IR 05000482/1997004

Discusses Meeting Conducted in Region IV Ofc on 970515 Re Violations Identified in NRC Insp Rept 50-482/97-04 Re Afs. Meeting Attendee List & Licensee Presentation Matl Encl

ML20141H102
Person / Time
Site:	Wolf Creek
Issue date:	05/19/1997
From:	Gwynn T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To:	Maynard O WOLF CREEK NUCLEAR OPERATING CORP.
References
50-482-97-04, 50-482-97-4, NUDOCS 9705230194
Download: ML20141H102 (23)

Text

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UNITE D STATES

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- NUCLEAR REGULATORY COMMISSION

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. _ , q 3i e g REGloN IV

-8 611 RY AN PLAZA DRIVE, Sulf E 400 >

h, # AR LINGTON, T E xAS 76011 8064 I

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MAY I 91997 .

Otto L. Maynard, President and

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Chief Executive Officer Wolf Creek Nuclear Operating Corporation.

~ P.O.' Box 411.

Burlington, Kansas 66839 SUBJECT: MANAGEMENT MEETING TO DISCUSS AFW PUMP ISSUES

Dear Mr. Maynard:

' This refers to the meeting conducted in the Region IV office on May 15,1997. This meeting related to violations identified in NRC Inspection Report 50-482/97-04 regarding the auxiliary feedwater system. The meeting was beneficial in providing us an

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understanding of your corrective actions for these violations as well as your broader scope corrective actions. In addition, you provided an overview of the current condition of the auxiliary feedwater system, including improvements which have been made over the past 7 year.

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I in accordance with Section 2.790 of the NRC's " Rules of Practice," Part 2, Title 10, Code of Federal Regulations, a copy of this letter will be placed in the NRC's Public Document Room.

Should you have any questions concerning this matter, we will be pleased to discuss them

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with you.

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Sincerely,

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T mas P. n . .

Division of Reator Projects i Docket No.: 50-482 License No.: NPF-42

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Enclosures:

1. Attendance List

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2. Licensee Presentation -

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Chief Operating Officer '

Wolf Creek Nuclear Operating Corp.

P.O. Box 411 Burlington, Kansas 66839 ,

9705230194 970519 W PDR ADOCK 05000482 G PDR j y

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' Wolf Creek Nuclear ~ -2-

' Operating Corporation f

. Jay'Silberg, Esq.

Shaw,' Pittman, Potts & Trowbridge l 2300 N Street, NW Washington, D.C. 20037 .

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' Supervisor Licensing Wolf Creek Nuclear Operating Corp.

P.O. Box 411

' Burlington, Kansas 66839

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~ Chief Engineer .

Utilities Division

'. Kansas Corporation Commission .

1500 SW Arrowhead Rd.

Topeka, Kansas 66604-4027 'i

- Office of the Governor l State of Kansas ,

. Topeka, Kansas 66612  ;

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- A'ttorney General Judicial Center 301 S.W.10th  !

.2nd Floor Topeka,- Kansas 66612 1597 l

County Clerk - j Coffey County Courthouse

. Burlington, Kansas 66839-1798'

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Vick L. Cooper, Chief Radiation Control Program

. . Kansas Department of Health and Environment Bureau of Air and Radiation Forbes Field Building 283

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- Topeka, Kansas 66620 Mr ' Frank Moussa -1 Division of Emergency Preparedness -

2800 SW Topeka Blvd; Topeka, Kansas : 66611 1287 -

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Wolf Creek Nuclear : -3-MAY - l 9 1997-Operating Corocration bec to DCD (IE45):

. bcc distrib, by RIV:

Regional Administrator . Resident inspector DRP Director SRI (Callaway, RIV)

Branch Chief (DRP/8) DRS-PSB Project Engineer (DRP/8) MIS System Branch Chief (DRP/TSS) RIV File -

