United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9712290023





                                             Illinois Power Company

                                             Clinton Power Station

                                             P.O. Box 678

                                             Clinton, IL 61727

                                             Tel 217 936-5623

ILLINOIS                                     Fax 217 936-4932

     POWER

                                             John G.  Cook

An Illinova Company                          Senior Vice President



                                             U-602892

                                             2C.220

                                             4F.140



                                             December 23, 1997



Docket No.  50-461                           10CFR50.73

                                             10CFR21.211

Document Control Desk

Nuclear Regulatory Commission

Washington, D.C.  20555



Subject:  Clinton Power Station - Unit 1

          Licensee Event Report No.  97-028-00

          and 10CFR Part 21 Report No. 21-97-056



Dear Madam or Sir:



     Enclosed is Licensee Event Report (LER) No. 97-028-00 and 10CFR,

Part 21 Report No. 21-97-056: Failure of ABB to Supply Properly Qualified

Components Results in Inoperability of All Thirty-Three In-Service 480-

Volt K-Line Safety-Related Circuit Breakers.  This report is being

submitted in accordance with the requirements of 10CFR50.73 and

10CFR21.21.



     This Licensee Event Report contains the following commitments:



o    Illinois Power will either replace or repair the affected components

     in the inservice ABB safety-related 480-volt K-Line circuit breakers

     with properly qualified components or evaluate that the currently

     installed power shield trip units on ABB safety-related 480-volt K-

     Line circuit breakers are acceptable for the expected environmental

     conditions.



o    Illinois Power will obtain and review a list of 10 CFR Part 21

     notifications for circuit breakers and relays from ABB to determine

     if Illinois Power was notified of applicable 10 CFR Part 21

     notifications.



                                        Sincerely yours,



                                        J. G. Cook

                                        Senior Vice President





                                                  U-602863            



MRS/krk



Enclosure



cc:  NRC Clinton Licensing Project Manager

     NRC Resident Office, V-690

     Regional Administrator, Region III, USNRC

     CPS Branch Chief, Region III, USNRC

     Illinois Department of Nuclear Safety

     INPO Records Center





POWER REACTOR                           EVENT NUMBER:  33450



FACILITY: CLINTON        REGION: 3      NOTIFICATION DATE:  12/23/97

UNIT:     [1] [ ] [ ]     STATE: IL     NOTIFICATION TIME:  20:04 [ET]

RX TYPE: [1] GE-6                       EVENT:              12/23/97

                                        EVENT TIME:         20:04[CST]

NRC NOTIFIED BY: K. S. FRANTZ           LAST UPDATE DATE:   12/23/97

HQ OPS OFFICER:  JOHN MacKINNON

                                             NOTIFICATIONS

EMERGENCY CLASS: NOT APPLICABLE

10 CFR SECTION:                         G.  WRIGHT          RDO

CCCC 21.21     UNSPECIFIED PARAGRAPH 

                                        VERN HODGE          NRR



UNIT SCRAM CODE RX CRIT  INIT PWR  INIT RX MODE   CURR PWR   CURR RX

MODE



1         N       N         0      COLD SHUTDOWN     0      COLD SHUTDOWN



                               EVENT TEXT



LICENSEE SENT IN A LICENSEE EVENT REPORT (LER NO. 97-028-00) WITH A PART

21 IN ITS BODY AND THE LICENSEE WANTED THE PART 21 PORTION OF THE LER

REPORTED.



ON NOVEMBER 26, 1997, ILLINOIS POWER DETERMINED THAT ABB FAILED TO

NOTIFY

ILLINOIS POWER OF A PROBLEM WITH THE QUALIFICATION OF POWER SHIELD

TRIP

UNITS SUPPLIED WITH ABB 480-VOLT K-LINE CIRCUIT BREAKERS.  THIS ISSUE

WAS

DETERMINED TO BE POTENTIALLY REPORTABLE UNDER 10 CFR PART 21. 

ILLINOIS

POWER HAS COMPLETED EVALUATION OF THIS ISSUE AND CONCLUDES THAT IT

IS

REPORTABLE UNDER THE PROVISIONS OF 10 CFR PART 21.



ILLINOIS POWER IS PROVIDING THE FOLLOWING INFORMATION IN ACCORDANCE

WITH

10 CFR PART 21.21 (c)(4).  INITIAL NOTIFICATION OF THIS MATTER WILL BE

PROVIDED BY FACSIMILE OF THIS LETTER TO THE NRC OPERATIONS CENTER IN

ACCORDANCE WITH 10 CFR PART 21.21 (c)(3) WITHIN 2 DAYS OF THE DATE THE

RESPONSIBLE OFFICER APPROVES THIS REPORT.



