN 1 LOOP 4- ] .r I- - RCS VOLUME = 13000 CU. FT. F-1.: ~l r y r j - INITIAL PRESSUP.E = 300 PSIG i= .I l-I- t .i - RCS/SG AT = 50*f. F-- a- . i.. ^ - RELIEF VALVE SETPOINT = 350 PSIG + i .... l._.._ ,t_. - SG !! EAT TPMSFER AREA = 58,000FT 2-- t. 1 .i t ....g.. n e O poo Soc - o .L. l I .... l

a - -; -.

l i t i I ( i I I ! p 2 '. _ ,8 .../_.. :... J. MAX SETPOINT' pgI -- h.. l-- p

A NC 1223 03-00 5 ILLUSTRATIVE EXAMPLE 5: JETERMINATION OF SETPOINT CVERSHOOT GIVEN SG TUBE HEAT TRANSFER AREA AND P.ELIEF VALVE OPENING TIME WITHIN GENERIC ENVELOPE. The interpolative procedure of Example 5 (modified procedure of Reference 1, Chapter 4) is applied below for the determination of setpoint overshoot for a specified SG tube heat transfer area and relief valve opening time within the generic envelope. Figures 12 and 18 of Section IA are used in the procedure for the following example heat input parameters: PARAMETERS FOR HEAT INPUT EXAMPLE 5 Initial RCS Pressure 300 psig SG Heat Transfer Area 29,000 ft RCS Volume, V 6,000 cu.ft. RCS Initial RCS Temperature, T 250 F RCS RCS/SG T 50 F Relief Valve Setpoint, S 350 psig Relief Valve Opening Time, t 2 sec. Applying the heat input procedure: O l' 52 L

4-Step Procedu re Example Application 1 For both the 3 second and For T = 250 F and S = 350 psig, RCS 1.5 second relief valve opening times, obtain.the 3 1.5 = 0.139 f rom Figures UA = UA reference normalized UA C10 and Cll. (V = 6000 cu.f t.) RCS (HA and UAI.5) f r the 3 i1.tial RCS temperature (1RCS) and reIIef valve setpoint (S), using Figures CIO and C11, 2 2 29,000 ft /58,000 ft = 0.5 2 Determine whgt fraction, f, ~ of 58,000 ft constitutes the actual steam generator heat transfer area. = 0.139

  • 0.5 UA3 " UA1.5 3

Multiply both UA3 ""d U^1.5 l (f rom step 1) by f (f rom = 0.0695_ Step 2) to obtain new normalizedUAjandUAI.5 valves. l i I I f 53 [

9 - - r ru!C-122 F] 0 BO . ~..l._y.. .j. [.' Figure C10 "} i l EFFECT OF STEAM GENERATOR UA ON i. i ._. x_. PRESSURE OVERSliOOT i }... t i i . a. -.3.- l I .... j.q. ;..._ -- n. _._ o,3, l i i l I 3 i ] l- ..f..;..!.. ...j. ! ._..l .l. _.d..!. .I.......!. l i. i .i i i .u . _. _. j. l l-i i -. _[_ :. _ _:... 4 . _:.., - #._ l._. l ..g.., r I t _. _ ',- l l _L_. j

t :

I i .._ _ 7 I .t i .~ _1 l l i I I-I M I I _L. l 84 1 1 . o. : __ - e l [ I l g,- ] i ,i _ _ L. t o i l 4... a..$. .I ,', / ' .i._... _ _ _.. a.'. o .I .). ..o l /: l l ,+ g ._ _ _.; g .j_ ) g,yg -

._. __ q_ _. /.

..._d. ~ .. gJ ! !. : _..l.. .y e i I ) ,l - i e /i_ i I + r s.a i i i l ... m l 1 M

..
_./,.

? i 1 - L_ u, I l I t i n. 1>*- I a l ~- n (- u. w i.. ii l.

l. _. a.

1 s ... _. :I /- l 3'SEC. RELIEF VALVE OPENING TIME . E. =c ~~ g ma -. a: - / = -' ~ i .. - Q ; , g, 7-j o me r. L... ...._ t 1-2: [ /.j/ l !: 'l U.= ..i. s. D. I I .}.

