ML15224B212
| ML15224B212 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 11/08/1988 |
| From: | Pastis H Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8811150110 | |
| Download: ML15224B212 (16) | |
Text
{{#Wiki_filter:November 8, 1988 Docket Nos. 50-269 50-270 50-287 FACILITIES: Oconee Nuclear Station - Units 1, 2, and 3 UTILITY: Duke Power Company
SUBJECT:
SUMMARY
OF SEPTEMBER 8, 1988 MEETING ON FOULING OF THE REACTOR BUILDING COOLING UNITS COOLERS On September 8, 1988, the NRC staff met at the Oconee site in Seneca, South Carolina with Duke Power Company (Duke) to discuss fouling of the coolers in the reactor building cooling unit (RBCU) system. Meeting attendees are listed in Enclosure 1. Viewgraphs used by Duke during the presentation are shown in. During the recent Unit 3 refueling outage, Duke tested the RBCU coolers and found that they could support only 91% of full power. Duke committed that before restart they would clean the coolers to be able to support full power. The fouling was caused by lake sediment on the water side and by boric acid precipitation on the air side. Duke will continue to monitor the performance of the RBCU's, to investigate the cause of the fouling, and to determine the fouling rate. Original Signed By: Helen N. Pastis, Project Manager Project Directorate 11-3 Division of Reactor Projects - I/II Enclosure (2) DISTRIBUTION -Docket Fi re NRC PDR Local PDR PDII-3 Reading S. Varga 14-E-4 G. Lainas 14-H-3 D. Matthews 14-H-25 M. Rood 14-H-25 H. Pastis 14-H-25 OGC 15-B-18 E. Jordan MNBB-3302 B. Grimes 9-A-2 ACRS (10) --Ie!6 P II PD PDII-3 M H i:sw DMatthews0 810/ 1/88 101/ /88 1150110 81108 PDR fADOCK 05000269 P PDC
Mr. H. B. Tucker Oconee Nuclear Station Duke Power Company Units Nos. 1, 2 and 3 cc: Mr. A. V. Carr, Esq. Mr. Paul Guill Duke Power Company Duke Power Company P. 0. Box 33189 Post Office Box 33189 422 South Church Street 422 South Church Street Charlotte, North Carolina 28242 Charlotte, North Carolina 28242 J. Michael McGarry, III, Esq. Bishop, Liberman, Cook, Purcell & Reynolds 1200 Seventeenth Street, N.W. Washington, D.C. 20036 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 525 1700 Rockville Pike Rockville, Maryland 20852 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 Senior Resident Inspector U.S. Nuclear Regulatory Commission Route 2, Box 610 Seneca, South Carolina 29678 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W., Suite 