ML20133K589

Forwards Action List Providing Util Plan to Resolve Concerns Stemming from 851002 Transient,Per 851010-11 Meetings.Listed Commitments Scheduled for Completion Prior to Restart. Schedule for long-term Items Will Be Submitted by 851118

ML20133K589
Person / Time
Site:	Rancho Seco
Issue date:	10/14/1985
From:	Reinaldo Rodriguez SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Thompson H Office of Nuclear Reactor Regulation
References
RJR-85-514, TAC-59691, NUDOCS 8510220172
Download: ML20133K589 (13)

Text

r-3.uuo SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, Bor 15830, Sacramento, California 95013; (916) 452-3211 RJR 85-514 October 14, 1985 DIRECTOR OF NUCLEAR REACTOR REGULATION ATTENTION HUGH L THOMPSON JR DIRECTOR DIVISION OF LICENSING U S NUCLEAR REGULATORY COMMISSION WASHINGTON D C 20555 DOCKET 50-312 RANCHO SECO NUCLEAR GENERATING STATION UNIT NO. 1 PROGRAM PLAN TO RESOLVE ITEMS FROM TRANSIENT OF OCTOBER 2, 1985 In meetings between our staf fs on October 10 and 11,1985, the District agreed to provide the NRC additional information regarding the District's plans for the restart of Rancho Seco. The District has embarked on a methodical and detailed program to investigate and correct the causes associated with the transient of October 2, 1985. This exhaustive investigation revealed a number of actions the District will pursue both in the immediate and long term. The District has identified specific connitments scheduled for completion prior to criticality. The summary description and criteria used to satisfy these restart commitments are:

Description Criteria

1. MU/HPI Flow Balance Plant Review Connittee (PRC) confirms safety function is met.

2. Reactor Trip Report Approved by PRC and Plant Superintendent.

3. Root Cause Analysis Reviewed by Management Review Team.

4. Oil Levels on Safety Related Procedures and training completed Pumps for operators on maintenance of oil levels.

5. Endurance Test on Aux FW Pump Special Test Procedure results P-319 approved by Technical Support Superintendent.

6. Walkdowns of Selected Systems Verify valves in operating procedures.

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8510220172 851014 1 PDR ADOCK 05000312 S PDR

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ll Ah ELic TRic SYSIE M SERVING MORE THAN 600.000 fN THI HEART Of CALIFORNIA

e Hugh L. Thompson, Jr. Page 2 October 14, 1985 Description Criteria

7. Determine which Safety Related Complete documentation review, Pumps are designed with perform appropriate inspections, slinger rings, and report to Plant Manager.

8. Assure Settings of Secondary Complete in-place setpoint Plant Steam Controls / Reliefs verification on 2nd and 4th Point FW Heaters.

The attached Action List provides the District's overall plan to resolve concerns stenning from the October 2,1985, transient. The plan also includes the systematic programs the District is pursuing now and beyond restart as a result of its investigation into the causes of the trip and associated events. It is important to note that the Action List is a living document.

Except for the "startup" required items, the longer range actions will evolve further as the results of studies and analyses dictate. The District will submit to the NRC by November 18, 1985, the status of the short term actions and a schedule for completion of the long term items.

Finally, to answer some specific requests from members of the NRC staf f that visited Rancho Seco last week, the District offers the following:

A. Upon completion and approval, the District will supply, to the NRC Resident Inspector, the Post-Trip Report.

B. The District has determined that the Non-Nuclear Instrumentation and Integrated Control System (NNI/ICS) did not cause, nor were affected by, the transient.

C. The District will provide a summary report on its intended improvements to its preventive maintenance program for the secondary side of the

. plant. The District will submit this report by November 30, 1985.

D. The District has been unable to determine the cause of the feedwater Pump trip and will therefore instrument the pumps prior to startup to detect any trip signals which automatically reset.

If you have any questions concerning any of the above items, contact Jerry Delezenski of my staff.

b

\'N h R. J. RDDRIGUEZ y

t ASSISTANT GENERAL NANAGER NUCLEAR Attachment

LEGEN0: SU = Stcrtup Required LT = Lcng Term STATUS DATE 10-14-85 .