  • D

[e f _ ',... _i ['. .l .l. ...j.. ! _. 1 { T ..___..T .-I: t a r l 7 / \\ t t i I .se C

--e.to

.l ./;[ - -C . _ : _. f.. _ __ _. ' }. - ].: I d-Ij i U 'Li 'i- [l. l' i ..___.l-- ) .!h ' I.[, l-i ] - RCS PU;'P STARTUP in 1 LOOP .._. i l W./. ;. i .g -RCSVOLUFI=6000CU.FT. t 9 l w =I N__j_M ' I I_.._i_ - ]NITIAL PRESSURE = 300 PSIG .1 d - RCS/SG AT = 50*f ) - RELIEF VALVE SETPOINT.= 350 PSIG..._; l l.,F j-n =-_ 2 .i .c - SG HEAT TRANSFER AREA = 58,000FT l 1 n I. :- j i 1 -l o e a . {.._. K,oo.. i I l .. 0 \\ 10 0 g I f, i ~ P P i l HAX SETPOINT' PSI {.- l O

9 .,-r l i I Figure C11 l .._ i.

i... '. ',.. _. _,

..f. , EFFECT OF STEAM gel:ERATCP. UA ON l i i PRESSURE CFRSH".0T . _i.... _.i..!.....' .....I, I l i t l _. q

... g... _ a...... :

j .,..l j : 3 i .1,.._ ._.L ...t. q...L _.. p I l y I I e t- - t -- -- - l -l F --- O.30 g n. i l ..f. ..f..... p.]_.'.!.*.s..?...~.!__.... g l .?... ! ..~.. .l 3' ~l T-t' l I t l - l : - - l._. l l { .._...ggCY _ _.i / 1 J, - .1 -l l i 3 f -[. i.i.l. ... l 8 :ii-l , _.._.; _ ;!....; { ;; : ! l ~

  • l

.j. l . l. f 1. + 1 n.. l .i i. i

l j.

j:-.f f :f:* ' I

l.. _ *

...'....}:..l l .. s i r i 4 i .___.i I' : [. I 1 l l l 'lr . '. ;1; . _' :.c.. I - i- .. 4.._. i.. {.. i I i. u. 0,20 --S . I, T l . 't'. ! i-Od 'i-. _.. i f. l'

i.

i I. i a. i }. .- - ',,. [: LC. .I_

8 l....t.-'

i. f.. w

f..

.... cs: l: - 'l - 3.. I F-

  • C 3

s 1:

v. -

o l l 8 .I .? .I i i I o. W e g g g. i l I ~~ '$i ] h

j 1.5 SEC. REl.lEF VALVE OPENING TlHE I

... f ~' $../$7 i

=== b -mm- .i .. i 1 . e.o ... g... :__. _...... !..._I.. !, I: l.... [ j .--r----- .,l: I... o i.: = : e 4

~

, t _..... .4-1 4. .j. l I. 1 j I,.a 2.-

t. :..

i .i,.. ! j _..e.,

.:- t o.fo ll l.

._..._1.._. _.__g. i....- - RCS PU;'.P STARTUP IN 1 LOOP .i. .I l. RCS. VOLUME = 6000 CU. FT. ,I i 1 .-..l_. t i a INITIAL PRESSUP.E = 300 PSIG .I o l RCS/SGAT=50*f q -./ / i'...! RELIEF VALVE SETP0lllT.= 350 PSIG ...T

i:

i i t ? I ,U t __4. __. _[ 4_...., i...._, .._ _} l... SG HEAT TRN!SFER AREA = 58,000FT j l ,j. I ._ 7.. .:j- -l l l .. [.... :. ;.; 2 I l 1 i_ :. 8 I_ I .i... _.... . -.. q....... _y. l I. l l l 1 l i-n '.,i .. p, . !._.. /c. o ' I.. : 200;-.. i 8 4 .0 . ].._....,..i y ~i i t,' i i l i 3 SETP0lHT' _ PSI 'P -P !~ T MAX

i

.L.. ..y l i

i! q

. y... ib - '. l.

l.
. l - 551

,~

3C 1223 03-00 ( i Step Procedure Example Application 4 For the same isotherm, T From Figure C12, for TRCS "

RCS, and for UA and UA "5

psig and UA 5 3 j obtain new setpoint overshoots 0.0695, P = 50 psi. From 3 /;Pjand l.5 F1 C13, fu P f r the 3 second and 1.5 second relief valve opening times, using Figures RCS = 250 F, S = 350 psig T and UA)1.5 C12 and C13 ~ P = 25 psi 1.5 5 For the actual relief valve For, t = 2 seconds, opening time, t, linearly 1 p = 50 psi and interpolate the setpoint 3 overshoot, P1, for the pl*5 = 25 psi, new steam generator UA from the relationship: P P = 25 P = 1,5 + 2 - 1.5 (50 - 25) 3 - 1.5 t-1.5 + 3 - 1. 5 ( Pj - Pj.5 = 33.4 psi 56

..k i i-p Figure C12 . ;. _.... __ :._: L _.._.. j _.. 1 j.__j._ .q.i....Y p r t i.- EFFECT OF STEAM GENERATOR UA ON l l 2 [.._p_. J _..._.r_ _.c t_... PRESSURE OVERSHOOT s i i v --' _.;........[..:_ [..:..._ y l'. __ j_ y. 4._p_.. y } .i _ t a. l l I

o,u.

i _.. _.3 ..... _j !.I l ....{.'_.. _-li.. )!.._. l. r t.. l l i ( ~ ~_ _ .l -l .....f.. J. 1 l _ p ;.. -- .. b [' I.I . j; : j i j i .i

7..