2900 Atlanta, Georgia 30323 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Office of Intergovernmental Relations 116 West Jones S-treet Raleigh, North Carolina 27603 Honorable James M. Phinney County Supervisor of Oconee County Walhalla, South Carolina 29621 RBU MEETING Fred Owens ONS/Compliance/Shift Supervisor Ed Burchfield GO/Nuclear Engineering Rick Harris GO/Design Engineering Hugh Hammond GO/Design Engineering Michael Carter ONS/DE Site Office Joe M. Davis ONS/Tech. Service Supt. Ken Canady Duke/DED/NE Gary E. Rithenberger DNS/ISG Kris Parczewski NRC/Chem. Eng. Branch J.S. Guo NRC/Plant Systems Branch R.S. Lytton Duke/GO/HVAC C. A. Driggers Duke/GO/Hyac Norman Stambaugh Duke/GO/NPD/PERF Barry Millsaps Duke/ONS/Maint. Jim Batton Duke/ONS/Maint. Craig Harlin Duke/ONS/Compliance Paul Guill Duke/NPD/Lic Dick Sweigart Duke/NPD/OPS Len Wert NRC/Resident Pierce Skinner NRC/Senior Resident Dean Hubbard Duke/Performance Engineer Helen N. Pastis NRC-NRR/ONS PM David B. Matthews NRC-NRR/PD2-3 Ellis W. Merschoff NRC-RII/D3RS T. A. Peebles NRC-RII/DRP
E N C L 0 S U R E OCOI-TT71-:P NUCIEAR SEA7TON BUTI-IDTNC COOI-TNC UNT7S I-OW PRRSSURTE TN-T]F-C7TON COOI---F-I:;,'S Nl-'z:'C M]T]F-7TNG STi'P7TPM:BE:R 8, 1988
I-OW Pl::;,']:TSST-Jl:?-'F-Tl,-TJJECTTON SYSTEMS J PT S-YSTIEM 1=>I:ZO-VTD14-S BO-ZH NORMAI AND ACCTDIEPNT FTJNC7TONS ZWO FTJI-T-C-PP-ACT7-Y ENGTNE:TERIED SA--Fl7CTJA-P--DS AC'TUATJEED Tl?ATNS 1 PUMP AND I COOT-ER PJER TRAIEN TNTTT.,en,,I-PHASIES OF ACCTIDT-PNT USIE WA=R FIZOM
- DWST, I-ATI71-Z PHASIES OF
,kCCTIDT;'N':C R-ECTRC WA7-7R FROM aEAC70a BUTI-IDTIQ'0 SUMP SYSTTEM R-7-TIECTS HEAT -20 I-ow PRIESSURIE sEa -\\7TCI:4 WAT-Ea S-YST-M LIPSW A THTRID NON-TES-PUMP TS PRO-VTDTPD - NOIZMAI-
- FI-OW TS 3,000 CPM I-PSW FOR JE-A-CI-I TIZ-A-TN Tl, l ACCTDENT CONDTTTONS TWO Tl--->ATNS IZI-:PQUTRED WHTEN R]EACTOIZ TS ABO-VIE 250 DTEEG al-;IEES OR 3-50 PST COOI TEPIZS AaJE SH-EI-I-AND TUB]-:-- TYP-7 WTT-H RAW WAT)EEIZ ON SHJ7I-I, STID-
DECAY IEAT 1181 AC 1101 LEG I 2 3 LOW PRESSURE INJECTION SYSTEM -. a m PtD DiYPASS to CCAY fATF COOLER 8 L AP-4 LORAE KED lli I0 ALPSV DECAY IEAT P Ual A B 4 C F - .1.2 e a e no a I L2 }- 7 LI t SW ICOVIll la so ELl fluT I I LA 1 I I 2 3 34 to I411~in ADI -:,:6 IE61 (LSIAII-fit COOLERT 8 101 It IE AY LI0 1 ES1 0 -(ES IAILSI
