ML16256A676
| ML16256A676 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse, Oconee, Arkansas Nuclear, Rancho Seco, Midland, Bellefonte, 05000000, Washington Public Power Supply System, Crane |
| Issue date: | 10/20/1983 |
| From: | Kadambi P Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| GL-83-28, NUDOCS 8310310489 | |
| Download: ML16256A676 (13) | |
Text
UNITED STATES NUCLE'AR RI GULATORY COMMISSION WASHINGTON, D. C. 20555 Docket Nos. 50-289 269/ 70/287/312/
(z 329/M/346/438/460
SUBJECT:
SUMMARY
OF MEETING WITH BABCOCK & WILCOX REACTORS OWNERS GROUP REPRESENTATIVES TO DISCUSS DEFENSE AGAINST ATWS A meeting was held on August 26, 1983 to discuss implementation of Generic Letter 83-28 and the proposed ATWS Rule for B&W plants.
The list of attendees is attached as Enclosure 1. The viewgraphs used by the B&W Owners Group (BWOG) representatives are attached as Enclosure 2.
DISCUSSION:
The BWOO representatives described to NRC staff the approach being proposed for various B&W reactors.to comply with the requirements expected for defense against ATWS.
It was mentioned that the purpose of the presentation was not to obtain a formal staff concurrence, but to obtain technical feedback to help further develop the proposed concepts. At the level of detail involved in the presentation, the staff found the proposed changes to be generally acceptable.
The main concern raised was related to the independence of the diverse scram from the existing scram system.
The staff was favorably impressed with the stated objectives of the trip breaker reliability monitoring program.
Questions on Generic Letter 83-28 regarding vendor interface documentation and on-line functional testing were answered by the staff so as to clarify the intent of the requirements.
Prasad Kadambi, Project Manager Operating Reactors Branch #4 Division of Licensing cc:
See next page 83103104EW 831020 PDR ADOCK 05000269 P
PDR OFFICEO........................
SURNAME~
ISPS/8 DATE) 02 8
DATO.8.....................
0
/.....
NRC FORM 318(110/80) NRCM 0240 OFFICIAL RECORD COPY
- U.S.
GPO 1983-400-247
MEETING
SUMMARY
DISTRIBUTION Licensee:
- Copies also sent to those people on service (cc) list for subject plant(s).
Docket File NRC PDR L POR ORB#4 Rdg Project Manager PADAMB I JStolz aGrimes (Emerg.
Preparedness only)
OELD NSIC ELJordan, IE JMITaylor, IE ACRS (10)
NRC Meeting
Participants:
0HARLES GRAVES RAINI SHERO;J C. E, Ross i FAUST RDSA Tom ALEXION
- IAI ORWSTEIN Arr CHRAIAL Tom DIIIIN G DAVE YATT.
PAUL L0EHIERT RbBERT WRIGHT NRC STAFF - BWOG MWNAGEMEIT AUGUST 2b, 1983 DENNIS L TERRILL FLA POWER CORP, W. NORM N RILLAMAN B
IONAP H. STEVENS B M BB LvZINNA BW WILLIAM T. CRADDOCK ARKANSAS POWER & LIGHT CO.
bBERT GiL DUKE POWER JERRY DELEZENSKI GPU NUCLEAR OBERT IDEHLER SMUD RN LANCASTER WYLE LABS CHARLES GRAVEs NRR/DSI/RSE 4, H. TAYLOR B&w DRAIN SHERON[
NRC/.DSB JoHN PENDLEBURY GENERAL ELECTRIC LYNN CONNOR THE NRC CALENDAR ED MURPHY W
C. E, Rossi NRC/DSI/ICS3 FAUST RDSA NRC/UDSI/ICSB TOM ALEXION NRC/DL/ORAB HAI ORNSTEIN NR/EOD PIATT CHIRAMAL NRC/AEOD MIIKE FERNES CPC0 MARCO %P ICCHIONI DC JOSEPH D. LACHENMAYER GPU NUCLEAR TED Bnos AP&L RICHARD BARNES AP&L TOM DUNJNING NRC/ICSB hbN DURMAN B&W DAVE PYATT NRCRES PAUL 0EHNERT NRC/ACRS RDBERT WRIGHT NRC/NRR/DEE/EQB I. P. KADAMBI NRC/NRRDL B&W OWNERS GROUP ATWS COMMITTEE/NRC MEETING AUGUST 26. 1983 AGENDA I. CONCEPTUAL DESIGNS FOR DIVERSE SCRAM SYSTEM II. REACTOR TRIP BREAK RELIABILITY MONITORING PROGRAM III.