.__.m..

  • 1 4

-l:. i .i-*.! r .l 4 t ./ J t .;~r: 1. I l.... ]'= '. t 1- --~ 6 3 l. -l Ct [ l'.h 1'.' 5/ I {~..I. T 3 ta. a=. ..o

  • );
f. - ~ -

+ -+- -

.1.=- !. ' '~

t t O + 1.- - ~ - . f., 4...... y ~.: L. [r lQ. -. 6 -[.

l - :. :1 l

1-

a. m

-L..$ /.' 9 j.' r t. i 'I : L .1,-.....,- ... L*J. t r-. . f. - 1 s.c,

s i *.

j i ? 1 .t !..__. [9-:. _.:..:_ j, _ __r --l.: Q i 8- -f ; t .l' E l. [ g f. .l;.. _ ~

3

_ :.. _ _.._.m., w._ f. ti 'l .i 't" [ 1 !: 0 f __...o, !.. I t

t. '.l '

I 1 f N, s .. : O.. _ (

.J..

. /. - 3' SEC. REllEF VALVE OPENING TlHE '1 i .a I_ i _ /.: .i .s g. o ..,:' j j. . a: l l~ f i: 'i.) . f /.. .; -l i-i a {. ; _...,1 .... _. _- lp.. ];

g..

r .- t i: l. ) t 9 g

  • .lo

... - l'.-.: ..r _.._ u. { i n

l:

s I W . ~i' 'l i i i l I i - I [._ i l b. .i - RCS PUMP STARTUP ill 1 LOOP .:~ ...j

.ggyg=,,._y

'~ i N I - RCS VOLUME = 6000 CU. FT. P __L... I I.I._.! -d 1 - INITIAt. PRESSURE = 300 PSIG

d.. - RCS/SG AT = 50*f a

~ )i... y _.... _. ___. y.. - RELIEF VALVE SETPOIllT.= 350 PSIG . _L_ e i 2 g. + .j.' - SG liEAT TRANSFER AREA = 58,000FT. [ . p-j.- i. i-4_ ___9.. _. _: 7_.._ j. :....;

. _q..

I I i e

t -

J a O I- ...Z. g I

l_..E_._;i..
ggj.

i. le, o g oo g g. ..l i .l. t i i ...T .i 1: il. I p pSETPOINT' p$g l' 1. - HAX j

l:

. i- - l I l 57

l.

];.

{

l: i.

8 poz.'nz_no .~,r g i ! _._4,._.. l._. 1....'.' .l. ._ j Figure C13 j _...j,,-. __ 1 .l-ETTECT OT STEAM gel'EMTOP. UA ON l j. ._.i _...._:.j. PP. ESSURE CVEi:5CT .i.. 8 i l i

.. q.

i .1 e I l i ..._'.i. 3, 30 i -r +- - "l - -- i l I 1 i v. 7__._ 8 g(pf p_. i i 4 _..L .h. -. : _... _. :

... l i _ :.: _ } _

' l, .l l l 9 o ..; jf,....._j...j.. _. q.... ; .,.. j. i.__r . L _....__ :. _ ; - - j.._ i i i i i j f j W g f a l .:t i ~]....... L - j j i... ... L _._ 2 l0.20 u. i i I --S-- l l I _ _.O 1 4 __..__ I i.:- I i ..' T s _ _. / -[ i

