ML20203H218

Summary of 860205 Meeting W/B&W Owners Group in Bethesda,Md Re B&W Owners Group Ongoing Programs & Activities & 850609 & 1226 Transients at Davis Besse & Rancho Seco,Respectively. Attendance List & Handout Incl

ML20203H218
Person / Time
Site:	Davis Besse, Rancho Seco, 05000000
Issue date:	04/14/1986
From:	Paulson W Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
TAC-60462, NUDOCS 8604290453
Download: ML20203H218 (75)

Text

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LICENSEE: B&W Owners G; oup

SUMMARY

OF FEBRUARY 5, 1986 NEETING WITH THE B&W OWNERS GROUP (B&WOG)

On February 5,1986 the staff met with representatives of the B&WOG in Bethesda, Maryland. During this meeting, the B&WOG (1) discussed their on-going programs and activities; (2) provided comments on the January 24, 1986 letter from the Acting E00 to the B&WOG regarding B&W reactors; and (3) discussed the B&WOG responses to the June 9, 1985 Davis Besse transient and the December 26, 1985 Rancho Seco transient. Enclosure 1 is a list of attendees. Enclosure 2 is a copy of the material presented by B&WOG at the meeting.

The owner's groups sumarized ongoing programs being addressed by their committees, with emphasis on the transient assessment program. During the i

1981-1985 time frame, over 200 separate trips / transients were evaluated t

and the results distributed to B&WOG members. During this period, trip prevention has been emphasized; the owners group indicated that in the current program, post trip response will be given greater emphasis.

The owners group indicated that their primary objectives are to define and implement actions that can contribute to the safe, reliable, and economical operation of B&W NSSS plants. The major programs to satisfy the B&WOG objectives are:

- Trip reduction and transient response improvement

- Availability improvement Compliance with regulatory requirements and commitments

- Economic improvement Other (additional programs may be required)

In concluding this portion of the meeting, the B&WOG indicated that their emphasis on trip reduction has been effective; the trip rate for B&W plants over the past two years has been below the PWR average. The owners group intends to brief the NRC staff on details of the Integrated Plan for Trip Reduction and Transient Response Improvement in July 1986. The owners group provided the staff with single copies of the reports listed in enclosure 3.

These reports are too voluminous to include in this meeting summary.

The B&WOG then provided comments on the Acting ED0's letter of January 24, l

1986 which 5tated that the staff intends to reassess the overall safety of B&W plants. The owners summary comments on the letter were as follows:

1.

It is not necessary to undertake a broadbased design comparison between PWR's with RSG's and OTSG's. The reasons for their different performance characteristics are understood.

(fiY bk B604290453 860414 PDR ADOCK 05000312 S

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.,. 2.

It is practical and desirable to improve the transient ~

response on the B&W plants. The B&WOG intends to take further action to do so.

3.

Recognizing the valid concern expressed in the NRC letter, the B&WOG is willing to work with the NRC and in fact lead this program. The owners group will make availabe the data base of information related to concerns and pursue any appropriate actions through scheduled action plans.

The staff indicated that it would be appropriate for the B&W0G to take the lead in this program. The staff will review and observe the progress of the program and identify concerns as appropriate. The owners group stated that they will provide a written response to the January 24, 1986 letter and will provide a commitment that the B&WOG will take the lead.

In the afternoon session, the Owners groups discussed their response to the June 9, 1985 Davis Besse transient and the December 26, 1985 Rancho Seco transient. The B&WOG formed a task force following the Davis Besse transient and' developed an action plan to address issues identified in the Incident Investigation Team's report (NUREG-1154), Toledo Edison Company's course of action plan, and the NRC August 14, 1985 letter to Toledo Edison Company.

The owners group action plan has 14 items. The B&WOG plan was submitted to the NRC by letters dated December 13, 1985. The enclosed handout summarizes o

the progress to date. The final task force report is scheduled to be issued June 30, 1986. The B&WOG objectives in responding to the Rancho Seco transient are to identify generic and plant specific implications of the transient, communicate these to the B&WOG members and, where appropriate, recommend programs or actions to address the concerns identified.

Planned actions are shown in the enclosed handout.

(> I Walter Paulson, Project Manager PWR Project Directorate #6 Division of PWR-Licensing-B

Enclosures:

As Stated PEQ WF AbMon;dd 4//f/86

MEETING

SUMMARY

DISTRIBUTION Licensee: B&W Owners Group

[ ket k N H L,,

PUK L POR PBD-6 Rdg OELD EJordan BGrimes ACRS-10 NRC Participants WPaulson JCrews, R:V GKalman SMiner MWangler GLPlumlee, WRegan CMiller JThoma NLauben LKelly DAllison

-IAhmed HSilver JKopeck GSchwenk DEisenhut DCrutchfield RKendall KSeyfrit l

JStolz RVollmer CThomas TMarsh JCalvo RDorman CMcCracken FSchroeder AJSzukiewicz RJones HNicolaras RWeller LReyes, R:III AGibson, R:II GVissing 0Parr JWermiel RLee EJordan BSheron RWright FMiraglia

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ATTENDANCE LIST

- FEBRUARY 5,1986 MEETING B&W OWNERS GROUP AND NRC STAFF -

NAME AFFILIATION-W. Paulson

'NRC/NRR J.L. Crews-NRC/ Region 1/

G.'Kalman

~ NRC/NRR S. Miner M. Wangler NRC/NRR-NRC/NRR G.L. Plumlee, NRC/NRR LW.H. Regan NRC/NRR

,C. L. Miller:

NRC/NRR J. O. Thoma NRC/NRR/PB#6 Norm Lauben NRC/NRR/PWR-B/RSB L. Kelly.

NRC/NRR/PBD-6' L.A. Haack

'TVA G.C.'Schieck B&W

Eve Fotopoulos Serch Licensing, Bechtel

-Dennis-Allison NRC/IE

'I.:Abmed NRC/NRR/PWR-B/PEICSB li.-. Silver -

NRC/NRR/PB-B J.' Kopeck NRC/PA0 K. Sieving

. Consultant E.R. Schmidt NUS E.C. Simpson -

Florida Power Corp.-

Neal Rutherford.

Duke Power Co.

'Hal B. Tucker Duke Power Co.

G.A. Schwenk NRC/NRR/PWR-B/RSB Joe Williams Toleodo Edison David Humenansky OCM/Zech-Darrell Eisenhut NRC/NRR Dennis M. Crutchfield NRC/NRR/PWR-B Rick Kendall' NRC/PWR-B/PEICSB Karl Seyfrit; NRC/AEOD John F. Stolz NRC/PWR-B Richard H. Vollmer

'NRC/IE J. Ted Enos-Arkansas Power & Light R.W. Ganthner B&W Cecil Thomas NRC/PWR-B/RSB L.B.(Tad) Marsh NRC/PWR-B/RSB

~ Jose A. Calvo NRC/PWR-8/PEICSB 5

p%

9

.a Cont.

.hAME-AFFILIATION Ron Dorman~

NRC/PWR-8/RSB Chris Doyel B&W Cal Goslow INPO Conrad McCracken NRC/PDB#6 Frank Schroeder' NRC/PWR-B A.J.1Szukiewicz NRC/DSR0/EIB Robert Jones.

