ML20235L849
| ML20235L849 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 02/15/1989 |
| From: | Moran D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| TAC-62260, NUDOCS 8902280005 | |
| Download: ML20235L849 (28) | |
Text
{{#Wiki_filter:' n papuf* s dP UNITED STATES [ 'g'#(A[g
- NUCLEAR REGULATORY COMMISSION g
WASHINGTON, D. C. 205S5 r g February 15, 1989 Docket Nos. 50-259/260/296 LICENSEE: Tennessee Valley Authority FACILITY: Browns Ferry Nuclear Plant, Units I, 2 and 3
SUBJECT:
FEBRUARY 1, 2, 3 AND 6, 1989 HEETING WITH TVA TO ASSESS THE ELECTRICAL CABLE INSTALLATION AND AMPACITY ISSUES AND ACTION PLAN FOR CLOSURE On February 1, 2 and 3, the ADSP staff met with TVA at the Browns Ferry site to discuss electrical cable installation and arfacity issues. The meeting was continued the following Monday, February 6,1989 at One White Flint North in Rockville, Maryland to close the discussion of ampacity. The attendance rosters are Enc'osure 1. On February 1, 1989, the meeting consisted of a discussion of TVA's method for assessing cable separation problems and TVA's proposed corrective action. TVA had been asked to review the groupings of' cables for which adequate separation must exist. TVA had not progressed sufficiently to provide exhaustive quantitative information at that time. For example, it is necessary to detertnine the total number of cables requirf ng a verification that the separation is adequate. This meeting produced a tist of major items (Enclosure 2) which TVA is to accomplish as part of the resolution of the cable separation issue. On February 2,1989, the meeting on empacity covered a review by TVA of their current effort at Browns Ferry Nuclear Plant, (BFN) Unit 2. The agenda and TVA handouts are contained in Enclosure 3. The ampacity program status is shown below: V review - complete; 1300 cables were reviewed, no failures in this group 3 V,V - 66% complete 29 failures to date 4 5 - scheduled to finish February 1989 V,V - walkdowns complete 4 5 - analysis performed - final calculations - March 31, 1989 - 117 failures Calculations - Software QA finished February 28, 1989 - Completion - end of March 1989 / 8902280005 890215 f8' PDR ADOCK 05000259 p FDC
{ \\ TVA stated that it expects to save 60 to 65 cables by use of the diversity concept. The ampacity data base information can be used in resolving the cable separation issue. l l On February 6,1989, the ampacity meeting was continued at One White Flint l North. The agenda is contained in Enclosure 4. This ineeting was devoted to resolving the 60 C EQ limitation placed on certain BFN cables. BFN has approximately 40 cables rated between 60 C and 90 C. TVA explained their testing criteria for determining the actual temperatures which the 60*C and 90"C cables will see during accident scenarios. The time frame (time. l temperature duty cycles) during the scenario was also presented to the staff. TVA's ampacity resolution effort is scheduled for completion at the beginning of April 1989. j The NRC staff ir,spected and is in general agreement with TVA's position on how the 2ES320-Z cable was damaged during installation. TVA will provide a subraittal to document this damage and to document the resolution of this concern as presented to che staff in the January 19, 1989 meeting. Q avid ora. ProjeRT!! macer TVA Projects Division Office of Special Projects
Enclosures:
1. Attendance Lists 2. Major Items To Be Accomplished 3. Meeting Objectives 4. Cable Ampacity Meeing - February 6 cc w/ enclosures: See next page DISTRIBUTION Docket FITT NRC PDR Local PDR Those on Attached List ) i / _= OFr. :NRR:TV% A : NP.