I l

i ~j .__..M.-. 3 .. s. r- - --- - i l. u-i m t. [ p i 1 i-i .i: .6 i o u ~~' $ ~. ..h i. : 1.5SEC.REl.lEFVAL.VEOPEtthilGTlHE j _. _ 5 j.. _ _... .l l.. .li ~ j .} _.j w , h; s -- _ __ a.. a: a: 4 .l j 4'I. I ', ._L_,!. i I _._5. s/' i i 3 t i ).- 'I j e y; 1 1 .o,fo _c. _g )g 2i . __L._: _____. j - - - RCS PUPP STARTUP Ill 1 LOOP 1 s i. - RCS VOLUP.E = 6000 CU. FT. -- - [ g ; --i - - INITIAL PRESSUP.E = 300 PSIG $. y4 %.. e: I g i ..) j "- ~-! - RELIEF VALVE SETPOINT.= 350 PSIG i -RCS/SGAT=507 -i

j 1--

.i - SG HEAT TRA!SFER AREA = 58,000FT2 .I v .;,I l:- 1. 1. 1 l 1 I 1 i -l l e j l .l-r t r i i l 1 i /00 i l ' 200 . 0. ___.i. _ _.. p 4._.._..._.. i i MAX SETP0lllT' p5g p i i T l i i i 58... - _.a. I

A gC 1223 03-00 i t 6. ILLUSTRATIVE EXAMPLE 6: DETERMINATION OF SETPOINT OVERSHOOT GIVEN SG TUBE HEAT TRANSFER AREA AND RELIEF VALVE SETPOINT WITHIN GENERIC ENVELOPE. The interpolative procedure of Example 6 (modified procedure of Reference 1, Chapter 4) is applied below for the determination of setpoint overshoot for a specified SG tube heat transfer area and re11ef valve setpoint within the generic envelope. Figures 12 and 14 of Section IA are used in the procedure for the following example heat input parameters: PARAMETERS FOR HEAT INPUT EXAMPLE 6 Initial RCS Pressure 300 psig 2 SG Heat Transfer Area 29,000 ft RCS Volume, V 6,000 cu.ft. RCS Initial RCS Temperature, T 250 F RCS RCS/SG /.T 50 F Relief Valve Setpoint, S 375 psig Relief Valve Opening Time, t 3 sec. I Applying the heat input procedure: 59

Step Procedure Example Appilcation 1 For both the 350 psig For T

250 F and t

RCS and 400 psig relief valve 3 seconds, UA = UA = setpoints, obtain the reference 350 400 normalized UA (UA and UA OI* I9"'** 350 400 CIS. for the initial RCS temperature (T and relief valve (V ' = 6000 cu.f t.) RCS opening time ( t),using Figures C14 and CIS. 2 2 Determine what fraction, f, 29,000 ft /58,000 ft = 0.5 2 constitutes the of 58,000 ft actual steam generator heat transfer area. 3 Multiply both UA350 '"d U^400 350 " ^400 = 0.139

  • 0.5 UA (from Step 1) by f (from Step 2)

= 0.0695 to obtain new normalized UA and UA values. 350 400 e 60 m

W NC I223 03-00 Figure C14 i U- - - p---- = ..= =.. I e -rqa;

l

-l: ..,..-= n.[:

d.,=

n_ .: = =n a = = .=== EFFECT OF STEAM GENERATOR UA ON = =. 2U =)...-- ..+.2-i .r- = n

=

() i .1

li.

PRESSURE OVERSH00T .i.-;=::=:{ur. :n..- .it: - =

!p"...

. _ygg- !" = i. p -j- =:2'=Fji - li: -i r

  • f.*

. h.. " : 0.. 0".;. -.]. =..I'. "* f _*. i'*

.. Z_ ;

-l- .] m. ~ .c 2 nt=. >v)

n_p.3;.... =pn;

...}-

- - - ' up=

=_: j =n: ng.. t:. .7 . =_-t =

: l:... =t:r

rr

=_ :
- n

. _5_ n_ _= a r- .=..:.' =

=

ra r-t :- .n1 = -+' g . : -- p... ...} ur;:chun g" =u :..=2 .n i.

l::-
S 4

- r-- 1:---- ci.j:f. ; r -r:=J. zu nr:-- r - _p :. 2 = = d. u. =t =_..__t-r =.[. =a: ...;:== = t n -- ._.. _i_ n;t=ntn. i== .. _==t===2=- .---:-- 1 =. _ - =/_' _.. ... =t n r._. rn --P=: ..=. u 6_ = ---1

in
nr

=1 ~ =- ._.t = -/t_ J - + - + ...n -

.u-t-- "

.:. ;o n- ,/ a :._ 221:...... : pr:n-- -m..t_ :- -- a p __. ... : t. :...=;=- _ L_ r =.-' - . /

-- --t n

.. _ _ __ _. c--!_ : - r. .::.. _..y f r. u. - - _ -_3 -+ - +- 4 __ _&_r 1_ _.. __4 =--'- ' - - ',--/_----- '-----*----1 4 "=g;....rTEit. + - - g 2 Ii. MIE==ir-iE. -=i --- >n-L _ _=:2-s E e - + :.- ,._.1. =;=;r - .= -a m +f. . s.__t=:-.==:: . = =--! "-c2t.:.-.___.t.--= +- .11,;_.._ 5__..I - DEiila-I. _. :_JP T-H- "f. l' 3.. 3E... _E_ -- -- " 7 ~~~n_=-j -=2 e

t;;-- -t ;--

-- 3; i

.___4_-/- -,

- + - - - + M ~~ !:b_*=,,,,,_

  • - C
72.__2.; ; _ n* -

~*-~ = f- .4 f : .*="_ - g. :; _ E.,: - + - - + - - - ---f; ; --~

};,

-MR -t-- - ~ -' .I:I J= w ::I- [-~ [+- : L'

I C'.