GENERIC LETTER QUESTIONS 2.2 4.5.3
177 ATWS EVENTS LOMFW Ps LOOP (LUMFW) 3200 Psi BORON DILUTION
<2500 LOSS OF PRIMARY FLOW r2500 INACTIVE PRIMARY LOOP STARTUP
<2500 LOSS OF LOAD (TT)
<2500 LOAD INCREASE
<2500 PRIMARY SYSTEM DEPRESSURIZATION
<2500 EXCESSIVE COOLDOWN
<2500
PREJA'/lNARY DIVERSE SCRAM SYSTEM EFIC BASED ARTS -A EF C _ A (OSS)
Ii FLOS TRIFP T
RIP SEE NOTE I'IALL ALL WFP TRIP F
-ALP PP (BYPASSED BELOW 20)
TRIP
>20 TI 1UB8 IRIP BOP SG LEVEL u I URS TP TRIP SS PRESSURE NNI
__PRES ALL RCP TRIP RPS - A-a ALL RTRI RS PASSSUEEOSR10S TRIP TURBINE UTP U.BI
>10START Afl A EFIC-0 Pta()OVER CROCS1/
2 IRIP SCR-C TRRIP S
RC START ECCI-A NCPRI BCIth RPS HcpRIP OI LIRC/
apTRI TRI 1 BPESURE PESAAO NOIE:
61d 11 H fIC TRIPS NEEDED FOR ATWS WILL HE USED FOR NNI PRNESS LILI(hat HLACIUR THIP &TURBINE THIP.
IRIP
EFIC BASED ARTS - A TURBINE FW FLOW IR PN I
POWER (0)
>20 MFP BYPASS BELOW 20%
SG LEVEL S
- >0 --BY8PASS BELOW 10%
RI TEP TURINE RI
& U N TP STARI AFg-A
>10 I I CROCS I
EOVER L
POWE (9)POWER NI~~ TRIP E
~~TRIP SCRS SATfc pcP RIP/RCP AC BIR ADI TA A FS NLO 8 REPTRP RI
-TRIP UV2/
-fSAAO OTHER RPS-A TRIPS NNI RCPRSSR tEI PREAS(DSFS)
RPS1TR PRI SEEL NOTE c8 a
TRI SSm RO RESUE.PRES SFA E :NNDITRIP DIVERSE REACTOR TRIP & TURBINE TRIP.
I
P~J AlMINARY OIVERSE SCRAM SYSTEM EFW CONTROLS BASED ARTS -
A EFW CONTROLS -
A (OSS)
MFLLPMP TRIPALL TRIP TRIP iUB Iu~bItjE TRIP 1171ill PRESSURE SOP PRESS TRIPRSP RPS -A POsER (9)
M K
-- IRI I
.STARI EFW A AC BKR C TRIP SI TRIP SCRS TP SP[R I
STR S RPS-A~--
Eli CONROL C
RP8H1
DIVERSE SCRAM SYSTEM ARTS BASED RPS-A ARTS - A (DSS)
ALL MFP TRIP RC PRESSURE EMU CHI RC RPS-B AC BKR1 Rps-C 2/4PRESS RPS-a TRIP ST RPS-B
. START AFW-A AC BKR C RPS-C TRIP UV
-.ARTS-C TR4iP TURBINE
-;[TRIP ST RPS-0 TRIP UV ARTS-0 PTRIPST TRIP SCRS*
SCR-D TRIP SCRS
PROPOSED RFACTOR TRIP BREAKER RELIABILITY MONITORING PROGRAM OBJECTIVE:
MONITOR KEY BREAKER PARAMETERS TO IDENTIFY PRECURSORS TO PROBLEMS WEAR RELATED TIME DEPENDENT MAINTENANCE ENVIRONMENTAL
AFRUAH:
PHASE. I (APf-'OX. 2 YRS)
CENTRAL COLLECTION AND EVALUATION OF DATA o
CENTRALIZED DATA COLLECTION o
EVALUATE DATA o
DEVELOPE TRENDS o
DATA ANALYSIS BY COMPILER UTILITIES OWNERS GROUP
CONCLUSIONS OF PHASE I EVALUATION o
PREVENTIVE MAINTENANCE FREQUENCY o
MAINTENANCE PRACTICES 0
ENVIRONMENTAL EFFECTS o
PREDICTIVE MAINTENANCE
PHASL 11 (LUNG-iLR11)
IMPLEMENTATION OF PREDICTIVE MAINTENANCE PROGRAM CONTINUED DATA ACCUMULATION AND EVALUATION BY INDIVIDUAL UTILITIES,