05000263/LER-1980-017-01, /01T-0:on 800328,Bechtel Power Corp Notified Util That Control Rod Driveline Hydraulic Piping Frame Supports Would Not Meet OBE Stress Limits.Caused by Eds Computer Code Error.Supports Modified

/01T-0:on 800328,Bechtel Power Corp Notified Util That Control Rod Driveline Hydraulic Piping Frame Supports Would Not Meet OBE Stress Limits.Caused by Eds Computer Code Error.Supports Modified

ML112900707
Person / Time
Site:	Monticello
Issue date:	04/11/1980
From:	Day B Northern States Power Co
To:	NRC/OI/RGN-III/FO
Shared Package
ML112900708	List: 05000263/LER-1980-017, Forwards LER 80-017/01T-0 05000263/LER-1980-017-01, /01T-0:on 800328,Bechtel Power Corp Notified Util That Control Rod Driveline Hydraulic Piping Frame Supports Would Not Meet OBE Stress Limits.Caused by Eds Computer Code Error.Supports Modified
References
LER-80-017-01T, LER-80-17-1T, NUDOCS 8004180472
Download: ML112900707 (3)

LER-1980-017, /01T-0:on 800328,Bechtel Power Corp Notified Util That Control Rod Driveline Hydraulic Piping Frame Supports Would Not Meet OBE Stress Limits.Caused by Eds Computer Code Error.Supports Modified

Event date:
Report date:
2631980017R01 - NRC Website

text

I.-

REGULATORY *FORMATION DISTRIBUTION SY 4 M (RIDS)

ACCESSION NBR:8004180472 DOC.DATE: 80/04/11 NOTARIZED: NO FACIL:50-263 Monticello Nuclear Generating Plant, Northern States AUTHNAME AUTHOR AFFILIATION DAY,B.D, Northern States Power Co*

RECIP.NAME RECIPIENT AFFILIATION Region 3, Chicago, Office of the Director SUBJECT: LER 80-017/01T-0:on 800328,reduction of control rod driveline hydraulic piping frame support.Caused by EDS computer code error.Supports modified.

DISTRIBUTION CODE; A002S COPIES RECEIVED:LTR

.4 NCL t TITLE: Incident Reports DOCKET #

05000263 SIZE:

NOTES: --- --- --- -- --- --- -- --- --- -- --- --- -- --- --- -- --- --- --

RECIPIENT COPIES ID CODE/NAME LTTR ACTION:

05 6CQ 4

INTERNAL:

1 2

14 TA/EDO 1

16 EEB 1

18 PLANT SYS BR 1

20 AD PLANT SYS 1

23 ENGR BR 1

25 PWR SYS BR 1

27 OPERA LIC BR 1

29 AUX SYS BR 1

AEOD 10 DOUG MAY-TERA 1

JORDANE./IE 1

EXTERNAL:

03 LPDR 29 ACRS 1

16 RECIPIENT ID CODE/NAME ENCL 4

02 NRC PDR 11 MPA 15 NOVAK/KNIEL 17 AD'FOR ENGR 19 I&C SYS BR 22 REAC SAFT BR 214 KREGER 26 AD/SITE ANAL 28 ACDENT ANLYS AD/ORP-DOR BERLINGERC.

HANAUERS.

1 2

1 1

1 1

1 1

10 1

1 1

16 04 NSIC COPIES LTTR ENCL 1

3 1

1 1

1 1

1 1

1 3

1 1

1

,980

• 1 TOTAL NUMBER OF COPIES REQUIRED; LTTR 61 ENCL 61

NORTHERN STATES POWER COMPANY MINNEAPOLIS, MINNESOTA 55401 April 11, 1980 Mr J G Keppler Office of Inspection & Enforcement U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Mr Keppler:

MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Reduction of CRD Hydraulic Piping Frame Support Design Margins Caused by EDS Computer Code Error The Licensee Event Report for this occurrence is reproduced on the back of this letter.

Enclosed are three copies.

This event is reported in compliance with Technical Specification 6.7.B.1.i in that a condition was discovered which was contrary to the design requirements contained in the Final Safety Analysis Report.

Yours very truly, L 0 Mayer, PE Manager of Nuclear Support Services LOM/DMM/jh cc:

Director, IE, USNRC (40)

Director, MIPC, USNRC (3)

MPCA Attn:

J W Ferman

- over-

$0 0,418 () 4 6 8 S

i/1

7 8

CON'T 7

8 02 7

8 0

7 8

7 8

9 FACILITY STATUS

%POWER OTHER STATUS IT EJ@ Iololo0 1 N^MA 7

8 9

10 12 13 44 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY SI Z

I

@ U lI NA 7

8 9

10 11 44 PERSONNEL EXPOSURES NUM3ER TYPE

DESCRIPTION

0 1] 0 1 0 J5Z l

NA 7

8 9

11 12 13 PERSONNEL INJURIES NUMBER

DESCRIPTION

0 I

1 o 1I NA 7

8 9

11 12 LOSS OF OR DAMAGE TO FACILITY TYPE

DESCRIPTION

[LU I

NA 7

8 9

10 PUBLICITY ISSUED

DESCRIPTION

1 LL181 NA a 9 10.

NAME OF PREPAR METHOD OF DISCOVERY DISCOVERY DESCRIPTION 32 D

Notification from A/E 45 46 8

LOCATION OF RELEASE INA 45 8

80 0

0 80 80 80 NRC USE ONLY 612

- 5151 PH9 800.4 18 0472 Byron D. Day ER-(1-77)

LICENSEE EVLNI REPORT CONTROL BLOCK:

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 6 MI Nj Ml NJ P1 1101 01 01 - I01j0 0

0 -

0110 1O 14 l1 1 11j 1

(D 9

LICENSEE CODE 14 15 LICENSE NUMIBEII 25 26 LICENSE TYPE 30 57 CAT 58 REPORT [Lj Oj 5 501010121_6131() [01312181810) 101411111810l(D 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES I During a refueling outage, Bechtel Power Corporation notified licensee that CRD l

hydraulic piping frame supports will not meet OBE stress limits. This event is reportable under T.S.6.7.B.1.i. Supports will meet SSE limits. Health or safety j

of public not affected. No previous similar reportable event.

j 9

80 SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCOQE SUBCODE IR j Bj(^ (D Bj A I S jU IP 1O IR IT L]

9 10 11 12 13 18 19 20.

SEQUENTIAL OCCURRENCE REPORT REVISION LERRO EVENT YEAR REPORT NO.

CODE TYPE NO.

07 REORT1 8LoJ 0

1ol 11 7 1 j 1.0 [J

L-L R 21 22 23 24 26

- 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRD-4 PRIME COMP, COMPONENT TAKEN ACTION ON PLANT METHOD HOURS.

SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER LLJ@LJ@ IJ@

l o

a 1 JJ I

0 33 34 35 36 37 40 41 42 43 44

47.

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (2' Error in computer code used by EDS Nuclear caused original support design loads to I

be inaccurate.

Supportshave been modified to meet stress limits.

Bechtel has re-I viewed other systems affected by computer code error. No other modifications re-I quired.

10 11 12 13 14