. _ _.m.__.. ,;1:;;; T -f-PfZ':.. -

r.._._... r -*. r tr.-

~ * - - - -- -.1: .L:.;__4.._

..,
j : -

'__6.__ .__. 4_. __ d"r.--[ i _ 4.. . i_M

7. _ a_...

i n _=_. a ,= g .:= - + - - l- _=.u. - + - - - - - - + - - a. =:-.~=- ~ ~ "_'-- E ...D .___ _.. g ^ --*=. *

  • _. -

..... -;7C :. = _.+_. y j _ _,~. 4_! _ _..g. [' - -.!:. b. .l, ' g_... _._ 1 (q g ...a. %::j;_.J.]- (,,f N _ --*~ -

  • g.

**/--- ~ ~ ~ !g; ;*::_. "

1"

G '

.. ;21 1... -4 b " >=e j :-- if E -' g-_ r-- f.z 3 SEC. RELIEF VALVE OPENING TlHE .g# - .__ ; e i. f ;:. - -- y _-- +-.: _, u.,_ =._ g ____3__.i.=... _ I.._ x__ =t - - = .m g, m. -_..y,.- __J _ y ...g. ....._, =_ = ut =f:Dy, n t- :.:---+---- = a: -d F.f. :. i N j f.* -@ /7. ;===== =i=4-b. 5. =---t--] -i , :e

e. 2 :.-,___.

_._._ =... =u:==-- - - - + - q -~.-],,$/ /: =_ -,. =._. y,

- ::=_

_ _. : }...{ .C r rp=;;_ . r 2:.= =4: =._.._.c

-=

- - -, = _ _..

== >..:=. .,ff, ..,;.. ; -,g,;.. .... g.;

.y.;
ww

,s - f;tr - - * ---air = ._= =:

l~; ::,,. : -t=

l=2= w =4=-. . =: =.= p. nr .:1.- - .y=/ f -- _. _..r== u- = uin. .-t :. ' 72.r n

:n!:

O=~: c. _. Wr-/ / h_, _._. h --t.__ _

  • =t: 2.4.__z

.; = ._,I_.[- y o -a - RCS PUMP STFTUP Ill 1 LOOP / n

== i / /A-4- - RCS VOLUME = 0000 CU. FT. 3= ?x -. =.. f__;. //..., _-. _._,__._=.p.. -...a = - ' - INITIAL PRESSUP.E = 300 PSIG

n

=in. =;r:
=

nnt = -- : =._.

  • ==

- RCS/SG ai = 50*f e

=1 r,.. l:. n i==

_ m_ _._. _ _. ~ - RELIEF VALVE SETPOIllT = 350 PSIG --p=;_- t;;=;n:. q

; g. -

- - - + - -- -, - - - 2 U . $....=" "f~~ M -~ '-~ lr ~~+ - SG HEAT TRA!!SFER AREA = 58,000FT ~ = FF :l- - a ii l=-'r' -Ei-= 9== l_ i

2 1

i b! F i 2 ;;: . 7::{. .. =.4 - - i-j 1 r"- i leo i Zoo l I.. 4..... (O l l l j l .) -l. l l p .p ii

i.. l
l!= :-M2 MAX SETPOINT' ps; i-i ei.

.g

g.., r i i. 4 ....3 ..I I i i i i Figure CIS - l.._.. - }...: 8 i. EFFECT OF SlE/di CE!:E."J00:t i% ON .. _.. l. a._ PPiSSU.RE CVEi.SH03T l i ~ 1 . f.. 3...*. f l r- _.0,94-- - - - - - . L.L_ L - i i I ! Y 3'SEC. RELIEF VALVE OPENING TIME .j..:..;._..:..;__.__:4 1 j i l r l ..I _ _. i_._:..i I. _. l 4.. l l t,. 1: ,q. o l o ] i. } I J., _.J_:._.L...2 . ___ ;. __;_.. q__. _. N . _ : _p.... 7.._... __: g l-I ._.I e, .l q i...

i..::

o i 3 't-I t O i N324 pl --,- f O 3 g + i 4 i l l i

44.#

l i i. .i_ c: d,...___,. i 1 6 i, i, i. _.. _ : 1,. t i i,c .. i.:. ...y. 6 l. i. i i, 3 3 r : w .o i n. 1 .l. ( Na .s.