HZU 0 (9 I <(W<4 H N A H NHN U 11 H0 N 00 H P4 V 0 U w 0 3 N U N - H 00 o A H( P4H 30 Q 2 H 00 H H H Z IO N p NFM H H Z ) MU N Z 0O D N OH 00 H 0 H H> u D w H U ON P ] H 0 H (N OH NN 0H N 42 H N NU U)U r HW 0 H W 0 N WNN V HH NO RNW U)Z UH FQ H QH QA HQ HU 4 V U 0 H H UH U U 0 PU H H >U w N) U)3 w U Z 0z 0 -i hw 0 PN j V) D NW Z N OH PN 4 PN N H W 0 ) ZZ$ 00 0 NZ NZ N0 N W NH H NH H F NU V) A 4 0 0 4 4H N! O 00 30
- NW U)U H H V)H ZU HH HRO I
I I I I 1
LOW PRESSURE SERVICE WATER SYSTEM (REACTOR BUILDING & AUXILIARY BUILDING) 1PS [SW IIb LINE 'A-Lill 'U* 16"-{g 19"(g 22 -Ur DECAY HEAT COOLER A')EC HAT ALP AB AD COOLEi '0' 556 -L) L PI A floC K RUC ItDC - IiA-31 I 11 1il A-All A l3 Alt A-31 fAl A-31 III fl -31 A31 a)- 4ES) I () 21 -(] 24 [j SESI -(jj IES) 4ES) IES) f 02 031 II PSW-251 -I PSW-252 2tp15W-251
- 21. IPSWi-252 2L 3LPSW-404
)(I~ (:: I t. I1 O31VL It (yIllJ IJ1240 (
E SL EsLgXIL -'RY LPSW OUT E E -ES-6 RB LPSW E - ES-5 E5-5 ES-516 AXIAL-FAN (TYP)4-RJ LPSW COIL (rve) FUSIBLE DROP OUT DUCT WORK PLATE (TYP.) o oa s OU zGROUND FLOOR OQ -0 c: 2 Cn w cy, 8LOKUT PLATE (TYP) 0DRAIN (TYP) C/) TO RB NORMAL 0SUNP
IDY-PS:EC;N CRTrRaTA PI-,A,1,7'r OPI71?-A'rTONS 1:?]F-AC'rOa BUTI-DTNO COOI-TNC UNT= MATN 'rATN CON r-A-TNMIEN'E ENVTIZONMIF-N'r RBCU OPIF-IZA'rl-:P UNDJEIZ DaY ATIZ CONDTETONS USTNO Sl:-;'NST:BI-1-7 HJ7A7 'EI:;-'ANSYIF-R COMBTNI-:PID HIE-A'r nlEMO'VAL OF ]E O= 'rl:ZATNS OF IPT CAN
- COOI, REAC'EOa FaOM 250 IDI-CalETPS
'EO 140 DI-Gal-EIES TN 14 HOU1:?S IEMT-PaCRNC-Y PI-AN-E OPIF-IZA'ETONS COMBTI-,71-:PID H:EAE alPMO-VAI, CAPABTI-T'E-Y OF aBCU'S AN:D I-PT CAN M:ERr ACCTDIEN-E HTE-&-'r (7J-:ENJ71ZA'rTON TN CON'rATI*,TMIF-N'E I-OSS OF COOI-AN C ACCTDIEN-E HT-PAE al:EMOVAL AE 30 MTNU'rF- =M-E
- FR-,P,-M]F (AF-ElEa TNaJ-:PC=ON PHASIE)
I-OSS OF COOI-ANE ACCTDRN'E HEA'Z IZJEEMO-V-A I, IONC 'E]:PIZM -EO -,kSSUa-T-:i' 'EI-IA-E CON'E-,4]ENM-F-N'E -EJ-:PM PT-iP-A'EUR-'E PIROFTI-T-P MA-ECI-IIES IF-N"VTIZONMIF-N-EAI-QT-JAI-T:FI:CA =ON I-ZRQUTRI-:PMT;N7S -ABO\\71-7 Ca=lEaTA ASSUMRS -EHIE IOSS OF -ZHTP
- Bi;,sr i-PT cooi--F-P Bj-:;,s-E lZTEAC'E01Z :BUTI-DTNO COOI-TNC UNTE AS WTEI-I-AS OTHF-IZ CRI-:PDTBI-]F-STNGLlzi' FATI-UIZ-Es
HTSTORY 2/6/86 Ealuatiri of McGui-re ei a t e c hange ful c 1 - rig 1ed to rae cz <D mm - rid a. t L c) ri tc) periodically test LPI arid RBCU coolrs 2/86 CoolerF degri-adat1zioni was toCC observed an rd an ial yze d ~ usig 3/87 best avilable analytzical methcd s Arialy-sis reut shocwed acceptable for futll 3/30/87 Coers were eluated for postz acczident conrd itionis anrid founirid to C be~x uacce ~pt a