NRC/PWR-B/RSB

~ Helen Nicolaras NRC/PWR-B Rick Weller.

NRC/PWR-B/PBD#6' Luis Reyes NRC Region III-Albert-Gibson.

NRC Region II

'JJ (Jim) Ritts TVA Lynn Connor.-

Doc Search Associates

' Dale E. James Arkansas Power & Light

' John Bohart B&W

-Charlie Pryor B&W Jim Taylor _

B&W James Langenbach GPU Nuclear Ron Rodriguez SMUD C. Brinkman GE Guy S. Vissing NRC/NRR Andy Thompson Duke Power Olan Parr.

NRR/PWR-B/PEICSB J.S.~Wermiel NRR/PWR-B/PEICSB Mark Beaumont Westinghouse Richard Lee NRC/RES/DAE/RSRB Ed Jordan NRC/IE DEPER Brian Sheron NRR/DSR0 Margaret Ryan McGraw Hill T.G. Broughton GPU Nuclear R.F. Wilson GPU Nuclear Robert Wright NRR/PWR-B Frank Miraglia.

NRR/PWR-B i

J.H.' Taylor B&W i

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NRC. MEETING TO REVIEW B&WOG PROGRAMS AND ACTIVITIES t

FEBRUARY 5,1986 BETHESDA, MARYLAND A

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' AGENDA 10:00 AM i.

1 1.

Introduction and review of B&W Owners Group organization and purpose l

11.

Representative On-going B&WOG Programs 111.

Evolution of Transient Assessment Program IV.

Performance Trending

- Trip Distribution l-

- Cause Distribution

- Status of On-going Programs

- Transient Response j

- Key Components and Controls Effecting Response L

V.

1981 - 85 Overview of TAP VI.

Refocus of B&WOG Management Activities Vll.

Comments Regarding NRC Letter of 1/24/86 to B&WOG

~

1:30 PM l.

B&WOG response to the 6/9/85 Davis Besse Transient II.

B&WOG response to the 12/26/85 Rancho Seco Transient l-

e t'

i I.

B&W OWNERS GROUP CHARTER

1. Purpose

- Identify problems and solutions

- Achieve high plant availability

- Improve safety

- Reduce costs

2. Objectives A. Improve safety and availability B. Identify and solve issues C. Timely consensus D. Communicate with NRC.

E. Communicate with other industry organizations F. Communicate among members t

G. Manage cost and schedules on generic issues

3. Membership

- Utilities

- B&W l

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II.

REPRESENTATIVE ONGOING B&WOG PROGRAMS BY COMMITTEE ANALYSIS

- RELAPS Benchmarks

- Technical Bases for EOP's AVAILABILITY

- Forced Outage Reduction

- Reactor Trip Breaker Reliability

- Feedwater Pump Trip Reduction

- Main Turbine Trip Reduction CORE PERFORMANCE

- Fuel Margin improvement

- Incore Detector improvement MATERIALS

- Reactor Vessel Materials Program

- Bolting investigations

- Fluence Measurement I

l

1 L

REPRESENTATIVE ONGOING B&WOG PROGRAMS (CONTINUED)

NDE

- Improved techniques / procedures for RV and OTSG NDE OPERATOR SUPPORT

- ATOG program

- Plant Limits and Precautions Update STEAM GENERATOR

- Cleaning, sleeving, plugging, and analyses TECH SPECS

- Tech Spec clarification / simplification l

LIFE EXTENSION l

- Comprehensive Plan Development

- Transient Logging Guidelines ISI

- Integral Systems Testing - MIST TRANSIENT ASSESSMENT

- High Pressure Trip Setpoint Change

- Anticipatory Reactor Trip Setpoint Change

- ICS Input Failures and System Features

Ill.

EVOLUTION OF TRANSIENT ASSESSMENT PROGRAM 1980 Program initiated Initial purpose: information exchange Approach: report prepared for every trip; distributed to all member utilities; each report contained improvement recommendations for consideration Annual summary prepared 1983 Program given greater emphasis; i

Transie.nt Assessment Committee formed Committee began evaluation of trends Availability Committee Formed OG programs conceptualized, prioritized and started to resolve the generic causes of trips.

1986 Trip Reduction and Transient Response l

Improvement Program i

FROM 1981 B& WOC ANNUAL TAP REPORT Figure 1 Evaluating Plant Transients 9

fagg nipinescas matvan 3g3:3g, i

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TAP POST TRIP PERFORMANCE REVIEW

- o Utilize 5 ATOG stability parameters

1.. Reactivity

- Short term with rods

- Long term with boron

2. RCS Pressure /Temnerature

- PORV not challenged, HPl not initiated and Pressure / Temperature relationship stays within post-trip window

3. RCS Inventory Pressurizer level stays on scale

4. OTSG Pressure Post trip pressure stabilizes at normal value l

of 1010 psig l

5. OTSG Inventory Level maintained in prescribed range l

l l

m FROM 1983 B&WOG ANNOAL REPORT TABLE 7.1 TRANSIENT ASSESSMENT COMITTEE RANKING OF REACTOR TRIP REDUCTION CONCEPTS Concept Ranking Raise Setpoint for Anticipatory Trip on Turbine' Trip 1

Reduce Turbine Trips Leading to Reactor Trips 2

Raise Setpoint for Reactor Trip on High Pressure 3

Re-evaluate Actions of the Integrated Control System 4

(ICS) (such as runback rates and target levels)

Which Contribute to Reactor Trips Reduce Reactor Trips Due to ICS Input Failures 5

Re-establish Original PORV and Reactor Trip Setpoint Relationship 6

Reduce Feedwater Pump Trips That Lead to Reactor Trips 7

Improve Definition of Reactor Trip Setpoint Margin to 8

Identify and Remove Any Excess Conservatism Reduce Reactor Trips Due to Personnel Error 9

Improve Oparator's Ability to Control the Plant in the Manual Mode 10 Reduce Reactor Trips Caused by the Flux / Delta Flux / Flow Function 11 Identify Cause and Corrective Action for Failure of Steam 12 Safety Valves to Reseat

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PERFORMANCE TRENDING B&WOG FIVE YEAR TRIP AND TRANSIENT PERFORMANCE

SUMMARY

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.l TRIP TOTALS FOR B&W PLANTS

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• TMI-1 ' DATA EXCLUDED

FACTORS CONTRIBUTING TO 1985 TRIP PERFORMANCE o Five refueling outage startups occurred in 1985.

Seven (7) trips within one week of startup occurred.

o There was an increase in MFW Pump trip events in 1985. Twelve (12) resulted in reactor trips due to operator errors, maintenance errors, power and

~

controls problems and unknown reasons.

o MFW upsets caused by ICS input failures / problems, MFW control problems, and system design changes resulted in eight (8) reactor trips.

o Turbine related failures / problems resulted.in nine (9) reactor trips. Five (5) were EHC-related.

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Figure 1 Evaluating Plant Transients M

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i B&WOG TRIP AND TRANSIENT FlVE YEAR PERFORMANCE

SUMMARY

RPS TRIP DISTRIBUTION 1921 1912 1913.

19.81 1915.