- TVA: AD/P NAME :M
.s n:as
- SB k
DATE j /l /89k_______::_2/ /89
- 2/ h/8' 0FFICIAL RECORD COPY
_ ~
.. p, .,p., .j - w,. - ~~ V,: ENCLOSURE 1 FEBRUARY'1, 1989-ELECTRICAL CABLE SEPARATION n Organization. 4 Name .TVA' David Skridulis NRC' Hukam Garg NRC Angelo Marinos NE J,.D. Collins NE J. D. Hutson NE Jeff Rinne NE .E.1J. Bradley t ' (- i I l \\ \\" l -i g,' .t. . l' I' .s i l l .J
+. 3 w,- F ENCLOSURE 1 FEBRUARY 2. 1989 AMPACITY EVALUATION' Organization f Name TVA Art ' Alford Bechtel John Rommel NE Brian F. Reagan TVA Masoud Bajestani NE Kent W. Brown Sandia Vernon F. Nicolette Sandia Mark J. Jacobus-L NRC Hukam C. Garg. NRC Angelo Marinos. NE J. H.-Rinne NE J.'O. Hutson .I a i i
ENCLOSURE 2 MAJOR ITEMS TO BE ACCOMPLISHED FEBRUARY 1. 1989 CABLE SEPARATION l Need to establish that the evaluation groups are separate non-related ] 1. groups such that statistical approach can be utilized. Exclusion of the V3 safety-related cables from the evaluation is of 2. concern and needs to be justified. NRC will evaluate TVA's statistical methodology when it is worked out. 3. (Formula and acceptance criteria). TVA will perform additional review of drawing discrepancies and evaluate against the basic sepa;ation criteria in order to justify the 95% 4. confidence level in the cable and conduit data base.
,,*/,, l ENCLOSURE 3 AMPACITY MEETING OBJECTIVES FEBRUARY 2, 1989 4 MEETING OBJECTIVES.- 4 - AMPACITY STANDARDS } - BFN CABLE SIZING - REVIEW 0F CURRENT EFFORT 4 NPK2 - 5930W w_________________________
s- ..J. '. v,..,. -5 AMPACITY PROGRAM STATUS .+ REVIEW - COMPLETE (1300 CABLES REVIEWED) V3 - NO FAILURES CONDUIT - 66% COMPLETE V,V5 4 - 29 FAILURES TO DATE -~ FINISH 2/89 (100% REVIEW) TRAY - WALKDOWNS COMPLETE V,1V5 4 - ANALYSIS PERFORMED BUT NOT CHECKED - FINAL CALC 3/31 - 117 FAILURES CALCULATION SOFTWARE - FINISH QA 2/28 PROGRAMMATIC CONTROLS NPK2 - 5969W
gg )
- . _. ;y x' L
,g
- o...
. q 8 (,# ( IREQUIRED
- I LOAD X' M D
s WHERE: I LOADt'=-LOAD CURRENT OF'END DEVICE N'# M = LOAD MULTIPLIER P 'le "' D_'= DERATING' FACTOR p L k' 1 l 1 NPK2 - 5930W (:v ~ =
i- 't ke -l.U. . ( V. ~e o- .. - o 7 ' f, l. t J ,q .1% 1; Crou section slice from a randomly arranged, closely packed cable tray, ,s g , SINGLE / s CABLE I / / \\ a. \\: ,N/ \\ \\ / / O eflective l Fi. 2. Physicalsi:e comparison of typicalrubber insulated cables. t W.g i AT s '/ o ATg s C ABLE MASS WITH UNIFOAM HEAT GENERATION Fig. 3. Simpli])ed analytical model for heat transfer from a tightly packed cabk trey contasnmg all power cable. i l I 1
- r..
J',, U., y. DERATING FACTORS ADDED TO TVA STANDARDS
- TRAY
- TRAY COVERS - SOLID B0TTOMS - C0ATING DEPTHS - CABLE DIAMETERS j - MIXED INSULATION RATINGS I - APPENDIX R COVERINGS - DEPTH OF FILL - SPACING OF CONDUCTORS (MV)
- CONDUIT
- NUMBER OF CONDUCTORS - GROUPING FACTOR - MIXED INSULATION RATINGS - APPENDIX R COVERINGS - CABLE DIAMETERS NPK2 - 5930W
7_ c. o a / "...P o e PHASE;I.