ble forc futill power-opeation 4/10/87 CrIfi-matory-Order Ised for Uriits 1, 2, arid 3 Uriit 1 limitzed toC 91.5%~ Unit 2 limitea-d toc 81-7% Urnilt 3 cla arid test 4/30/87 LER 269/87-04 i~ssued for<tc LPT arid RBCU Fulinig Units 1, .2, arid 3 5/13/87 Meeting held with Regicor IT -t discusxs coole<Dhr - fculiig 7/13/87 SITA perfomed ni LPSW tc> 8/19/87 7/21/87 Meeting held with ONRR tozC di s cus si c c) c le r f c ul d rig 11/5/87 Confirmatory Orde-lifted r Unit 1 4/10/88 Confirmatory Order lifted ori Unit 2 8/17/88 Perfrmance moiitoCirig eveaeld Un it 3 cco l ersz-foD uled. NRC rCtified per 10 cfr-50.72 8/18/88 Unit 1 arid 2 <coolrs vera-ifie d operable
NSTAT-uREZ3-OF FOULING K~ce~E~~ t~ir-bdity <2-0 NT-U xg D c--- pc iit m c> J-y -si:L t -i-i iy) T Yriid f--L -=L J cz-L r- = ri-rigS c-dep c -s -n 1 3 mritl1i dlc--p <D s;ts ,A d fr Sid-lc >2 Bc Ccvri ditL T Ti d-ti - a-- l a d p < it-is 18Mc,r1Ethl cepcs -Emge--riczy Citicris
JFOUf-][I\\TC, RA CIE DR7r1E'l::?MTNA'TTON
Dl:PEIEPMTNA-TTON C> -)7 1-1 -LI 2 - C. p a r-1:s Ui-xj-t-- 3 St--zat: -Li:s;
SLt-I4ARZY/ CONCLUS TONS al c--- 1, -3 cp p d-t-i c m-r a. - ri-- tic, m c ri i to a ri d a.~c d ri Ltca e-i S i-c mca-it-a c E- ~r Et cl -Li ~ z-Cinric : E > <D r i I: i d-ia :E i Da a > ri c> RBi C' I: pi --1: iL f-m Em. S i -t -- j-3- ircr-ma- =tic i -- ki c--j-Cr - a -- C-IDC-ti -t i a Sr-1r Cii 1aInicze tf an~ i 1Clj C.r e in-g D-iika.-L wi--ll Izntnix~to mcnrii t-cx~ath p~xfc~z-acnz czap.pahbli -ty cf t:a RBCU, _s; tD i r-I7E-S; l E- -iga-' th za -M c-- (D: -c-tf <D -Il -
CA-ICULJTATT:ONAL-APPROACH BasF-c U c) i t b ) it irnri -U-t a~ric d s -lunp -t- *e--mp c-- -r- -EL -t r-a -t7 3 0 in ia ii t-c- <D 1 1 c) w - g a LOCAP araCl -~e i~~ ~ t:Ea=M pciarc 1 ~ ~ ~ ~ L7 111 C-ri 2 EBU' i U1zif~ t c-- 1i -- z 11r' --r-~U deca y za - .-t,z 1 00L pt-y c> Wf T -~~- la ti-i 1aL inCX.1zapaciizLty cf tri a.1(w.D pcw <Dr~ j la I:.c~ dtEC) ina.t YiEt -i c ar a.i1a .l -~nC) T. (2e-m-ril. i ac cri t i t D c-m p-- E-a a.- t-yi _- i E-C a ILOCA girEiiitzi c~ie SAR wlaictIi -a.&Lia.tfat 1 L-PT c c1v-arid 1 RBCU -Ba.-Sc-d cDri aa.- i-ri t-lie-- OcCri FSAR, te a i-e axaiab-L k -ic-hea i : ~e-mc> \\7a1 2a p a Czily cf t~aP, 2 Cr~~ URBL ' -- at
- a. gi-%-E-ri ine ia d
i -ba. s e. ci C) ri t h e. s iinp t zn.ia.tt. a L E £ ki c.
- s -iirnm e c a.L p -a c-i y
(D E tL Ti e. c C 1D <D -f Ifric lD t-ie. a.1wab pc~we.1 ea:
- e.
i de.zic ~.~ed tc c iper ~ .fc~
- h.
d~ zi}}