Hi RCS Pr 15 12 14 7

18 Lo RCS Pr 3

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B&WOG TRIP AND TRANSIENT FIVE YEAR PERFORMANCE

SUMMARY

ANTICIPATORY TRIP DISTRIBUTION 1981 1982 1983 1984 1985 i

Loss of turb 12 15 12 4

3 i

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Loss of MFW 2

1 3

4 5

l SFRCS 1

0 2

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B&WOG TRIP AND TRANSIENT FIVE YEAR PERFORMANCE

SUMMARY

INITIATION CAUSE DISTRIBUTION 19A1 1912 1913.

1911 1911 Elec. power 10 10 13 6

5 l

la C 11 20 21 15 11 Turbine 14 22 11 4

9 Feedwater 10 6

17 9

20 Operations 10 5

6 1

7 Surv/ Testing 4

10 5

3 4

l Maintenance 5

8 5

4 4

l-t Other 2

8 0

0 0

V. STATUS OF ONGOING PROGRAMS ISSUE STATUS 1.

Raise Setpoint for Antici-Topical Report submitted to NRC patory trip on turbine trip for review on 11/4/85 2.

Reduce turbine trips Draft report issued to Avail-ability Committee (11/8/85) 3.

Raise setpoint for reactor Topical Report submitted to NRC on trip high pressure for review on 11/8/85 4.

Reevaluate ICS control Draft final report due to be issued

& Targe(t levels) which actions runback rates to Transient Assessment Committee by 2/28/86 contribute to reactor trips 5.

Reduce reactor trips due Draft final report due to be issued to ICS input failures to Transient Assessment Committee by 2/28/86 6.

Develop, OG position on Draft issues Management Briefing post trip high pressure Sheet preparsd for Transient control Assessment Comm,ttee on 12/3/85 i

7.

Reduce feedwater pump Final report issued by Availability trips Committee on 1/10/8u 8.

Improve definition of Deleted in favor of other more reactor trip setpoint specific actions.

margin to identify and l

remove excess -conservatism 9.

Reduce reactor trips Final report issued to Transient due to personnel errors Assessment Committee, February 1985 i

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(CONTINUED)

10. Improve opera' tor's ability 'e issue to be subinitted to the to control the plant in th Operator Support Committee for manual mode evaluation and recommendation.

No schedule established

11. Reduce reactor trips Deleted.

No action warranted due i

caused by the flux / delta to trend change flux / flow function

12. Improve the operability of Deleted due to actions taken on automatic control systems issues 2 4, 5 and 7 and plant specific a, ctions.

13. Identify cause and Identified as an industry-wide corrective action problem. Availability Committee for delayed reseat is developing plan and schedule.

~

of steam safety i

valves

14. Evaluate relationship Transient Assessment Committee i

between trios occurring defined program in December 1985 within 30 days of i

previous trip

15. Identify causes and Transient Assessment Committee corrective actions for trips defined program in December 1985 occurrin within 30 days after regueling outages

16. Define Maintenance Program issue identified by Transient for ICS and Integrated Assessment Committee, Dec 1985.

Tuning of ICS and FW components I

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STATUS OF ONGOING PROGRAMS ISSUE SCHEDULE 1984 1985 1986 1987 1.

Raise Setpoint for Antici-patory trip on turbine trip x

2.

Reduce turbine trips x

3.

Raise setpoint for reactor x

trip on high pressure

4. Re-evaluate ICS control x

actions (runback rates

& Target levels) which contribute to reactor trips

5. Reduce reactor trips due x

to ICS input failures 6.

Develop OG position on high pressure control 7.

Reduce feedwater pump tnps 8.

Improve definition of Replaced by reactor tnp setpoint other a lctions margin to identify and remove excess conserva-tism 9.

Reduce reactor trips x

due to personnel errors r

I

l STATUS OF ONGOING PROGRAMS (CONTINUED)

ISSUE SCHEDULE 1984 1985 1986 1987

10. Improve operator's ability

. - - -y 1

to control the plant in the manual mode

11. Reduce reactor trip / delta s

Cancelled caused by the flux ifiux/ flow function

12. Improve,the operability of Replaced by automatic control systems other act,ons i

l

13. Identify, cause,and x- ---

I corrective action for delayed reseat of steam safety valves l

14. Evaluate relationship X

X between trips occurring l

with,in 30 days of l

previous tnp

15. Identify, causes and x

x corrective actions for trips occurring within 30 days after refueling outages

16. Define Maintenance Program

)

for ICS and Integrated Tuning of ICS and FW a

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B&WOG TRIP AND TRANSIENT FIVE YEAR PERFORMANCE

SUMMARY

POST TRIP PERFORMANCE

• Stability YEAR Parameter 1981 1982 1983 1984 1985 Reactivity 0

0 0

0 0

RCS P/T 1

0 0

1 3

i RCS Inventory 17 1

5 1

5 OTSG Press.

21 24 20 13 18 I

l OTSG Invent.

23 20 13 7

6

• Number of occurrences parameter was outside desired range - some trips have multiple parameters outside desired range.

l l

I r,

KEY COMPONENTS & CONTROLS EFFECTING RESPONSE O

INVOLVES PRIMARILY TWO KEY PARAMETERS:

OTSG LEVEL 1

OTSG PRESSURE THESE PARAMETERS ARE IMPORTANT BECAUSE OF THE CLOSE COUPLING OF PRIMARY-SECONDARY HEAT TRANSFER IN THE B&W PLANTS.

f O

THESE PARAMETERS ARE AFFECTED BY A FEW KEY COMPONENTS AND CONTROLS MFW PUMPS --

MFW VALVES TB VALVES PLUS ASSOCIATED ICS,MFW, AD VALVES EFW INSTRUMENTS AND CONTROLS EFW PUMPS l

l EFW VALVES MSS VALVES -

THE PROBLEM INVOLVES SPECIFIC PORTIONS OF THE PLANTS.

e V.

B&WOG TRANSIENT ASSESSMENT PROGRAM 1981 - 85 OVERVIEW Over 200 separate trips / transients have b'een o

evaluated and results distributed to B&WOG members.

I Overall program is sound, is producing results.

o Trip prevention has. been emphasized.

o t

l I

Post trip response will be given greater emphasis.

o o

Performance has improved and should continue to do so

~

i

VI. REFOCUS OF B&WOG MANAGEMENT UTILITIES o

B&WOG primary objectives:

Define and implement actions I

that can contribute to the safe, reliable and economical operation of B&W NSSS plants.

Need to establish this objective around a few very o

focused major programs.

Major programs to satisfy B&WOG objective o

- Trip reduction and transient response improvement

- Availability improvement

- Compliance with regulatory requirements and commitments

- Economic improvement

- Other (additional programs may be required)

Establish an objective statement or goal for each o

major program Develop a detailed plan for each major program o

l 4

1 REFOCUS OF B&WOG MANAGEMENT ACTIVITIES (CONTINUED)

For each major program ongoing and new B&WOG work o

will be integrated into the program Detailed schedules will be developed, monitored and o

reported on for each major program at each Steering Committee and Executive Committee meeting All recommendations stemming from each major program o

will be tracked for implementation by each utility INPO performance indicators for the B&W plants will be o

monitored and reported at each Executive Committee l

meeting l

Keep NRC staff informed of major project milestone and o

progress of the program L

TRIP REDUCTION AND TRANSIENT RESPONSE IMPROVEMENT PROGRAM PROGRAM OBJECTIVE The objective of the B&W Owners Group Trip Reduction and Transient R:sponse improvement Program is to reduce the number of trips and transients on Owners Group plants and to ensure acceptable plant response during anticipated transients.