-l b

1

l. -;.

, 44) .I.. 6 1-i I. l

l. N r.'~--g---l~~-----

-,.-:)- b=; :! -

i I

g j.. __. 3 _ i I i o

3. 7 l

g,j3lp.. c t- ,.q.... .p t, ,o .i.,.....,...._..._ / - ._g : ,..x. y.. i t . :.: i T. : t.-: s y,. _ / ..j:., r i y-r .g . l.. i . ~. i e .r i .c i... 4, .L_. _ _. _.z-., __ :.. L ___p_ j l Qb l l I' 1 1 20 y -0.:4o -f' ! -x ...:......_;..... m . 2.. u.4 L.. 3 f. r. - RCS PUP.P STARTUP Ill 1 LOOP l 43 L i ' ~ U +j E! T y . _ _...- - RCS VOLU:4E = 6000 CU. FT. - INITIAL PRESSURE = 300 PSIG Y I =f. ..h.. [...i..[_.... ...j...._i._I..:_. - RCS/SG AT = 50'f i, - RELIEF val.VE SETPOIllT.= 400 PSIG l I t, _ :-f. - SG liEAT 1RNiSFE': AREA = 58,000FT l 7; _... _.... 1 = . t.- . 4__ .L .r i J, _... ! i i. l .i ....7._.... a ) __.o = 240' i i i leo i I.. 3 ..:r.o...._ _ 8-..I i 8 + I. _.. p SETPOINT' PSI p ... r.. _. ..l MAX I... _. 1 i, i i l I, ~.. .l. t 8 r l .l. _ 62 }

f 3C 1223 03-00 Step Procedure Example Application 4 For the same isotherm, From Figure C16, for T = 250 F, RCS I RCS, and for UA350 '"d t = 3 seconds and UA = 0.0695, UA{00 btain new setpoint ,p = 50 psi. From gure C17, 350 350 *"d for T = 250 F,/ t = 3 seconds ove rshoots. P gg3 <.P f r the 350 psig and and UA = 0.0695,.'.P 6 psi. = 400 400 400 400 psig relief valve set-points, using Figures C16 and C17 5 For the actual relief valve For S = 375 psig,[_P = 50 psi 350 setpoint, S, linearly andt.P'00 = 66 psi

  • interpola's the setpoint 4

overshoot,/ _Pj,UA from the for the new steam generator relationship: = 50 SP =,. P 375 350 375 - 350 S - 350 - l l 350) , 400 - 350 (66 - 50) 400 - 350 (, p400 _p = 58 osi O G l 63

f it =t=} : m -1 r ___ .... _. =..=. _ _.f==_ l..:i... t .r

.=
L.

". _ - +. _.. Figure C16

4....

m _.. rr..x.. =._.t.=.-.-" .:t. x..___. __ g . =.=. EFFECT OF STEAM GENERATOR UA ON... h=:= -=:====t= ; = .:x r

t._

- - -= D PRESSURE OVERSHOOT . l.:...u...=. .: = .r.. .e.. ......_.i. u -t - ----_4.____ - :t. = ~=t n = n#=_ _=$ =:rn t.- - - n ;= 1. = t =_.... n_ .g- .. _ _ _._._-.4- = _ _. _ .._. nt_.. _..... _.._. ....t.._.. ._._._t._ .1.. .___ w._.... _. ..g...__,._. m.;... .l. . :. n. t.____. g r =_ h. -. i. _. -- D w-g.. m -... m. 7 c: :.. 1 .... t=... _ ---._ ..l... ....m... u.. : ...:.. =. _.. = _...=...f=...n_..=_ _ _..=1;=-~~l-

}ri-]a

= ._;;= :;C p_ u 4 %. ~ ~ - * - -

l :. **
u.u=

=. r . - u_ - ; t. =:=:

*t-* E-"-_'*1

.-}*. -* r ~~.

.-t

,. ;;;- C'...1---+- . _ h: * -- -+-r-rh =~... = _. 4-

I': ~ *C:{=.-

I _.: : :t ..:,.. u m.____ = -- 1. L. n. ..._.E,..- *- n. ./ a.:__. r. __ _ _- . ; +t =.. _ =._=_ J ..__.<p.= .. )'........ .... r....=.t.u. = "I-t =..::. *,. - =; - t 4 ..... :.-- h".- ...r T- - f=,_..__[,-

t....=Jr.