- c
- TVA DS-E12.6.3 R1 7 - BASED ON LARGER OF: /\\ DEPTH OF 30% FILL ACTUAL DEPTH - ACTUAL C0ATING DEPTHS-
- PHASErII' L
- ACTUAL LOADS .g I - REVISED' MULTIPLIERS - REMOVAL OF NON-ESSENTIAL COVERS s - LOAD DIVERSITY
- PHASE.III
~ - TIME DIVERSITY h' f NPK2 -5930W l i 3 i
7 v.. DIVERSITY - OVERLOADED AREA < 2.41 IN.2 - UTILIZES HEAT CAPACITY MARGIN - FUNCTION OF:
- OVERLOADED CABLE AREA
- OVERLOADED CABLE SIZES
- MAGNITUDE OF OVERLOADS NPK2 - 5930W
~ ' ~ f DIVERSITY 0 00 = W100 1 A (W W ACT = IF UNIFORM: QACT = WACT A HEAT CAPACITY MARGIN AQ=Q100 - QACT Q AX = Q 00 + 6 Q (IDEAL) M 1 NPK2 - 5930W
a.. 4 1 l 1 l QMAX > QALLOW > 0100 ANY CABLE QMAX - QALLOW = MARGIN 4 1 I t l NPK2 - 5930W L l I L--._.__________
v DIVERSITY MULTIPLYING FACTOR - M M " Q100 bA-k(QACTOL-0100OL)(AOL) Q100 A [WACT OL - W100 OL ".1- [ Woo 1 l -QALLOW " 0100 +.9 M 6Q i 1/2 ~ i-iALLOW " (OALLOW) (A) nR J i i P I 4 NPK2 - 5969W s --
_ - _ - - _ _ _ = _ - _
- ', 'd.
v TEMPERATURE (234.5 + T )/(Tc - T ) (234.5 + Tc') ,/ I'12 = (T ' - I ) C A C A -I I) I T ' - T 'h= [234.5 + Tc )(I 2 C A L -TA-) ( 234.5.+ TC /lI (TC K1 [ I' \\2 W/0 DIVERSITY T'-TA = C T.C --TA \\I / W/ DIVERSITY r-A ALLOW) -1 I Tc' - TA K1g -TA (TC i -(IACT/I ALLOW)i OR K1 i 1 + e,-l - g / WHERE Tsin = TSTOLPE NPK2 - 5930W A--___-______________________________
,1 , j_ c k r. p I ,8 2 ,4 2 ,2 y t icap ,6 m a 1 de t E u V r R / E U tn V C ,2 e R A rr U M u 1 C E c m A N r M o E A p N E o C I A ,8 E C 0 I ,4 0 O 5 0 4 5 3 5 2 5 1 3 2 1 0
- I aE* m3ENe t aEo
.sOoo
i E I VR d U et C a e r Y TI SR i i E r V e I p D o e EVRUC i Y T ISR i 1 E V ID e E S rV VR uE U V C gR iU A i FC M E A N M E A i N E C I AE e C I E I V d R e U t i C ar YT < IS i i R r E e V I p D o i ~ 5 0 4 5 3 5 2 5 I 3 2 1 0
- t aE3 m3ENeaI [2 %$
- lI M
c' e ~ 0 2 m 4 o i &ddx R 9 4 P 4 N S Y P A M R A T 9 7 TS GT E N WE T AR R Y0U T1/C I - E S N RCI E/L 1E V S 0A I 2 D1I f<
...g.. 6 1 -@@@C si Q h8 s a hS s l >b
- s. 5
> c; M N ><
l' lIlI llIlllllilIlIlIlll - 6 G C 0 8 .3 6 N
- 9 6
7 8 TH Y Illl IlIlIlllIlIlIlIll R ~ A S N T 2 2 4 0 y I L . p c M U x ml C 0 4 I S a e a' 9 0 0 1 9 3 d d s a L E MT C 1 1 1 1 e w L' R c e E R u c P IllI llllllIlIlIlIlIlI d a o r r 8 8 9 8 3 p d pt 3 3 1 5 1 d d e y r amsC e e' 0 5 7 2 0 9 a e MT T 9 7 6 7 6 7 w v e o lI llll 1lIl1lIlIlIl1lIlI c c a r e h 0 e t 2 h 0 0 0 0 0 t n i 2 2 1 4 2 m C C n i s d u e e e e e e e e e. o p n o0 n n n n n n n n s l 6 a r i i i i i i i i e b 1 R G l l l l l l l l l a2 e e e e e e e e b c s s s s s s s s a t a a a a a a