MEASUREMENT OF SUCCESS By the end of 1990 the average per plant trip frequency will be less th:n 2 per year.

Transient response, as defined in terms of measureable parameters, will ha monitored and actions will be taken to reduce the. number of post trip responses which exceed these parameters.

l

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TRIP REDUCTION AND TRANSIENT RESPONSE IMPROVEMENT PROGRAM DEVELOPMENT o

Review known initiations (root causes) for past trips and transients and factors adversely effecting transient response.

Review recommendations and lessons learned from past trips o

and transient responses.

Categorize and prioritize initiations, transient response o

problems, and recommendations to solve identified problems.

i Compare ongoing B&WOG work with the data obtained from o

the above steps to ensure all areas of sufficient priority are being addressed o

Develop an integrated plan and schedule of the B&WOG activities for the trip reduction and transient response improvement program identify separate utility and industry initiatives that would o

contribute to the goals of the program.

implement a tracking system for the recommendations stemming o

i from the program f

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B&W Owners Group Integrated Plan for Trio Rarketion and Transient N Increv&nt Date: 1/31/86 Affected

%ssible Ocupletion Next INFO Perforinance Proiect Ocannittee Scheduled Outout Mile =tese Indicator Oceanents 1.

MEW Punp Trip Availability 1/86 Report with Implement Unplanned screas Report i==M 1/10/86; next Reduction recomumenda-racrumanda-action is for imp.lenenta-tions to tions tion of applicabl(

use-reduce trips tions at eada plarsi 2.

Main 'ntrbine Availability 12/85 Report with Final Rept,rt Unplanned scrans Draft Report being reviewed Trip Reduc-rw-anda-by Utilities.

tion tions 3.

Transient Transient Cantinuing

-Reports on 1985 Annual Unplanned scrans Amual Sunanary Report due A m =mt A=aa=== ant each tran-Stannary May 1986.

Frgam sient Report

-Annual Suni-mary Report 4.

Raise Arming Transient 11/85 Topical NRC ?ER Unplanned Safety Topical Report submittM Setpoint for Annaaamant Report Systen Actuation 11/4/85 for NRC review.

Anticipatory Trip on 'ntr-bine Trip 5.

Raise High Transient 11/85 Topical NRC SER Unplanned Safety Topical Report sutanitted -

Pressure Assessment Report Systen Actuation 11/8/85 for NRC review.

Trip Set-point S

e

-u-

s B&W Owners GrouD Intearated Plan for TriD Mvtion and Transient T---umm Improvmt (continued)

Date:

1/31/86*

i

- A.

B&WOG Proiects (continued) t Affected Espcissible ocupletion Next INPO Performance Proiect Ocasdttee Scheduled Output Milestone Indicator Ocements 6.

Reevaluation Transient 3/86 Report with Final Report Unplanned scrans Final Report to be 1 - M of ICS Aaaaaamant rerv===nda-2/86.

Features

.tions 7.

Improve ICS Transient 1/86 Report with Final Report Unplanned scrans Final Report to be imami Nsipc - to Aanmaamant recomunenda-2/86.

Input Failures tions 8.

Main Steam Transient 1/87 Report with Define scope Unplanned safety Scope being defined for Safety Valve Aaaaaament recomumenda-systeun actuation early 1986 start.-

Problems tions 9.

Reduce Trips Transient 9/86 Report with Prrmaa_1 Unplanned scrams To start April 1986.-

After Re-Aaaaaanant recomunenda -

issue fueling tions

)

Outages

10. Instrunenta-IEC 9/86

-Report with Review Urplanned scrans Started.

j tion and.

reccmunenda-Transient control System tions Assessnent j

Inprovements

-Field Canadttee change Reports Package i

4

BEM Owners Group Intearated Plan for TriD Ra4 tion and Transient M x=e IAprwement (continued)

Date: 1/31/86

' A.

BEMOG Proiects (contimed)

Affected Respons ble ctmpletion Next INEO Performance Proiect casunittee Sdieduled Output Milestone Indicator Cuanents

'11. Root Cause 1154 Task 6/86 Guidelines Identify See 1154 TF Action Plan Determination Ibroe/

for Boot essentJa1 Iteum 1.

Transient Cause elesments Assamusant a

Fa w scun

12. Reduced MEW 1154 Task 5/86 Report with Plant site Unplanned scrass Ooonee site visit couplete.

Initiated Force rammunanda-visits Trips tions and findings D.

Plant Specific Proiects To be identified and included C.

Industry Proiects To be identified

'nd included a

s e

SCHEDULE OF FOLLOWUP ACTIVITIES Commitments made at RRG meeting January 8,1986 Executive Committee endorsement of redirection-effort -

completed January 16, 1986 Inform NRC of general concept of redirection -

February 5,1986 Provide information to NRC on project related to the trip l

l reduction and Transient Response improvement Program -

As available Steering Committee draft and approve details of integrated program - May 1986 Brief NRC on details of integrated Plan - July 1986 i

t VII.

CONCLUSIONS 1.

B&WOG PROGRAMS ARE VERY DIVERSE AND HAVE PRODUCED MANY VALUABLE RESULTS.

2.

THE TRANSIENT ASSESSMENT PROGRAM HAS PRODUCED A SUBSTANTIAL AMOUNT OF INFORMATION USEFUL IN PLANNING AND PRIORITIZING PERFORMANCE IMPROVEMENT PROJECTS.

i 3.

B&WOG EMPHASIS ON TRIP REDUCTION HAS BEEN EFFECTIVE THE. TRIP RATE FOR B&W PLANTS OVER THE PAST 2 YEARS HAS BEEN BELOW 'THE PWR-AVERAGE.

4.

BASIC PROGRAM IS SOUND AND FLEXIBLE.

A SHIFT IN EMPHASIS IS IN PROGRESS TO GIVE HIGHER PRIORITY TO TRANSIENT RESPONSE IMPROVEMENT.

5.

WITH THE SHIFT IN EMPHASIS OF B&WOG ACTIVITIES, MANY OF, THE CURRENT AND FUTURE PROJECTS - WILL AFFECT NON-SAFETY RELATED PORTIONS OF THE PLANT.

THE B&WOG l

INTENDS TO RELEASE MORE INFORMATION TO THE NRC REGARDING THESE ACTIVITIES AND INVITES NRC INPUT.

i

l CONCLUSIONS (continued)

L 6.

B&WOG BEGAN THE COLLECTIVE USE OF KEY PERFORMANCE

-PARAMETERS IN 1983; IN THE FUTURE THE USE OF OBJECTIVE PERFORMANCE PARAMETERS WILL BE FURTHER EXPANDED TO MONITOR PERFORMANCE AND PRIORITIZE WORK.

7.

TIME IS REQUIRED FOR THE EFFECTS OF CHANGES RESULTING ~ FROM THIS PROGRAM TO BE REFLECTED INTO IMPROVED PLANT PERFORMANCE.

