ML070780418

CR-PNP-2000-09228, P-161C Suction Piping 98 Deg. Elbow for C Continuous SSW Hypo Pump Cracked and Leaking Into Burm Area

ML070780418
Person / Time
Site:	Pilgrim
Issue date:	06/12/2000
From:	Entergy Nuclear Generation Co
To:	Office of Nuclear Reactor Regulation
References
CR-PNP-2000-09228
Download: ML070780418 (6)

Text

ET?!tWg)f CONDITION REPORT CR-PNP-2000-09228 Originator: CONVERTED DATA Originator Phone: 0 Originator Group: CONVERTED DATA Operability Required: N Reportability Required: N Supervisor Name: CONVERTED DATA Discovered Date: 06/12/2000 0O:OO Initiated Date: 06/12/2000 0O:OO Condition

Description:

MAINTENANCE DISCOVERED P-161C SUCTION PIPING 98 DEG ELBOW FOR C CONTINUOUS SSW HYPO PUMP CRACKED AND LEAKING INTO BURM AREA Immediate Action

Description:

Suggested Action

Description:

EQUIPMENT:

Tag Name Tag S u f f i Name Component Code Process System Code 27 REFERENCE ITEMS:

Type Code Description CONVERTED PR PR.00.9228 TRENDING (For Reference Purposes Only):

Trend Tvpe Trend Code KEYWORDS MAINT RULE

Enfefgy ADMIN CR-PNP-2000-09228 Initiated Date: 6/12/2000 0:OO Owner Group :Maint Programs Staff Current

Contact:

SHATAS, A.

Current Significance: C - CORRECTION Closed by: SHATAS, A. 6/19/2000 0:OO Summary

Description:

MAINTENANCE DISCOVEREDP-161C SUCTION PIPING 98 DEG ELBOW FOR C CONTINUOUS SSW HYPO PUMP CRACKED AND LEAKING INTO BURM AREA Remarks

Description:

PR=HPI HYPO P-161C MR10001275 PIPING CRACKED LEAKING BURM Closure

Description:

EVALUATION AND CORRECTIVE ACTION COMPLETE.

En&ygy ASSIGNMENTS CR-PNP-2000-09228 Version: 1 Significance Code: C - CORRECTION ClassificationCode: NON-SIGNIFICANT Owner Group: Maint Programs Staff Performed By: DeTemple,Francis J 06/19/2000 0O:OO Assignment

Description:

CONDUCT A REWORK EVALUATION FOR THE CONCERNS IDENTIFIED BY THIS PROBLEM REPORT.

DETERMINE AND IMPLEMENT REQUIRED CORRECTIVE ACTIONS.

NOTE: "AN APPARENT CAUSE ANALYSIS SHALL BE PERFORMED IF THE EVALUATION DETERMINES THAT THIS IS A REWORK ISSUE".

Enteqg-y I CORRECTIVE ACTION 1 CR-PNP-2000-09228 CA Number: 1 I i _ ~ _

Group JI Name I Assigned By: Maint Programs Staff MCALLISTER, S.

Assigned To: Maint Programs Staff DeTemple,Francis J Subassigned To :

Originated By: MCALLISTER, S. 6/12/2000 0O:OO:OO Performed By: DETEMPLE, F. 7/6/2000 0O:OO:OO Subperformed By:

Approved By:

Closed By: MCALLISTER, S. 7/6/2000 0O:OO:OO Current Due Date: 08/l 8/2000 Initial Due Date: 08118/2000 CA Type: GENERAL Plant Constraint: NONE CA

Description:

CONDUCT A REWORK EVALUATION FOR THE CONCERNS IDENTIFIED BY THIS PROBLEM REPORT.

DETERMINE AND IMPLEMENT REQUIRED CORRECTIVE ACTIONS.

NOTE: "AN APPARENT CAUSE ANALYSIS SHALL BE PERFORMED IF THE EVALUATION DETERMINES THAT THIS IS A REWORK ISSUE".

Response

CONVERTED DATA Subresponse :

Entqgy CORRECTIVE ACTION CR-PNP-2000-09228 Closure Comments:

MEMO DETAILING THE RESULTS OF THE REVIEW AND THE CORRECTIVE ACTIONS TAKEN.

UPON COMPLETION FORWARD A COPY TO J. GAEDTKE.

PROBLEM REPORT PROBLEM REPORT No. 00.9228.00 EVALUATION RESPONSE

1. Problem

Description:

Maintenance discovered P-161C suction piping 90-degree elbow for P-161C continuous SSW hypo pump cracked and leaking into burm area.

2. ApparentDirect Cause: Over-tightening of the PVC elbow caused cracking to occur. It was noted that great difficulty was encountered during removal of the elbow.

3. Repeat Occurrence: __ YES -X- NO A yes answer may require significance elevation based on nature and extent of problem 4.Equipment Performance Issues: System Number -HYPO- Component Number P - 161C-Maintenance Rule Functional Failure: -YES -X- NO -Unknown

5. Corrective Actions Completed (include Dates if possible): Elbow replaced. Work completed IAW temporary repair procedure 1.5.3.9 under MR 10001275 on 6-28-00.

6. Corrective Actions Required (If not required check "N/R") -X- N/R

7. Trend Data for Apparent Cause (check "N/R" if analysis deals with equipment performance only) N/R a) Inappropriate Action (IA)

Description:

During initial installation worker tightened the PVC elbow to tight.

IA Job Title -Worker IA Group -Maint IA Department M a i n t ENTERGY X 0Contractor Work Process -MC Key Activity F W O&P Failure Mechanism 5 HEIA Failure Mechanism -1M Human Error Type (Circle 1): Skill BasedO Rule BasedO Knowledge Based Procedure Number(s) -N/A Event Type REW-

8. The Significance should: Be Upgraded -X- Remain the Same If applicable, the reason for the upgraded:

Completed By: -J. DETEMPLE Date: 6 --I 00-

@ OEvaluatorMentor Approved By: -S. MCALISTER Date: 7 I 6 /LOO-00Manager

[7118/00; A. SHATAS] A COPY OF THIS EVALUATION WAS SENT TO J. GAEDTKE.

NOTE: P-161C SUCTION PIPING 90?ELBOW SHOWED EVIDENCE OF OVERTIGHTENING OF THE PVC ELBOW. DURING ELBOW REPLACEMENT, GREAT DIFFICULTY WAS ENCOUNTERED DURING UNTHREADING OF THE CRACKED PVC ELBOW. A NEW PVC ELBOW WAS INSTALLED AND TIGHTENED SUFFICIENT TO PREVENT LEAKAGE AT THE NPT CONNECTION.

THE 5-FUNCTION VALVE ON THE P-161C DISCHARGE PIPING WAS REPLACED WITH A SINGLE-FLTNCTION AIR BLEED VALVE DUE TO A CRACKED INLET NIPPLE CAUSED BY INSUFFICIENT PIPING SUPPORT AND PULSE VIBRATION FROM THE POSITIVE DISPLACEMENT PUMP. ADDITIONAL SUPPORT FOR P-161A AND D 1 F . l r n T P r U A a r C T T ~ A C D D T T n D ~ T T T n 1~ '- T n T l T E R q ? ~ E N T W A C