(i) JOHN G.  COOK, SENIOR VICE PRESIDENT OF ILLINOIS POWER COMPANY,

CLINTON POWER STATION HIGHWAY 54, 6 MILES EAST, CLINTON, ILLINOIS, 61727,

IS INFORMING THE NRC OF A CONDITION REPORTABLE UNDER THE PROVISIONS

OF

10

CFR PART 21 BY MEANS OF THIS REPORT.



(ii) THE BASIC COMPONENT INVOLVED IN THIS REPORT IS THE QUALIFICATION

OF

THE POWER SHIELD TRIP UNITS ASSOCIATED WITH ABB 480-VOLT K-LINE

SAFETY-

RELATED CIRCUIT BREAKERS.



(iii)  THE POWER SHIELD TRIP UNITS ASSOCIATED WITH ABB 480-VOLT K-LINE

SAFETY RELATED CIRCUIT BREAKERS WERE SUPPLIED BY ABB.



                        (Continued on next page)





FACILITY: CLINTON                         PAGE # 2 OF EVENT NUMBER: 33450



(iv) AS DISCUSSED IN THE DESCRIPTION OF EVENT PORTION OF THIS REPORT THE

NATURE OF THE CONDITION IS THE FAILURE TO NOTIFY ILLINOIS POWER OF THE

PROBLEM WITH THE QUALIFICATION OF THE POWER SHIELD TRIP UNITS

ASSOCIATED

WITH ABB 480-VOLT K-LINE SAFETY-RELATED CIRCUIT BREAKERS.



AS DISCUSSED IN THE ANALYSIS OF EVENT PORTION OF THIS REPORT, FAILURE

OF

THE POWER SHIELD TRIP UNITS ASSOCIATED WITH ABB 480-VOLT K-LINE

SAFETY-RELATED CIRCUIT BREAKERS COULD CAUSE THE CIRCUIT BREAKERS

TO

NOT

PROPERLY PERFORM THEIR SAFETY FUNCTION.



(v)  ON NOVEMBER 26, 1997, ILLINOIS POWER IDENTIFIED THAT THEY WERE NOT

NOTIFIED OF THE PROBLEM WITH QUALIFICATION OF THE POWER SHIELD TRIP

UNITS

ASSOCIATED WITH ABB 480-VOLT K-LINE SAFETY-RELATED CIRCUIT BREAKERS

AND

ILLINOIS POWER DETERMINED THAT THIS ISSUE WAS POTENTIALLY

REPORTABLE

UNDER 10 CFR PART 21.



(vi) THIS ISSUE AFFECTS THE POWER SHIELD TRIP UNITS ASSOCIATED WITH ABB

480-VOLT K-LINE SAFETY-RELATED CIRCUIT BREAKERS.  ILLINOIS POWER IS

AWARE

THAT A 10 CFR PART 21 NOTIFICATION WAS MADE BY ADD TO THE NRC ON JULY

28,

1994, ON THIS ISSUE.  HOWEVER, ILLINOIS POWER WAS NOT NOTIFIED BY ABB OF

THIS ISSUE.



(vii) THE CORRECTIVE ACTION THAT ILLINOIS POWER IS TAKING FOR THIS EVENT

IS DISCUSSED IN THE CORRECTIVE ACTION PORTION OF THIS REPORTS (SEE LER

REPORT SENT BY CLINTON).



(viii) ILLINOIS POWER HAS NO ADDITIONAL INFORMATION TO OFFER.



CLINTON POWER STATION MADE AN EVENT NOTIFICATION TO THE NRC

OPERATION

CENTER CONCERNING THIS ISSUE ON 11/26/97 AT 1436 EST AND THE ITS

ASSIGNED

EVENT NUMBER IS 33317.