I i

11 --

1

Vill COMMENTS REGARDING NRC LETTER OF JANUARY 24. 1986 TO B&WOG B&WOG HAS RECEIVED AND DISTRIBUTED o

THE 1/24/86 LETTER TO ALL MEMBER 1

UTILITIES.

B&WOG AGREES THAT INFORMATION o

AVAILABLE TO THEM MAKES IT LOGICAL FOR THEM TO SERVE IN A LEADERSHIP ROLE IN RESOLVING THE NRC'S CONCERN.

EXTENSIVE OPERATING EXPERIENCE ACCUMULATED BY B&WOG MEMBER UTILITIES.

THE DIFFERENCE BETWEEN NORMAL AND ABNORMAL PLANT BEHAVIOR IS UNDERSTOOD.

THE AREAS OF THE PLANT WHICH ARE CONTRIBUTING TO PERFORMANCE PROBLEMS ARE KNOWN; MUCH IS NON-SAFETY RELATED.

DEFINING THE PROBLEM

-TRIP FREQUENCY B&WOG TRIP RATE IS NOT A UNIQUE PROBLEM.

IT IS COMPARABLE TO INDUSTRY AVERAGE AND WILL CONTINUE TO DECREASE.

COMPLEXITY ON PLANTS EMPLOYING THE OTSG, e

PROBLEMS WITH POST-TRIP CONTROL OF TWO KEY PARAMETERS CAN LEAD MORE QUICKLY TO A COMPLEX TRANSIENT.

j i

l L

l l

l

DEFINING THE PROBLEM 0

INVOLVES PRIMARILY TWO KEY PARAMETERS:

c OTSG LEVEL OTSG PRLSSURE THESE PARAMETERS ARE IMPORTANT BECAUSE OF THE CLOSE COUPLING OF PRIMARY-SECONDARY HEAT TRANSFER IN THE B&W PLANTS.

4 0

THESE PARAMETERS ARE AFFECTED BY A FEW KEY COMPONENTS AND CONTROLS MFW PUMPS-MFW VALVES TB VALVES PLUS ASSOCIATED ICS,MFW, AD VALVES EFW INSTRUMENTS AND CONTROLS EFW PUMPS EFW VALVES r

MSS VALVES-e THE PROBLEM INVOLVES SPECIFIC PORTIONS OF THE PLANTS.

s 2.

4 s -

l h

e e

OUANTIFYING THE CONCERN O

FREQUENCY IS QUANTIFIABLE O

COMPLEXITY IS QUANTIFIABLE USING ATOG STABILITY FUNCTIONS 0

SEVERAL LEVELS OF COMPLEXITY CAN BE ESTABLISHED AND QUANTIFIED 0

IMPROVEMENT GOALS CAN BE ESTABLISHED FOR IMPROVED TRANSIENT RESPONSE 4

O TRENDING PROGRESS TOWARD GOALS IS FEASIBLE

~

l 0

AREAS NEEDING FURTHER ATTENTION CAN BE READILY IDENTIFIED.

I

--===============-==e-em--mee====em==a=-a-======-==-m..-.a.e..........

l THE POST TRIP RESPONSE CAN BE QUANTIFIED.

2 i

,L

s

SUMMARY

COMMENTS ON 1/24/86 LETTER 1.

IT IS NQI NECESSARY TO UNDERTAKE A BliOAD-BASED DESIGN COMPARISON BETWEEN PWR'S WITH RSG'S AND OTSG'S.

THE REASONS FOR THEIR DIFFERENT. PERFORMANCE CHARACTERISTICS ARE UNDERSTOOD.

2.

IT IS PRACTICAL AND DESIRABLE TO IMPROVE THE TRANSIENT RESPONSE ON THE B&W PLANTS.

THE B&WOG INTENDS TO TAKE FURTHER ACTION TO DO SO.

3.

RECOGNIZlNG THE VALID CONCERN EXPRESSED IN THE NRC LETTER, THE B&WOG IS WILLING TO WORK WITH THE NRC AND IN FACT LEAD THIS PROGRAM.

i WE WILL MAKE AVAILABLE THE DATA BASE OF INFORMATION RELATED TO CONCERNS AND PURSUE ANY APPROPRIATE ACTIONS THROUGH SCHEDULED ACTION PLANS.

N e

e

-r m

l B&W OWNERS GROUP t

i RESPONSE TO THE i

JUNE 9,1985 DAVIS BESSE TRANSIENT l

PRESENTATION TO NRC FEBRUARY 5,1986

)

i i

l l

l l

l

. [

CHRONOLOGY OF B&WOG ACTIONS IN RESPONSE ~ TO JUNE 9.1985 DAVIS-BESSE EVENT f

B&WOG EXECUTIVE COMMITTEE SEPTEMBER 12 DIRECTS FORMATION.0F A TASK FORCE TO DEFINE AND COORDINATE B&WOG ACTIONS IN RESPONSE TO THE EVENT.

ORGANIZATIONAL MEETING OF THE SEPTEMBER 25 B&WOG 1154 TASK FORCE.

ACTION PLAN CONCEPT DEVELOPED.

SECOND MEETING OF TASK FORCE.

OCTOBER 30 DRAFT ACTION PLAN COMPLETE.

MEETING WITH NRC TO REVIEW NOVEMBER 5 ACTION PLAN.

B&WOG 1154 TASK FORCE MEETING NOVEMBER 14 TO FINALIZE ACTION PLAN.

ACTION PLAN SUBMITTED TO NRC DECEMBER 13 AND DISTRIBUTED TO OWNERS GROUP.

1154 TASK FORCE MEETING TO JANUARY 15 l

REVIEW STATUS OF INITIAL ACTIONS UNDER PLAN.

l l

l

-_, - - -, _ _.. _. _ _ -... _ - _ _. _.... ~ -.. _ _ _. - _. _.. _ _ _. _ _ _ _ _ _ _ _. - _ _ _. -

l OBJECT.NES OF THE B&WOG 1154 TASK FORCE 1

L O

IMPROVE THE SAFETY AND AVAILABILITY OF THE B&W UNITS.THROUGH CLOSE EVALUATION AND IMPLEMENTATION OF - LESSONS LEARNED DURING THE JUNE 9 EVENT AT DAVIS-BESSE.

0 ESTABLISH A MECHANISM TO ENSURE STRONG COMMUNICATION BETWEEN ALL OF THE B&WOG UTILITIES REGARDING THE ISSUES AND CONCERNS IDENTIFIED DURING REVIEW OF THE DAVIS-BESSE EVENT.

ESTABLISH A HIGH LEVEL FORUM TO IDENTIFY, TRACK, o

AND ENSURE COMPLETION OF PLANT-SPECIFIC AND GENERIC RECOMMENDATIONS THAT RESULT FROM REVIEW OF THE DAVIS-BESSE EVENT.

