05000325/LER-1978-092-01, /01T-0 on 781219:final Stress Rept Shows That 15 Pipe Supports Were Not Installed or Configured as Assumed in Stress Analysis.Caused by Field Revision During Const.Plant Mods Have Been Issued

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/01T-0 on 781219:final Stress Rept Shows That 15 Pipe Supports Were Not Installed or Configured as Assumed in Stress Analysis.Caused by Field Revision During Const.Plant Mods Have Been Issued
ML19274D134
Person / Time
Site: Brunswick 
Issue date: 01/05/1979
From: Tollison A
CAROLINA POWER & LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19274D132 List:
References
LER-78-092-01T, LER-78-92-1T, NUDOCS 7901150086
Download: ML19274D134 (4)
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LER-1978-092, /01T-0 on 781219:final Stress Rept Shows That 15 Pipe Supports Were Not Installed or Configured as Assumed in Stress Analysis.Caused by Field Revision During Const.Plant Mods Have Been Issued
Event date:
Report date:
3251978092R01 - NRC Website
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8 60 61 DOCK E T NUVBE R 68 63 EVENT DATE 74

?S REPORT OATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o

2 10n December 19, 1978, we were informed by the plant architect-engineer that the fin,1 l l stress report review for Brunswick Plant has revealed that approximately 15 pipe sup-1 fo 3

l ports were not installed or configured as assumed in the st.ress analysis and that the 1 o

4 I actual stresses in the as-built conditions are above the normal stresses allowed by j o

s Icode. The stresses are, however, below the stresses allowed by the code under faulted I io o

l conditions (including design basis carthquake), and the lines would be operable nnd l

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o a t intact during these faulted conditions.

(A list of deficiencies is attached).

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CAUSE

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VALVE CODE CODE SUBCCDE COYPONENT CODE SUSCODE SUSCODE l S l F l@ lB l@ lA l@lS l Ul Pl 0 l Rl T l@ lB l@ lZ l@

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9 10 11 12 13 t ti 13 20 SEQUENTI AL OCCURRENCE REFORT REVISION y

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CODE TYPE NC.

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_ 21 22 23 24 26 27 23 29 3J 31 32 ACTION FUTURE EFFECT SHUTDOWN ATT ACHM E N T N P R D-4 PRiVE COMP.

COVPONENT TAKEN ACTION ON PL ANT METHOD HOURS SUBMITTED FORM bub.

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40 41 42 43 44 47 CAUSE oESCRIPTION AND CORRECTIVE ACTIONS l During construction a number of pipe supports were field revised and incorporated i

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i l into the plant design through A/E approved field memorandums. A final stress report l 7

j review by the A/E determined that a number of these changes were unacceptable in theiy l as-built condition.

Plant Modifications have been issued to correct all the pipe l

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] support deficiencies identified by the A/E. These modifications have been (cont.)

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NPOWER OTHER$7ATUS ISCO HY DISCOVERY DESCRIPTION lE g l0 l6 l0 lg FA l

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ACTIVITY CONTENT RELEASED OF RE LE ASE AYOUNT OF ACTivlTY LOCATION CF RELE ASE 1 6 lZ @ W@l NA l

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1 8 9 10 11 44 45 80 FERSONN E L f xPO',;LRE S l 0 l 0 l 0 l@ TYPE @l DESCRIPTION l

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NAYE OF PREPARER

LER COYrINUATION -- ROJ 1-78-092

' Facility: BSEP Unit #1 Event Date 12-19-78 Cause Descriotion and Corrective Actions (cont) completed or, if they have not, the maximum calculated stress for the present unmodified condition (including scismic loads) does not exceed the allowable stress for a faulted condition as defined in Section III of the ASME Code. Thus, the piping will not fail structurally under worst case conditions.

The A/E was requested to review the Unit No. 2 final stress report, where one additional deficiency was found. All modifications will be completed when materials are available.

0 ATTACIDENT (1)

Pipe Support Deficiencies - As Identified By A/E Unit System Line Size Applicable P/M Status & Comments 1

CAC 3/4"78-300 Approved modification sent to PPCD 12/21/78 for installation.

Max. calculated stress in existing condition is 35308 psi which would not fail.

1 RCIC 1"78-300 Approved modification sent to PPCD 12/21/78 for installation.

Failure of the line would not make RCIC inoperable.

1 Se rvice 6"78-300 Approved mod. sent to PPCD. Max Water calculated stress in existing condition 26,980 psi would not fail.

2 Se rvico 6"78-301 Based on this calc. the RHR room coolers (1B & 2B) have been placed back into service.

1 RHR 4"78-300 Approved mod. sent to PPCD.

Max calc. stress in existing condition is 33,392 psi and would not fail.

1 RHR 3/4" & 1"78-299 Comolete 1

RHR 1",1",& 3/4"78-299 Comolete 1

RHR 1"78-299 Comolete 1

RHR 1",1", & 3/4"78-299 Complete

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