a a c l s l e B B B B B B B B l at M l 0 l1 illlllIlIlIlll1ll a1 n g 2 o n 1l n i 1 d d d d d ot d r e e e e e s e u z z z z C z d e s d i i i i i e t o m e e g g g g e g s p r o p n n r r r r n r o g mo d u i i e e e e i e p n it n o0 l l n n n n l n mi c a r e e e e e e e e ir n u R G s s ~ s u ed R a a e e e e a e nd h n O G E B D - D D D B D e w o T N h g c h w n. C I i d . c t UD 1ll1 IlIlIl1lIlIlI[1ll h t ed i s D A c cl eh e i ul mwt N O OL d d d d d d 2 e e e e e h d a r t z z z z z C z w n t o e o C o s f uh i i i i i m e g g g g ig e g e c n rl o p n r r r r r n r u i e a e e l t p vh d u i e e e e e i n oB l n n n n n l n a s r t a r e e e e e e e e v e et t R G s s t v e a n a e e e e e a e t t o yh o B D D D D D B D a o c t .h h t e t y o s r lilIlIlIl1ll d e a nl u I' e s h r at 1lll Il1l i l t t s u a n q r l a - o e e 0 p u nl 2 p q o ai p 0 0 0 0 0 + a e t t t m e e a n e m + + + + + C C g t r ml e t 2 2 3 1 5 n n u u r d u e e e e e e e e i et t c r d o p n oA n n n n n n n n t r a el u e a r i i i i i i i i a r r e a c t R G l l l l l l l l o u eh c a e e e e e e e e c c p s C r s s s s s s s s m d a a a a a a a a e e ed n e s B B B B B B B B l n t r a n e b i a i c al dd s l u l1 1llI Il1lIlIl1lilIl1ll c e e n t ed s t a s s o o a a t e a r N B rS T B p T S. 0 1 2 3 4 5 6 7 E O 1 1 1 1 1 1 1 1 T N 2 2 2 2 2 2 2 2 ab cd e IlllIl1l1l1lllll1llll i
.,. y.. ,. ~ + 4 HEATING 6 VS DIVERSITY' 3 TRAY NODE HTNd6 *C DIVERSITY 'C ~ 2FS-ESII. '2 9.. 57-92 2FS-ESII-11 58 93 2HO-ESII-3 64 78 '2HO-ESII 6 64 >150 -2AQ-ESII -13 60 74 2AQ-ESII 15 59 69 2GU-ESII. 2 58 69 O i. c NPK2 - 5969W I _Mb__._-_I.____________._________-.______._..___________________.________._.__-_._._______
p.- "h,.. / o FLAMEMASTIC TEST TR Y l 34 - 1/C 500 MCM XLPE / CSPE. BASELINE CURRENT - 363 i -l l O OO O 000000 O ~l O Oo o O00000 6 l i
.i }. ,o 4 .FLAMEMASTIC TVA HEATING 6 AMPACITY ' THICKNESS TEST CALCULATION PROGRAM 0.00" 1.00 l'.00' l.00 'l.00 0.25" 1.00 O'.50" 0.92 0.91 0.91 0.90 0.75" 0.90 l -1.00" 0.87 0.86 0.86 0.85 1.25" O.85 ~ ,0.83 .1.50" 0.83 '1.75" 0.83 0.83 0.83 0.82 2.00" 0.82 1 0.80 2.50"- -0.80 0.78 3;00" 0.78 y 0.78 0.78 4.00" l 0.76 0.76 g r 6.00" 0.74 8.00" i l I r I ) 1 NPK2 - 5969W
a ~ d i ee q# 6 9 4 ) CONCLUSIONS 1 SOME BFN CABLES UNDERSIZED \\ 1% APPROXIMATELY efe CABLES BEING REPLACED DIVERSITY MODEL PROVIDES ADEQUATE LEVEL OF MARGIN-AMPACITY TESTING PROVIDES REASONABLE ASSURANCE NPK2 - 5969W