OVERVIEW OF 1154 TASK FORCE ACTION PLAN i

0 DOCUMENTS REVIEWED TO DETERMINE ISSUE / CONCERNS:

- NUREG 1154 l

- TOLEDO EDISON's

" DAVIS-BESSE -

COURSE OF ACTION" PLAN

- AUGUST 14 DENTON LETTER TO TOLEDO EDISON 0

ISSUES / CONCERNS CATEGORIZED IN 4

LEVELS:

I

- NO ACTION NEEDED BY B&WOG

- COMMUNICATION NEEDED AMONG B&WOG MEMBERS

- B&WOG WILL MONITOR AND DOCUMENT PLANT-SPECIFIC RESOLUTION OF ISSUE

- B&WOG ACTION REQUIRED FOR RESOLUTION 4

0 RESULTING PLAN HAS 14 ITEMS.

EACH ITEM ADDRESSES:

~

- STATEMENT OF CONCERN AND OBJECTIVE

- IDENTIFICATION OF SPECIFIC ACTIONS

-- DESCRIPTION

-- RESPONSIBILITY l

-- SCHEDULE FOR COMPLETION i

0 STATUS:

INITIAL PLANT SPECIFIC REVIEWS COMPLETE AND LETTER REPORTS ON 11 ITEMS FORWARDED TO B&W.

B&W REVIEWING FOR COMPLETENESS, CONSISTENCY AND LEVEL OF DETAll AND IS DISTRIBUTING FOR 1154 TASK FORCE EVALUATION.

l P

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• ear # 9 r-*ggegy m> m W M N'+ -a w m gww%-.-.epw r+ t gwwy wwnwm w -g wrr-gg,, -g+.w t-w

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1154 TASK FORCE ACTION ITEMS IIEM TITLE SYNOPSIS

'1 ROOT CAUSE IMPROVE EFFECTIVENESS DETERMINATION OF CORRECTIVE ACTION BY BETTER ROOT CAUSE DETERMINATION. -

2 REVIEW OF IDENTIFY ANY SYSTEM RECOMMENDATIONS PERFORMANCE APPLICABLE TO OTHER B&WOG PLANTS FROM THE DAVIS-BESSEE SYSTEMS REVIEW.

3 RELIABILITY OF ENSURE THAT SELECTED SELECTED SAFETY SAFETY RELATED MOVs ARE VALVES ADEQUATELY MAINTAINED, TESTED, AND CHECKED.

4 REVIEW OF CONTROL CONFIRM ADEQUACY OF ROOM DESIGN REVIEW PLANT-SPECIFIC CRDR'S IMPROVEMENT PROGRAM RELATIVE TO THE LESSONS i

OF THE DAVIS-BESSE EVENT.

5 ROLE OF STA EXCHANGE INFORMATION ON THE AVAILABILITY AND ROLE OF THE STA AT EACH B&WOG PLANT.

\\

~

l

~~

~~-

1154 TASK FORCE ACTION ITEMS (CONTINUED) 1

]IEM TITLE SYNOPSIS 6

TURBINE BYPASS VALVE DETERMINE IF THERE ARE AND STEAM TRAP FAILURE GENERIC OR PLANT-SPECIFIC i

IMPLICATIONS FROM THE DAVIS-BESSE TBV AND STEAM TRAP FAILURES.

7 RELIABILITY OF PORV DETERMINE IF ADDITIONAL ACTIONS ARE NEEDED RELATIVE TO PORV RELIABILITY.

8 EVALUATION OF AFW REVIEW AFW SYSTEMS AT SYSTEM RELIABILITY OTHER B&W PLANTS TO DETERMINE IF ANY ' CHANGES ARE NECESSARY TO l

PRECLUDE THE PROBLEMS EXPERIENCED DURING THE DAVIS-BESSE EVENT.

9 REVIEW OF TRANSIENT DETERMINE THE ANALYSIS RESULTS APPLICABILITY OF THE TRANSIENT ANALYSIS PERFORMED ON THE DAVIS-BESSE TRANSIENT USING RELAP5 TO THE OTHER B&WOG PLANTS.

1154 TASK FORCE ACTION ITEMS (CONTINUED)

JIEM TITLE SYNOPSIS 10 ACTIONS RELATED DETERMINE IF THERE ARE TO SFRCS GENERIC OR PLANT-SPECIFIC IMPLICATIONS FROM.

CHANGES MADE TO THE SFRCS SYSTEM, RESULTING FROM THE DAVIS-BESSE EVENT, AND AFFECTING l

SYSTEMS PERFORMING SIMILAR FUNCTION AT OTHER B&WOG PLANTS.

11 EFFECT OF PHYSICAL DETERMINE IF THERE ARE SECURITY AND WAYS TO MAINTAIN ADMINISTRATIVE SECURITY AND PLANT RESTRICTIONS ON CONTROL WHILE ALLOWING OPERATIONS OPERATORS MORE TIMELY ACCESS TO EQUIPMENT DURING ACCIDENTS.

l 12 ACTIONS RELATED TO REVIEW OPERATIONAL OPERATING PROCEDURES PROBLEMS ENCOUNTERED AND TRAINING DURING THE DAVIS-BESSE EVENT TO DETERMINE IF THEY ARE APPLICABLE TO OTHER B&WQG PLANTS.

1.. -

...J.._.'.._L_L.".-

^ - ~ - ~ "

'~'

~

1154 TASK FORCE ACTION ITEMS (CONTINUED)

IIEM TITLE SYNOPSIS 13 ICS MODULE MAINTENANCE DETERMINE IF PLANT ICS MAINTENANCE PROCEDURES ARE ADEQUATE IN LIGHT OF DAVIS-BESSE EVENT.

14 REDUCE FEEDWATER REDUCE THE FREQUENCY OF INITIATED TRIPS PLANT TRIPS BY FOCUSING ON PREVENTION OF TRANSIENTS INITIATED BY FEEDWATER UPSETS.

O i

ITEMS OF SPECIAL GENERIC SIGNIFICANCE 1.

ROOT CAUSE DETERMINATION 3.

RELIABILITY. OF SELECTED SAFETY RELATED VALVES 14.

REDUCED FEEDWATER INITIATED TRIPS t

a l

1

~

J

?

m,,___-. _,._

1154 TASK FORCE ACTION PLAN ITEM i -

ROOT CAUSE DETERMINATION STATEMENT OF CONCERN:

ANALYSES OF EQUIPMENT FAILURES AND SYSTEM TRANSIENTS ARE NOT ALWAYS SUFFICIENT TO INITIATE APPROPRIATE CORRECTIVE ACTION TO PREVENT RECURRENCE.

OBJECTIVE:

TO IMPROVE ROOT CAUSE DETERMINATION AND THE EFFECTIVENESS OF CORRECTIVE ACTIONS TO REDUCE THE NUMBER OF PLANT TRIPS, AND THEREBY REDUCE THE CHALLENGES TO SAFETY SYSTEMS.

l l

,,,,.-.-w,.,---,-n.----

1154 TASK FORCE ACTION PLAN ITEM i -

ROOT CAUSE DETERMINATION (CONTINUED)

ACTION SCHEDULE STATUS 1.

PROVIDE DESCRIPTION OF 1/1/86 COMPLETE ROOT CAUSE DETERMINATION

& CORRECTION METHODS IN CURRENT USE.

2.

REVIEW ROOT CAUSE 2/1/86 COMPLETE DETERMINATION METHODS USED BY B&W OG MEMBERS.

l 3.

SOLICIT INPUT FROM INPO 2/1/86 COMPLETE REGARDING ROOT CAUSE DETERMINATION METHODS.

4.