*** END OF DOCUMENT ***



 

ACCESSION #:  9712290027

                       LICENSEE EVENT REPORT (LER)



FACILITY NAME:  Clinton Power Station                     PAGE: 1 OF 4



DOCKET NUMBER:  05000461



TITLE:  Failure of ABB to Supply Properly Qualified Components

        Results In Inoperability of All In-Service Thirty-Three

        480-Volt K-Line Safety Related Circuit Breakers



EVENT DATE:  11/26/97   LER #:  97-028-00   REPORT DATE:  12/23/97



OTHER FACILITIES INVOLVED:                          DOCKET NO:  05000



OPERATING MODE:  4   POWER LEVEL:  000



THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR

SECTION:

50.73(a)(2)(vii), OTHER



LICENSEE CONTACT FOR THIS LER:

NAME:  Mark Wagner, Engineer, Nuclear       TELEPHONE:  (217) 935-8881,

       Station Engineering Department                   Extension 4071



COMPONENT FAILURE DESCRIPTION:

CAUSE:      SYSTEM:       COMPONENT:       MANUFACTURER:

REPORTABLE NPRDS:



SUPPLEMENTAL REPORT EXPECTED:  NO



ABSTRACT:



On November 26, 1997, the plant was in Mode 4 (Cold Shutdown) for the

sixth refueling outage (RF-6).  Engineering identified that the

environmental qualification of the power shield trip units associated

with all thirty-three inservice ABB 480-volt K-Line safety-related

circuit breakers ware not sufficient to withstand the expected dose rates

following a worst case lost of coolant accident.  The cause of this event

is that ABB can no longer assure Illinois Power that the power shield

trip units associated with ABB-480-volt K-Line safety-related circuit

breakers are qualified for the expected post lose of coolant accident

radiation dose.  Also, Illinois Power was not notified by ABB when they

made the 10 CFR Part 21 notification of this condition.  The corrective

action for this event includes, either replace or repair the affected

components in the inservice ABB 480-volt K-Line safety related circuit

breakers with properly qualified components or evaluate that the

installed power shield trip units on ABB 480-volt K-Line safety-related

circuit breakers are acceptable for the expected environmental

conditions, obtain and review a list of 10 CFR Part 21 notifications for

ABB circuit breakers and relays to determine if Illinois Power was

notified of applicable 10 CFR Part 21 notifications.



END OF ABSTRACT



TEXT                                                          PAGE 2 OF 4



DESCRIPTION OF EVENT



On November 26, 1997, the plant was in Mode 4 (Cold Shutdown) for the

sixth refueling outage (RF-6), reactor (RCT) coolant temperature was

being maintained within a band or 100 to 120 degrees Fahrenheit and

pressure was atmospheric.  Engineers were reviewing information such as

technical bulletins and 10 CFR Part 21 notifications that they had

requested from ABB to determine applicability to the ABB 480-volt K-Line

circuit breakers [52] installed at Clinton Power Station (CPS).  This

review was being conducted to ensure that ABB vendor information had been

properly addressed at the station.  Included in this review was a 10 CFR

Part 21 report issued by ABB on July 28, 1994.  The July 26, 1994, 10 CFR

Part 21 listed several products supplied by ABB to nuclear power plants.

These products were not qualified to sustain the radiation levels

previously described in the qualification reports supplied to the

purchasers by ABB.  Review of this notification and discussions with ABB

revealed that the power shield trip unit, used on thirty-three inservice

ABB 480-volt K-Line safety-related circuit breakers at Clinton Power

Station, were affected by this notification.  Illinois Power was not

included in the attachment to the 10 CFR Part 21 notification that listed

the affected utilities and did not receive the notification.



The qualification reports provided for the power shield trip units

documented that they ware environmentally qualified to 1.0 E5 Rads,

Gamma, total dose.  The 10 CFR Part 21 notification states that the power

shield trip units are actually only qualified to receive 1.0 E3 Rads,

Gamma, total dose.  The power shield trip units, used in all

safety-related ABB 480-volt K-Line circuit breakers, are required to be

environmentally qualified to receive 1.0 E5 to 1.0 E4 Rads, Gamma, total

dose.  These radiation dose values are associated with the radiation dose

received by the component following a postulated worst case loss of

coolant accident.  A calculation was performed to determine what the

radiation dose the power shield trip units would be subjected to under

the most severe accident during the current operating mode (Mode 4).  The

results of the calculation disclosed that the power shield trip unit

radiation dose would not exceed the 1.0, E3 Rads, Gamma, total dose

qualification of the installed power shield trip units.  Therefore, these

devices are operable while the plant is shutdown.



No automatic or manually initiated safety system responses were necessary

to place the plant in a safe and stable condition.  This event was not

affected by other inoperable equipment or components.



CAUSE OF THIS EVENT



ABB can no longer provide assurance that the power shield trip units

supplied by ABB with their 480-volt K-Line safety-related circuit

breakers meet the radiation dose requirements specified in the purchase

specification for these components.