PE = Power Escalation OCTOBER 2, 1985 TRANSIENT TIME 1600 NA = Not Applicable ST = Short Ters - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ COMMENTS ETC.

I Post Trip Report J. Field SU In Progress NA Draf t completed. In. Review to be finalized 10/14.

II Root Cause Analysis S. Crunk SU In Progress NA Management Review Team Action 10/15.

III Aux FW ICS Control

a. Verify calibration of N. Brock SU Completed 104969, 104972 Completed 10/07/85 appropriate modules. 104973, 104974 104975

b. Reset of Aux FW Valves B. Spencer SU Training of NA Crews to be trained on IFWP Reset. 3 Crews before going onshift.

Completed

c. Revise procedures for B. Spencer SU Completed NA Temporary change to III.b. Operating Procedure A.51 done 10/13/85.

IV HPI "A" Inject Line flow indication

a. Write and perform J. Field SU Results NA Results to be approved Special Test Procedure. Approval 10/15.

Required

r 1 LEGEND: SU = Stcrtup Required LT = Long Term STATUS DATE 10-14-85 ,

PE = Power Escalation OCTOBER 2, 1985 TRANSIENT TIME 1600 NA = Not Applicable ST = Short Tem - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ CO M NTS ETC.

IV b. Perform calibration N. Brock SU Completed 105228 Completed 10/04/85.

check of FT-23807. Found OK.

c. Resolve flow anomaly and J. Field SU Requires S-5103 NCR assigned to D. Abbott.

prepare Sunnary Report. Disposition V Pegging Steam Controls

a. Detemine adequacy of J. Field SU In Progress, NA Nuclear Engineering pegging steam setpoints Due 10-14 (S. Rutter) Support and FW heater relief valve setpoints.

b. Verify setpoints of 2nd R. Lawrence SU . Completed 104541, 104544 All setpoints as per and 4th Point heater 104542, 104543 Process Standards, shell relief valves. 104562, 104563

c. Verify setpoints of all R. Lawrence PE Planning Will require use of hydro secondary system relief assist on valves without valves which could recent setpoint history.

cause rapid cooldowns/

other FW heater shell reliefs.

d. Determine appropriate R. Lawrence LT Do as part of PM program periodic test program upgrade.

(i.e., either PM or SP Program) and implement same for all secondary relief valves.

r- T LEGEND: SU = Startup Required LT = Long Ters -

STATUS DATE 10-14-85

• PE = Power Escalation OCTOBER 2, 1985 TRANSIENT TIME levo NA = Not Applicable ST = Short Term - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ COMMENTS ETC.

Y e. Resolve report of MSR J. Field SU Action NA Interviews with event Reliefs lifting af ter observers.

Rx/ Turbine trip.  ;

VI "A" Main Feedwater Pump seal water and controls

a. Repair linkage on N. Brock SU Completed 104965 Completed "immediate" controller. .

repairs 10/02/85.

In Progress 105378 Requires replacement with l proper pin.

b. Check common mode N. Brock LT Reviewing NA Looking for common mode failure possibility on relations to VI a.

controller linkage.  !

VII Main Feed Pump Trip Event

a. Write STP to dupitcate J. Field SU Being NA To be ready for Plant low vacuum condition. Written Review Committee approval, 10/15/85.

b. Install monitoring N. Brock SU Planning NA See X.a.

instrumentation.

c. Verify "as built" wiring C. Linkhart SU Completed 102722 Plant drawings accurately of "A" FWP trip circuits. show "as built" configuration.

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LEGEND: SU = Stcrtup Required LT = Long Tern STATUS DATE 10-14-85 .

PE = Power Escalation OCTOBER 2, 1985 TRANSIENT TIME 1600 NA = Not Applicable ST = Short Term - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ COMMENTS ETC.

VII d. Check setpoints of trip N. Brock PE Hold 102716, 102721 Four out of six completed.

devices. ~ 102718, 103272 (Remaining two require 102720, 103273 pumps to be run at minimum speed.)

e. Compile history of FW N. Brock ST In Progress NA pump control problems.

f. Check end play on main R. Lawrence SU Completed 102719 Acceptable.

shaft of "A" MFW Pump.

g. Obtain LO sample from R. Lawrence SU Completed 103269, 102719 Normal.