IDENTIFY THE ESSENTIAL 5/1/86 ELEMENTS OF EFFECTIVE ROOT CAUSE DETERMINATION METHODS & PROVIDE GUIDANCE TO B&W OWNERS GROUP MEMBERS.

1--,

i I

i 1154 TASK FORCE ACTION PLAN ITEM 3 -

2 RELIABILITY OF SELECTED SAFETY RELATED VALVES STATEMENT OF CONCERN:

ADEQUACY OF MAINTENANCE, TESTING, AND OPERABILITY CHECK OF SELECTED MOTOR OPERATED SAFETY RELATED VALVES OBJECTIVE:

ENSURE THAT SELECTED MOTOR OPERATED SAFETY RELATED VALVES ARE CAPABLE OF PERFORMING THEIR SAFETY RELATED FUNCTIONS.

I l

t l

.:=...

1154 TASK FORCE ACTION PLAN ITEM 3 -

RELIABILITY OF SELECTED SAFETY RELATED VALV'ES (CONTINUED)

ACTIONS SCHEDULE STATUS

]

EACH UTILITY TO EVALUATE 1/15 COMPLETED ADEQUACY OF MAINTENANCE, TESTING & OPERABILITY CHECKS FOR MOTOR OPERATED HPl AND AFW INJECTION i

VALVES WHICH MUST STROKE TO PERFORM A SAFETY j

FUNCTION.

i REVIEW D-B COURSE OF ACTION 2/15 IN PROGRESS REPORT, TEST RESULTS, AND CORRECTIVE ACTIONS FOR GENERIC APPLICABILITY.

USING TED RECOMMENDATIONS 3/15 l

& RESULTS OF UTILITY REVIEWS, DEVELOP LIST OF RECOMMENDA-TIONS FOR GENERIC CONCERNS.

l B&WOG INITIATE DISCUSSION CONTINUING WITH OTHER OWNERS GROUPS

& INDUSTRY ORGANIZATIONS TO INVESTIGATE THE MAINTENANCE TESTING AND SETTING UP OF MOV's.

A A

'ee 1154 TASK FORCE ACTION PLAN ITEM 3 -

RELIABILITY OF SELECTED SAFETY RELATED VALVES (CONTINUED)

PLANNED ACTIONS 0

THE B&WOG IS SPONSORING A TWO-DAY WORKSHOP IN LATE FEBRUARY FOR REPRESENTATIVES OF B&WOG MEMBERS RESPONSIBLE FOR THE MAINTENANCE, TESTING, AND SET-UP OF MOV's.

THIS WORKSHOP WILL COVER:

ACTIONS TO-DATE ON THIS ITEM.

RECENT MOV RELATED PROBLEMS FOUND AT D-B.

INFORMATION EXCHANGE REGARDING IEB 85-03.

GENERAL INFORMATION EXCHANGE ON i

MAINTENANCE AND TESTING PRACTICES.

l i

.m.

_._____,..,m__.

1154 TASK FORCE ACTION PLAN ITEM 14 --

REDUCING FEEDWATER INITIATED TRIPS i

l STATEMENT OF CONCERN:

FEEDWATER TRANSIENTS RESULTING IN PLANT TRIPS ARE OCCURRING TOO FREQUENTLY.

OBJECTIVES:-

1.

REDUCE THE CHALLENGE TO SAFETY SYSTEMS BY FOCUSING ON PREVENTION OF FEEDWATER l

TRANSIENTS.

f 2.

IMPROVE AVAILABILITY OF B&WOG MEMBER PLANTS.

l

1154 TASK FORCE ACTION PLAN ITEM 14 -

REDUCING FEEDWATER INITIATED TRIPS i

(CONTINUED)

ACTION SCHEDULE STATUS

. REVIEW 1984 EXPERIENCE 5/86 IN PROGRESS ON FEEDWATER TRANSIENTS FOR ADEQUACY OF CORRECTIVE ACTIONS.

i 1

REASSESS THE SCOPE AND IN CONJUNCTION WITH PRIORITY OF EXISTING STEERING COMMITTEE B&WOG & UTILITY PROJECTS.

PLANNING PROCESS.

l CONSISTENT WITH OVER-TO BE DETERMINED l

ALL NUMARC SCRAM BY RESULTS OF REDUCTION GOALS &

ABOVE ITEMS.

BASED ON FINDINGS OF THE ABOVE ACTIONS, DEVELOP A PLAN FOR REDUCING SCRAMS CAUSED BY FEEDWATER TRANSIENTS.

1154 TASK FORCE ACTION PLAN ITEM 14 -

REDUCING FEEDWATER INITIATED TRIPS (CONTINUED)

ACTION PLAN DETAILS:

i A PHASED PROGRAM FOR MFW RELIABILITY EVALUATION HAS

(

BEEN INITIATED:

O CONSIFTS OF A GATHERING AND SHARING PROCESS USING l

SEQUENTIAL SITE VISITS FOLLOWED BY A REPORT AND DEBRIEFING MEETING AT THE CONCLUSION OF THE VISITS.

O ADVANCE QUESTIONNAIRE DISTRIBUTED JANUARY 22.

O FIRST PLANT VISIT COMPLETED: OTHERS TO FOLLOW AT ABOUT WEEKLY INTERVALS.

s O

WILL INVOLVE INTERVIEWS WITH MAINTENANCE AND MAINTENANCE ENGINEERING, OPERATORS AND ENGINEERING AT EACH B&WOG PLANTS.

O OBJECTIVES:

COMPILE AND SHARE DATA ON HOW THE FW SYSTEM i

AND SYSTEM PROBLEMS ARE HANDLED AT OTHER PLANTS.

I DEVELOP INSIGHTS INTO KEY ELEMENTS FOR SUCCESSFUL-FW SYSTEM OPERATION.

IDENTIFY GENERIC OR SPECIAL PLANT SPECIFIC PROBLEMS AND MODIFICATIONS OR IMPROVEMENTS WHICH ARE APPROPRIATE.

O SCHEDULED COMPLETION BY MAY 1986.

.m p

4

.,M b

e e

s 1154 TASK FORCE SCHEDULE -

MAJOR MILESTONES O

COMPLETION OF ALL TASK FORCE 5/23 ACTIONS AND ISSUANCE OF DRAFT REPORT.'-

O ISSUE FINAL TASK FORCE REPORT 6/30 O

PRESENTATION OF RESULTS 7/15 TO NRC.

l 1

4

SUMMARY

~

i t

O.

PROGRAM IS WELL UNDERWAY.

TASK ACTION PLAN HAS BEEN DEVELOPED, DISTRIBUTED AND IS BEING IMPLEMENTED ON SCHEDULE.