... t ur =.1 =c= l : :.:;-= rtr.C '. :i = g =:l== t~.- -- t = r _t==tr= -- ...,. _ + _ _.. _., .p.. ...y_........ . _. _. ; g. ; 3. {_, _. 7_ _ ,, _..g 8,. _. .g._.. ....g .y _. _4.__. y 7 ,. _. g

y...._

g._._ g..;.g;.;g;; .O

Ir- -- t~l.
.* t- ~_

% ( Jn'- 'm .r.' --- - t r--*'. -*----*J e __+. _/ 3 _. u :.._ _ .:.-~ = : *.. "];,.- p... =+.

-{. ; _

1

p. O 1

~ j_ ~ -t- ^ _ a..... O. -f :i ... i = g -

pa .-'.n. -..$;_.. e. ....* =.. __ a. _. _6 - ;_-- E f _ y, ; _.,gu_ m

,, p..
;,,.. -
;3: ~'

T..- y 0 1 t _.4 7 4__,,_ ,~ ._.4.._ _ q.

n

,.,.. t, - ..__...g y_ f; .t___.6._.. -+- - - - -- r - - - - t - - = r y - - -- r -/ ' - - - - -- -- 7 ..t-- - L._.* g.y: -u=.= 1 2- = =g - c;. 1 r u._. - I. : a_.. J i-l ._-r._..._.. .. j. .~_p._ p) =3 g +- ~ t -- r - - ---,----v---

- =+.-r-r--: f:-

3' SEC. RELIEF vat.VE OPENING TIME + - + - + + - - + - -+ -i -+- u ... m...f- 'r~Ir- = ::. g... = _. . :=. _ _r t...=.._ _... v". g.. ;; =.g .1 /g - .r. g . t. . f. 4_ _.. _ au n t.....: : : 1:.;n__ '--- . --..,. a: _;g . :.=: ; ;._. "-- /=::Np/:-]r:L. ' u-- . _. -{ ~--- =t. __ 2.2 - f.

.--+-.!

.:-~ . [....r o .:j=n: =t.- J -J r-3: - ": ,._ ; = _.r. < =_. F J --'1-- g -- -- -r : _ t.._=-

t---' = t---.=N

, f. Yi .t.;;~-+' - -- F :-_ - _ - l- = (%, _ r t- - - 2-tr.. =.. .-.._,_j, -.g; _-.._e, 2e

~

_ _. - + -.._-- ;-_ - x l .=_.:5,.2_ -

j. -

t . - - -- s __. _. -- - - - - + - - - - -i

:. 2.a.. :t

2.

g; .._.__ =. _ ($ y- - -- - r. .j r -

=

=;.: 1_;;= 2ur .g p = --- 4 ,:._-=. .vu_ p

f. =-

F_2_ : - - -* 2: um._ -.. =t = ,d 3 / / k.e f. - RCS PUMP STARTUP IN 1 LOOP =r a 1 p- - RCS VOLUME = 6000 CU. FT. / h '.. .f.__.- _ _ * - - INITIAL PRESSURE = 300 PSIG _.__.I_____.*=-= _..= _.. __:._..f_ __~:-- - - RCS/SG AT = 50,t .....= ~ "~ ~~

u z._

n r- - = =. - _: __ =_= =t=--- = _..... _. _ _. n.... _ _ _ _. .. ' - RELIEF YALVE SETPOINT.= 3$0 PSIG .=. {. =...=.

x....

,=....=... _..:. 7 [m =.. ...T - SG HEAT TRANSFER AREA = 58,000FT-g .e u =. m u- . i.: ...~ t.

6. -

g g- .l r F. l

- l j

j .t- :- i =. ~ s ra i d-o: Zoe j-i. %,.w i . lee. i n! r ,a.- E. _.. p a t- -..d~ I [ .l:. i i n: t v i SETP0lNT' psl' a. a=.

l:

t

_-t =

9 p -m=~

m:

-t : - menr e t s:. MAX = . j _.. = I. :. ..=.p.... . =.. =.' =.__

._. m.....