lh'WJ(K m l;%'.. 1 W; l @;![$g' y i s 6 " = -a j ',;.in s i, ,1 3[,.* + e w \\. b0# ENCLOSURE 4 i CacLt aemat.iiY i p.ch 3 9 e FEBRUARY,6, 1989 -{ j aq p ' - j - g;.1; l n ~,:. s. 1 W1
- y.8p e1[h s
( ,ti.- y, CABLE AMPACITY l PURPOSE RESOLVE 60 C EQ LIMITATION l l APPROACH REPLACE THREE HARSHEST AREAS i 2 ~ REMAINING AREAS GENERIC' ANALYSIS XLPE o Literature Search i l o Review Test Data Purchase Specifications vs Industry Standards o i ) 1 t-
" :. O. Q};fp - ~ , '.. v 3-- . Browns Ferry Nuclear Plant CC' Regional Administrator, Region II General Counsel U.S. Nuclear Regulatory.Comission - ~j Tennessee Valley Authority 101 Marietta Street, N.W. 400 West Summit: Hill Drive. Atlanta, Georgia 30323 Ell 833 Knoxville, Tennessee 37902 ~ Resident Inspector / Browns Ferry NP U.S. Nuclear Regulatory Comission Mr. R.lL. Gridley. Route-12, Box 637 i ~ Tennessee Valley Authority Athens, Alabama 35611 ~ SN 1578 iookout Place Chattanooga, Tennessee 37402-2801 Dr. Henry Myers. Science Advisor Mr. C. Mason Comittee on Interior Tennessee Valley Authority and Insular Affairs. Browns Ferry Nuclear Plant U. S. House of Representatives P.O. Box 2000 Washington, D.C. 20515 Decatur,' Alabama 35602 Tennessee Valley Authority Rockville Office Mr. P.-Carier 11921 Rockville Pike- ' Tennessee Valley Authority Suite 402 Browns Ferry Nuclear Plant Rockville, Maryland P.0852 P.O. Box 2000 .Decatur, Alabama 35602 Mr. Oliver D. Kingsley, Jr. i Senior Vice President. Nuclear Power Hr. D. L'. Hilliams' Tennessee Valley Authority Tennessee Valley Authority 6N.38A Lookout Place 400 West Sumit Hill' Drive 1101 Market Street W10 B85 37902 Chattanooga, Tennessee 37402-2801 Knoxville, Tennessee Chairman, Limestor e County Comission P.O. Box 188 Athens, Alabama 3501 Claude Earl Fox, M.D. e l State Health Officer State Department of Public Health State.0ffice Building Montgomery, Alabama 36130 ) i i Q l....
i
- v.. c A
. ' i '* ' A, ,.i ,/. DISTRIBUTIONFORMEETING
SUMMARY
_ DATED: February 15, 1989 Facility: - Browns Ferry Nuclear Plant, Units 1, 2. and 3* I <xCDocket? File,, I NRC PDR Local PDR' Projects Reading ADSP. Reading 'D. Crutchfield B. D. Liaw j S. Black R.: Pierson D. H. Moran' G. Gears M. Simms F.-McCoy RII J. Rutberg 15-B-18 i L H. Garg l A. Marinos ACRS(10) GPA/PA 2-G 5 7 GPA/CA 16-G-19
- 5. Vargt 14-E-4 E. Jorden MNBB-3302 B. Grimes 9-A-2 P. Gwynn 16-H-3 J. Scarborough 16-H-3 G. Marcus 16-H-3 T. Elsasser 16-H-3 4
L. Norrholm 16-G-15 C. Ader 16-H-3 'BFN Rdg. ?fle'
- cc:
Licensee / Applicant & Service List i i __L_-_.__----___ .--_-___A_ - - _ _ _ _ _ _ _ - - - - - _ _ - - - - _ _. _ _ _ - - -}}