K. Perkins, Director, WCFO - 8. Henderson, PAO ~

C. Hackney, RSLO -

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l To receeve copy of document, indicate l$x: "C" = Copy without *nclosures "E" = Copy wth enclosures "N" = No copy RIV:PE:DRP/B- C:DRP/$ g D:DRP -

SJCampbeil;df WDJohnpn TPGwynnL q f

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5/6/97 QC 5%/97 y 5/gf97 ( "

OFFIClAL F ECORD COPY

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Wolf Creek Nuclear -3- gyl9jg Operating Corporat,on i

bec to DCD (IE45).  ;

bec dist"!b. by RIV: .;

Regional Administrator Resident inspector DRP Director SRI (Callaway, RIV).

Branch Chief (DRP/B) DRS-PSB ,

Project Engineer (DRP/B) MIS System Branch Chief (DRP/TSS) RI V File ,

K. Perkins, Director, WCFO B. Henderson, PAO [

C. Hackney, RSLO Y

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To receive copy of document, indicate l$x: "C" = Copy without exlosures *E" = Copy with enclosures "N" = No copy j RIV:PE:DRP/B C:DRP/$ / D:DRP SJCampbell;df WDJoh@n TPGwynnL If 5/M/97 % 5%/97 y 5/W97 Q' -

OFFIClAL RECORD COPY ,

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ENCLOSURE 1

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ATTENDANCE LIST PURPOSE OF MEETING: Discussion of AFW Pump Issues with the Wolf Creek Nuclear Operating Corporation LOCATION: Region IV. Arlington. Texas DATE: May 15. 1997 TIME: 12:30 p.m.

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AFW SYSTEM  ;

MEETING

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e Inspection Report 97-04 o Broader Scope Corrective Actions .

e Auxiliary Feedwater (AFW) System Condition

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e Summary

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! IXSPECTION REPORT

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e Multidiscipline team was assigned to investigate and determine the root causes and corrective actions e 1220 man-hours were expended during this root cause investigation e PIR investigation results reviewed and accepted by the Corrective Action Review Board (CARB)

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INSPECTION REPORT 97-04

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oNOV 9704-02, Example 1 - System Engineer manipulated Turbine Driven Auxiliary Feedwater Pump (TDAFWP) governor valve without work package or authorization from the Shift Supervisor Root Cause - Rule based - failure to follow procedures Corrective Actions-Counseled and disciplined System Engineer (Complete)

-Discussed work controls with all System Engineers and Operating Crews (Complete)

-Train appropriate engineers on work controls and procedure use (7/1/97)

-integrated Plant Scheduling (IPS) to address Team Leader responsibilities in procedure, develop qualification card, and maintain list of qualified personnel (5/30/97)

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INSPECTION REPORT 97-04 eNOV 9704-02, ExarbhhbP pted by System Engineer, Operators manipulated speed of the TDAFWP below 3850 RPM Root Cause - Rule basec - misjudgment Corrective Actions

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-Counseled and disciplined Operations and System Engineering personnel (Complete)

-Re-emphasized procedure compliance expectations to operating i crews (Complete)

l -Trained System Engineers on the Shift Supervisor's (SS) role in plant work and 3-way communications (Complete) ,

-Revised SYS AL-124," Venting the Turbine Driven Auxiliary Feedwater Pump Oil System" (Complete)

-Revised AP 15C-002, " Procedure Use and Adherence," to add literal compliance definition (Complete) 4

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IXSPECTION REPORT 97-04

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o NOV 9704-03 - Procedure precaution to monitor oil pressure failed to define low speeds and low oil pressure and actions to be taken. On the Spot Change (OTSC)

j required actions that could not be accomplished due to the design of the circuit.