TEXT                                                          PAGE 3 OF 4



CORRECTIVE ACTION



Illinois Power will either replace or repair the affected Power shield

trip units in the inservice, ABB 480-volt K-Line safety-related circuit

breaker's to obtain properly qualified power shield trip units or

evaluate that the currently installed power shield trip units on

safety-related 480-volt K-Line circuit breakers are acceptable for the

expected environmental conditions.  Operations entered a Mode restraint

to not enter Mode 2 (Startup) until this issue in resolved.  Also,

Illinois Power will obtain and review a list of 10 CFR Part 21

notifications for circuit breakers and relays from ABB to determine if

Illinois Power was notified of other applicable 10 CFR Part 21

notifications.



ANALYSIS OF EVENT



This event is reportable under the provisions of 10CFR50.73 (a)(2)(vii)

as a condition where a single cause or condition could have caused two

independent trains to become inoperable in a single system designed to

remove residual heat, mitigate the consequences of an accident, or shut

down the reactor and maintain it in a safe shutdown condition.



This event is potentially nuclear safety significant.  The affected

components are installed on all inservice ABB 480-volt K-Line

safety-related circuit breakers at CPS.  In the event of an accident the

power shield trip units could fail due to excessive radiation exposure.

This could prohibit 480-volt supplied equipment from operating or

tripping when required.



The power shield trip units for the ABB 480-volt K-Line safety-related

circuit breakers have not been qualified since the equipment was

initially put into service during plant construction.



ADDITIONAL INFORMATION



No equipment or components failed during this event.



Illinois Power has not reported in recent history an event involving

circuit breaker components or relays being installed without proper

environmental qualification.



For further information on this event contact Mark Wagner, Engineer,

Nuclear Station Engineering Department, at (217) 935-8881, extension

4071.



10CFR Part 21 Report 21-47-056



On November 16, 1997, Illinois Power determined that ABB failed to notify

Illinois Power of a problem with the qualification of power shield trip

units supplied with ABB 480-volt K-Line circuit breakers.  This issue was

determined to ha potentially reportable under 10 CFR Part 21.  Illinois

Power has completed evaluation of this issue and concludes that it is

reportable under the provisions of 10 CPR Part 21.



TEXT                                                          PAGE 4 OF 4



Illinois Power is providing the following information in accordance with

10 CFR Part 21.21(c)(4).  Initial notification of this matter will be

provided by facsimile of this letter to the NRC Operations Center in

accordance with 10 CFR Part 21.21 (c)(3) within 2 days of the date the

responsible officer approve this report.



(i)       John G.  Cook, Senior Vice President of Illinois Power Company,

          Clinton Power Station, Highway 54, 6 miles East, Clinton,

          Illinois, 61727, is informing the NRC of a condition reportable

          under the provisions of 10 CFR Part 21 by means of this report.



(ii)      The basic component involved in this report is the

          qualification of the power shield trip units associated with

          ABB 480-volt K-Line safety-related circuit breakers.



(iii)     The power shield trip units associated with ABB 480-volt K-Line

          safety-related circuit breakers were supplied by AM



(iv)      As discussed in the DESCRIPTION OF EVENT portion of this report

          the nature of the condition is the failure to notify Illinois

          Power of the problem with the qualification of the power shield

          trip units associated with ABB 480-volt K-Line safety-related

          circuit breakers.



          As discussed in the ANALYSIS OF EVENT portion of this report,

          failure of the power shield trip units associated with ABB

          480-volt K-Line safety-related circuit breakers could cause the

          circuit breakers to not properly perform their safety function.



(v)       On November 26, 1997, Illinois Power identified that they were

          not notified of the problem with qualification of the power

          shield trip units associated with ABB 480-volt K-Line

          safety-related circuit breakers and Illinois Power determined

          that this issue was potentially reportable under 10 CFR Part

          21.



(vi)      This issue affects the power shield trip units associated with

          ABB 480-volt K-Line safety-related circuit breakers.  Illinois

          Power is aware that a 10 CFR Part 21 notification was made by

          ABB to the NRC on July 28, 1994, on this issue.  However

          Illinois Power was not notified by ABB of this issue.



(vii)     The corrective action that Illinois Power is taking for this

          event is discussed in the CORRECTIVE ACTION portion of this

          report.



(viii)    Illinois Power has no additional information to offer.



*** END OF DOCUMENT ***





 

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