"A" and "B" MFW Pump and have analysis performed.

h. Verify "as built" wiring C. Linkhart SU Completed 105686 Acceptable; elementaries of "B" FWP trip circuits. (NCR Reg'd) are correct.

1. Install Trip Circuit C. Linkhart LT Preparing Requires pump out of Alann Lights. ECNs service.

VIII Main Condenser loss of Vacuum Event

a. Update drawings to R. Lawrence 50 Sent to SDC Design Change Notice in reflect "as built" 10-11-85 review process. Yellow conditions of MSR relief drawings must be in sealing steam. Control Room prior to Startup.

LEGEND: SU = Stortup Required LT = Long Tern STATUS DATE 10-14-85 ,

PE = Power Escalation OCTOBER ?._1985 TRANSIENT TIME 100u NA = Not Applicable ST = Short Ters - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ CODMENTS ETC.

VIII b. Revise procedure (s) to B. Spencer 50 Completed NA Temporary change to show MSR relief sealing Operating Procedure A.49 steam valves. written.

c. Determine whether B. Spencer SU In Progress NA sealing steam procedures ,

are adequate and usable.

d. Review / analyze perfom- J. Field LT Holding NA Long tem ites.

ance of the gland stems condenser.

e. Investigate when/why MSR B. Spencer SU In Progress NA sealing steam valve was closed.

f. Determine whether MSR R. Lawrence LT Continuing NA Review shows adequate Relief Sealing Steam for restart. Report in System works as designed. typing.

g. Initiate WR for rework R. Lawrence LT Schedule 104113 Next refueling.

of leaking MSR relief valve.

h. Resolve setpoint error S. Carmichael SU Work 105116 Maintenance Instruction of main turbine low Completed, prepared for As Found and vacuum trip. Report in Repairs. Report in Progress typing.

IX Condensate /FW Oscillation J. Field SU Completed NA Input to Event Report.

3 LEGENO: SU = Stortup Required LT = Long Ters STATUS DATE 10-14-85 .

PE = Power Escalation OCTOBER 2,1985 TRANSIENT TIME 1600 NA = Not Applicable ST = Short Term - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ COMMENTS ETC.

X ICS Tuning

a. Prepare ICS/Feedpump N. Brock PE In STP to PRC 10/16/85.

tuning STP. Preparation

b. Perform tuning as plant N. Brock PE Engineering conditions permit. Required

c. aTc Control N. Brock LT Engineering XI Valve Identification Program

a. Develop list of selected B. Spencer SU Completed To include Operating systems for Operations Procedures A.37, walkdown. A.49,A.41, A.42, A.50, A.46, A.34, A.38, A.40, A.51, A.47, A.28, A.39, A.53, A.6.

b. Operations crew to walk B. Spencer SU In Progress 14 of 15 systems complete.

down systems to identify valves not on prints.

c. Prepare NCRs on findings B. Spencer SU In Progress 7 of 15 complete.

and revise procedures as necessary.

I -

LEGEND: SU = Stcrtup Required LT = Long Tern STATUS DATE 10-14-85 .

PE = Power Escalation OCTOBER 2,1985 TRANSIENT TIME 1600 l NA = Not Applicable

! ST = Short Tem - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ C00MENTS ETC.

XI d. Update drawings and B. Spencer LT In Progress DCNs to be generated.

place ids on valves,

e. QA Surveillance H. Canter SU Completed No's. 492, 488 XII "8" Feedwater Line Leak R. Lawrence 50 Completed 104548, 104564 Report addressing the Reactor Building. 104560, 104572 cause and the repair done.

102095, 104569 Material meets applicable 104567, S-5090 code.

S-5111

'XIII P-319 Bearing Failure

a. Pump Repair R. Lawrence SU Completed SP run and passed on 10/10/85.

b. Maintenixa :listory R. Lawrence SU Completed Surveillance History and Cause of Failure / Post Repair Test Corrective Action

c. QA Surveillance J. Jewett SU Completed No. 485

d. Provide oiling 8. Rausch SU Developing, To include safety related instructions Due 10-14 pumps. How to determine level. How to maintain oil level. Pump specific instructions. Training per XV.c.

m-, m LEGEIE): SU Stcrtup Required LT = Long Tern STATUS DATE 10-14-85 .