.l. .l..:...: - .i. .g.. n._. ..}. ..g... .l..

s , - :-E-1,l22F 0bl OO-r 1 .) I.- t .r. i j ~ Figure C17 i i EFFECT0!STE/3.UEl:EPJ003UhOil i !.'.. 1', 1. ~ --. -... i i.. PRT55Ui:E CEITH001 - e__._...... 4 t J l i i ..!.. 4 - L.._.....; aLa.8 4 i i j i i 0,M i.--------------- i i r. . l.. { i I i ~ q 3'5EC. RELIEF VALVE OPENING TlHE i l id i i j. _ j _.;_.t...... p ', .t i t. f. j i t l . q.. I..i. I _.. t_. i 1.. i ,.4.. o4. - .l f...., 3..... l i: I .j i r I i l 4 i i l T l i l 4,. l ._ j.......... _. _..:.. a l l .4 g 7, I l t o 8 g =: p, j gg . [ .t. .l

4_

..= .t 4

7.:.

l { t.

. j 1

i l l-i c

i

>i.t t .i i ...... 7..- _ y _.t......i..... 3 .t l s,. t ..a1t.. .. : t. :;: n q .l.. :. ' I .,g-i g -l I. p 1 f e a l..,.,_ l 1 1 t ot .. u:g3.. ]

. l l

--l.g. __l

N

. ;.n :;; g.g. w-I i l ? i s ...., _u a._,. _:.... _;. a,.. a p.. w p

i..

.l-:- l; l l g

o.-

t 2. i _ g . ic g j@.

p. _.

..J.:.[ .2j. L..!_..;..j_. _ e.._ I i l' I r T I 3 ,X_ -[ y-j

4.-

i - --f y .....:...t .. _.a - i t ,l 1

+

i ). . go )g ,/- .if-f.. _... ~ _; _.... s... ;.-.__ y -.:._.. -_ L i i i A- ! hl fi~'I II- - RCS PU 'P STARTUP Ill 1 LOOP J [ [.i 4 .-]k - RCS VOLUME 'E 000 CU. FT. l" 6 -1 l gg y b.

b.. k.,.

- INITIAt PRESSURE = 300 PSIG -2 3 L,.,.' ?. t..l.,'l' ^' lT . /. ': / .T - RCS/d AT = 50*f L.. I. p - u_ - RELIEF VALVE SETPO!!iT.= 400 PSIG l 2 ..a _.p:-

..
_..t.

SG liLAT TRNISFER AREA = 58,000FT j .-{_.- ...._........._.} t _ _ :....._._. 7._ .q I 1 t l g l j _ g... d;. . M i loo i 200 l. ' --P -PSETP0lHT' PSI j _.-4 MAX ....g... j....... ... :.. i...q._._.y ...q_....i _ 2._ l .:.;.C.L. .L. i 65., [ l,. ] ::

t, -

t

e 30 1223 03-00 I REFERENCE c-1. " Pressure Mitigating Systems Transient Analysis Results," July 1977. (Westinghouse Report on RCS Solid Water Overpressurization prepared for the W Owners Group on RCS Overpressurization.) ) I l ( 4 e i o 9 l 66 -.. :: L

b Dec'enher 6,1977 D eu ; < ~ t . e c c.' ( [oy-Cof cs t^ N j hc.%( T0: Utility Group Participants h2 % o^ b M Diy iE k % cef Gw (

REFERENCE:

" Pressure Mitigating Systems Transient Ana ysis Results " July 1977. (Westinghouse Report on RCS Solid Water Over-pressurization) Utility Group on Reactor Coolant System Overpressurization I Attached are three revised figures which should be' substituted for the L ycorresponding figures to be found in Appendix B of'Referenca 1 The

j revisions accommodate modifications niade to the letdown isolation j

transients represented in these figures to upgrade the analytical basis I and account for an input data correction. Setpoint pressure overshoot has not been altered in any of the transients plotted in these figures; however, setpoint pressure undershoot has been ) f modified in several of the letdown isolation transients. In every case, the modification has resulted in an improvement in (i.e., smaller) set- ) point pressure undershoot. In both Figures M6 and M10, the common transient exhibiting RCS setpoint pressure undershoot response for two relief valve operation at a setpoint of 600 psig has been replotted to reflect valve closure at a reset pressure 20 psi below the setpoint. The original transient depicted in Figure M6 and Figure M10 of Reference 1 (Appendix B) represented valve closure at a reset pressure 120 psi below the 600 psig setpoint. As would be expected, the setpoint pressure under shoot has been significantly reduced to the pl extent that miniatinn nf the RCS Dump seal pressure limit is no longer a consideration for this transient. ~ ~ In Figure M7, the setpoint pressure undershoots for both the 500 psig ) and 600 psig relief valve setpoint transients have been adjusted to reflect a correction to the LOFTRAN input data. A reduction in setpoint pressure undershoot is evident in both transients. \\ Should you have any questions regarding the attachments, please contact the undersigned. t Very truly yours, k.0 w H. W. Gutzman, Project Engineer Projects & Regional Support (}}

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