0 INITIAL PLANT SPECIFIC REVIEWS ARE COMPLETE AND INFORMATION EXCHANGE HAS BEGUN.

O AS THEY ARE IDENTIFIED, RESULTS FROM INDIVIDUAL ACTION PLAN ITEMS WILL BE FACTORED INTO THE PRIORITIZATION AND SCHEDULE FOR THE B&WOG

. INTEGRATED PLANNING PROCESS AND INDIVIDUAL UTILITY PLANS.

l L

r l

I

h B&W OWNERS GROUP j

RESPONSE TO THE DECEMBER 26,1985 RANCHO SECO TRANSIENT i

PRESENTATION TO NRC FEBRUARY 5,1986 t

e e 5

CHRONOLOGY OF B&WOG ACTIONS IN RESPONSE TO THE DECEMBER 26.1985 RANCHO SECO EVENT Individual Utility Action and Notification Dec.26

~

By Other B&WOG Members Dec.30,1985 RRG Activated by B&WOG Dec. 31,1985 RRG Telephone Conferences and Meeting Jan. 2 - Jan 7,1986 NRC/RRG Meeting Jan. 8,1986 B&WOG Steering Committee Developed Jan. 9,1986 List of Potential Action items B&WOG Executive Committee Concurred Jan.16,1986 With List of Potential Action items Materials Committee, Analysis Committee Jan. 22,1986 -

l&C Committee and Operator Support Present Committee review and development of detailed implementation schedules for items under their cognizance.

i i

I i

B&WOG.OB.lECTIVES. IN... RESPONDING TO _ RANCHO SECO IDENTIFY GENERIC AND PLANT-SPECIFIC IMPLICATIONS OF THE RANCHO SECO EVENT, COMMUNICATE THESE TO THEB&WOG MEMBERS AND, WHERE APPROPRIATE, RECOMMEND PROGRAMS OR ACTIONS TO ADDRESS THE CONCERNS IDENTIFIED.

i i

f l

i l

B&WOG PLANNED ACTIONS IN RESPONSE TO THE RANCHO SECO EVENT OF DECEMBER 26. 1985 SCHEDULE

1. Review training records to ensure operators February 5 or have had training in loss of ICS power.

prior to restart.

2. Perform confirmatory review of ATOG Technical May 23,1986 Basis Document to ensure that it adequately i

i addresses the transient that results from the loss of ICS/NNI power.

3. Review plant-specific emergency procedures May 23,1986 to confirm that they adequately address the i

symptoms and consequences associated with the transient that results from the loss of ICS/NNI power.

i

4. Review the results of any previous loss and March 31,1986 j

restoration of ICS/NNI tests conducted.

l Assess benefits of further testing.

Assure that results of testing are understood.

I

~

B&WOG PLANNED ACTIONS IN RESPONSE TO THE RANCHO SECO EVENT OF DECMEBER 26. 1985 (CONTINUED) i SCHEDULE i

5.

REVIEW PLANT-SPECIFIC TO BE DETERMINED FOR LESSONS LEARNED.

AFTER ITEM 4.

6.

FAMILIARIZE OPERATORS FEB. 5,1986 OR WITH THE EVENT.

PRIOR TO RESTART l

7.

REVIEW THE DETERMINA-MARCH 31,1986 TION OF THE BASIC (ROOT)

CAUSES OF FAILURE OF THE ICS POWER AT RANCHO SECO.

ASSESS

~THE NEED FOR FURTHER e

RELIABILITY IMPROVE-MENTS.

MAKE RECOMMEN-DATIONS FOR IMPROVEMENTS AS APPROPRIATE.

1 l

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i B&WOG PLANNED ACTIONS IN RESPONSE TO THE RANCHO SECO EVENT OF DECEMBER 26. 1985 L

(CONTINUED)

SCHEDULE 8.

Perform additional reviews when more information is available.

Include this information in the ongoing eval-untion of B&WOG programs priority and schedule.

To date the review has iden-l tified the following items:

A. Review the following reports and documents:

4/1/86

. - NRC ITT Report

-INPO SER

- Oak Ridge Report on A-47 for Oconee l

- Existing FMEAs on ICS.

- B&WOG PTS submittals

- Response to IEB-79-27 and 50.54 (f) response to 2/26/80 CR-3 event

- Toledo Edison recent review of ICS B. Review maintenance of ICS/NNI TBD C. Evaluate equipment modifications TBD

- FW startup valve position on loss of ICS power i

- TBV position on loss of ICS power (AP&L)

- MFW pump speed control on loss of ICS power (GPUN, TED) 5

- Review and develop a comparison for post a,nd i

planned ICS Modifications l

D. Review the assumptions made in ATOG regarding "

5/23/86

, availability and use of ICS and NNI controls i

and instrumentation i

E. Review current control room design to confirm TBD that it covers human factors aspects of the event l.

L

B&WOG PLANNED ACTIONS IN RESPONSE TO THE RANCHO SECO EVENT OF DECEMBER 26. 1985 (CONTINUED)

SCHEDULE 9.

On-going (Transient Assessment Committee)_ B&WOG programs to improve reliability of ICS A.

Re-evaluate ICS Control 2/28/86 actions which contribute (draft report) to reactor trips.

B.

Reduce reactor trips due 2/28/86 to ICS input failures.

(draft report) t I

t l

i e

...a i

CONCLUSIONS o

B&WOG ACTIONS TO DATE INDICATE THAT DUE TO PLANT DIFFERENCES, A TRANSIENT INITIATED BY LOSS OF POWER TO ICS, SUCH AS THE RANCHO SECO EVENT, AT ANY B&W PLANT OTHER THAN RANCHO SECO WOULD RESULT IN MUCH LESS SEVERE TEMPERATURE CHANGES.

t i

o THE RANCHO SECO TRANSIENT RESULTED IN i

IDENTIFICATION OF SEVERAL ITEMS DESERVING REVIEW BY THE B&WOG AND INDIVIDUAL UTILITIES.

THESE ITEMS INCLUDE:

l

-- OPERATIONS

-- RELIABILITY

-- PROCEDURES

-- MAINTENANCE

-- TRAINING

-- HUMAN FACTORS l

-- DESIGN o

FURTHER ACTIONS MAY BE IDENTIFIED AS A RESULT OF NEW INFORMATION STEMMING FROM FUTURE REVIEWS.

THESE WILL BE PRIORITIZED AND INTEGRATED INTO THE B&WOG TRIP REDUCTION AND TRANSIENT RESPONSE IMPROVEMENT PGORAM.

l ACTIONS HAVE BEGUN TO DEAL WITH THESE ITEMS ON I

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A GENERIC AND INDIVIDUAL UTILITY BASIS.

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-..._._____... _ _. _._. ~ -...,,_.

r-r f.,.

REPORTS PROVIDED BY THE B&WOG DURING THE FEBRUARY 5,1986 MEETING 1.

Transient Assessment Program, Operating Experience Sumary Report,

January-December 1981, B&W Document I.D. 12-1134570-00, 2.

Transient Assessment Program, Operating Experience Sumary Report, 1982, B&W Doc. I.D. 47-1142210-00.

3.

The B&W Owners Group Transient Assessment Program, Operating Experience Summary Report, January-December 1983.

4.

The B&W Owners Group Transient Assessment Program Operating Experience Sumary Report,1984, Doc. I.D. 47-1158723-00.

5.

The B&W Owners Group Availability Comittee, Main Feedwater Pump Trip

' Reduction Program Final Report 47-1159449-00.

6.

The B&W Owners Group Transient Assessment Program, Justification for Raising Setpoint for Reactor Trip on High Pressure, BAW-1890 September 198L.

7.

The B&W Owners Group Transient Assessment Program, Basis for Raising Arming Threshhold for Anticipatory Reactor Trip on Turbine Trip, BAW-1893, October 1985.

.