PE = Power Escalation OCTOBER 2, 1985 TRANSIENT TIME 1000 NA = Not Applicable ST = Short Teru - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ C0petENTS ETC.

XIII e. Past practice on LO B. Spencer SU In Progress Level.

f. Investigate why and when R. Lawrence SU In Progress

" Normal" level was Changed.

g. 48-Hour Endurance Run J. Field SU In Progress Scheduled to be completed 10-12 10-14.

h. Identify all safety R. Lawrence SU In Progress NA related pumps which utilize slinger rings.

1. Install new oiler. R. Lawrence ST ECNs Safety Analysis required.

Required J. Root Cause S. Crunk SU Included as subsection of Item II.

XIV Loss of Aux Steam Event

a. Prepare Report M. Nickerson SU Completed TS 85-1021

b. Root Cause S. Crunk LT To be NA RC 85-021 Completed 11/30/85

c. Investigate Aux Boiler C. Linkhart SU In Progress NA Power Supply.

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LEGEND: SU o Startup Required LT = Long Tern STATUS DATE 10-14-85 .

PE = Power Escalation OCTOBER 2, 1985 TRANSIENT TIME 1600 NA = Not Applicable ST = Short Term - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ COMMENTS ETC.

XIV d. I and C analysis of N. Brock LT To be XIV c. Completed 11/15/85 XV Training

a. Lessons Learned F. Thompson LT Reviewing NA

b. Training on Item III.b B. Spencer SU Continuing NA SO 20-85 (Instructions /

Recommendation)

c. Training on Item XIII.d. M. Hieroninus SU Scheduled NA Proper oil level instruction.

XVI Procedure Adequacy

a. E0Ps D. Comstock SU In Progress NA Procedure revisions to PRC 10/14.

b. Normal Procedures D. Comstock LT In Progress NA

c. Identify operator actions M. Hieronimus LT Active NA Requires input / feedback not specifically Program f rom AO's, EA's, etc.

addressed in procedures. Memo to SS of 10-10-85

" Problem Feedback Report."

d. Monitor operation D. Comstock PE Prepared NA QA surveillance planned.

procedures during SU. Validation of procedures will be performed.

LEGEND: SU = St rtup Required LT = Long Tcra STATUS DATE 10-14-85 ,

PE = Power Escalation OCTOBER 2, 1985 TRANSIENT TIME 1600 NA = Not Applicable ST Short Ters - ACTION LIST -

DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ COMMENTS ETC.

XVI e. Evaluate operator D. Comstock SU Completed NA performance during the trip.

XVII Health Physics / Emergency Plan

a. Health Physics aspects. F. Kellie SU Completed FWK 85-202 Nc flealth Physics impact.

b. Emergency Plan B. Spencer SU Completed NA Emergency Plan did not utilization. M. Heironimus require activation.

to B. Spencer memo XVIII RCS Overcooling

a. Tech Spec Review R. Colombo SU Required NA Preliminary results indicate Technical Specifications were not violated.

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b. B and W Evaluation J. Field SU In Progress NA B and W letter, SMUD-85-222, dated Oct. 4, 1985, " Structural Integrity of Pressure Boundary Components are Suitable for Continued Power Operation.

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LEGENO: SU = Stcrtup Required ,

LT = Long Tcru STATUS DATE 10-14-85 ,.

PE = Power Escalation OCTOBER 2, 1985 TRANSIENT TIME 1600 l NA = Not Applicable ST = Short Ters - ACTION LIST -

1 DESCRIPTION RESPONSIBILITY SCHEDULE STATUS WR No./NCR/ COMENTS ETC.

XIX Preventive Maintenance Program for Non-safety Related

-Equipment ,

a. Description of existing R. Lawrence SU NA N. Brock and C. Linkhart I program. ,

to provide IC/ Elect input.

b. Planned improvements. R. Lawrence LT Requires NA N. Brock and C. Linkhart 11/30/85 to provide IC/ Elect input.

response to l NRC.

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