Root Cause - Knowledge based - unsuccessful correlation of available information for evaluation of a task

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Corrective Actions-Revised SYS AL-124 to add precautions to maintain oil pressure between 5-20 psig and address actuation of LS-6 (Complete)

-Expanded Instruction Manual to capture LS-6 correlation information (Complete)

-Train Licensed Operators (LOs) and Non Licensed Operators (NLOs) on LS-6 operation (6/30/97) 5

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INSPECTION REPORT -

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i 97-04  ;

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.. e NOV 9704-04 - Operator attempted to trip the TDAFWP

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by pulling on the trip linkage.

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Root Cause - Rule based - informal training fostered

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using an inappropriate trip method Corrective Actions-Immediately informed Shift Supervisors, Supervising Operators

and operating crews of proper methods for tripping TDAFWP (Complete)

-Provided Essential Reading for operating crews on acceptable methods for tripping TDAFWP (Complete)  ;

-Provide additional communications on unacceptability of"ad hoc" l operation (6/30/97)

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IXSPECTIOX REPORT 97-04

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e Conclusions WCNOC immediately recognized the significance of these events A comprehensive root cause analysis indicated personnel performance issues 1 Personnel performance associated with these events does not meet Wolf Creek's expectations and is considered unacceptable in addition to the corrective actions taken specifically for these events, broader scope initiatives to improve ,

personnel performance are underway and will provide long term corrective actions

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BROADER SCOPE

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CORRECTIVE ACTIOXS .

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e Performance Improvement International Training

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(Root Cause, Corrective Action, and Human '

Performance)

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o Accountability and Discipline Training (MARC)

e PIR Coordinators e Corrective Action Review Board (CARB)

e System Functional Assessments and Walkdowns e Performance Indicators ,

o Culture Surveys and Followup Actions '

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o Corporate Focus (Top 5 Priorities) s

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i AFW SYSTEM COXDITIOX

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e AFW Functional Self Assessment - Complete 12/96

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Reviewed the active functions of the AFW System Approximately 5 person-years of effort

e AFW System Walkdown - Complete 4/97 Walkdown compared plant configuration with USAR and

operating procedures Interviewed Operations and Maintenance personnel

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o Assessment and Walkdown Results No hardware modifications required

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AFW System configuration and operation is consistent with the licensing basis

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AFW SYSTEM COXDITIOX

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=.gg.gg o AFW System Monitoring Improvements:

Oil analysis - turbine and pumps -

Shaft sleeve nut measurements

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Packing gland and bearing temperatures TDAFWP controls performance trending l Open work package trends Feedwater backleakage monitoring Steam leak monitoring at stop valve

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High level alarm trend on trap bypass to condenser

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Trip throttle valve stroke time

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AFW SYSTEM COXDITIOX '

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AFW System Problems Corrected e Corrected pump packing performance probiems; improved material is being used (Figure 1)

o Changed LS3 limit switch setting to increase trip throttle valve reliabi;ity i

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e Modified R1 resistor to eliminate chronic failures

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System Initiatives

e Increased trip throttle valve stroke time to reduce

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e Adjusted "A" MDAFWP balance drum to decrease bearing operating temperatures (Figure 3) '

o Modified TDAFWP turbine seal housing drains to 1 reduce water intrusion into oil (Figure 4)

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' Measured Water Concentration in Terry Turbine Oil System 4000 1 4008 3600 - - --

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$ 3200 - -

+ Dec. 21, 96 _,_ _ _ _ _ _ _

8 -o-Jan. 25,97 l

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,! 777 400 - 144-- - - - -

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493 o Y 139 0 2 Turbine Run Time (Hours) 4 Dec.12, After Oil Change and Oil Cooler inspection Dec. 21, After Inspection and rework of turbine casing joint.

Jan. 25, After modification to the turbine steam seal drain lines.

Figure 4

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SUMMARY

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! o WCNOC understands that our performance must l continue to improve and it will!

e WCNOC has the right performance improvement

program in place - the improvement we seek takes time t

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e WCNOC will continue to take care of performance

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challenges in a timely and comprehensive fashion  ;

e WCNOC will continue to monitor and take timely and comprehensive corrective action for its safety related equipment l

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