ML070780431

CR-PNP-2001-02275, a SSW Discharge Piping 20 Foot Section of Rubber Lining Peeled Off of Piping Exposing Bare Metal

ML070780431
Person / Time
Site:	Pilgrim
Issue date:	05/03/2001
From:	Entergy Corp
To:	Office of Nuclear Reactor Regulation
References
Download: ML070780431 (5)

Text

Erzfwgy I CONDITION REPORT Originator:

CONVERTED DATA Originator Group: CONVERTED DATA Supervisor Name: CONVERTED DATA Discovered Date:

05/03/2001 0O:OO CR-PNP-2001-02275 Originator Phone:

0 Operability Required:

N Reportability Required:

N Initiated Date:

05/03/2001 0O:OO Condition

Description:

DURING VISUAL EXAM OF 'A SSW DISCHARGE PIPING IT WAS DISCOVERED THAT A 20 FOOT SECTION OF RUBBER LINING WAS PEELED OFF OF THE PIPING EXPOSING BARE METAL Immediate Action

Description:

Suggested Action

Description:

EQUIPMENT:

Tag Name Tag Suffi Name Component Code Process System Code 29 REFERENCE ITEMS:

Type Code Description CONVERTED PR PR.01.2275 TRENDING (For Reference Purposes Only): Trend Type Trend Code KEYWORDS MAINT RULE Entergy ADMIN Initiated Date: 5/3/2001 0:OO Current Contact:

WALKER, J. Owner Group :Eng Sys Mech Staff Current Significance:

C - CORRECTION Closed by: WALKER, J. 5/11/2001 0:OO CR-PNP-2001-02275 Summary

Description:

DURING VISUAL EXAM OF 'A SSW DISCHARGE PIPING IT WAS DISCOVERED THAT A 20 FOOT SECTION OF RUBBER LINING WAS PEELED OFF OF THE PIPING EXPOSING BARE METAL Remarks

Description:

PR=EF TP00-037 SSW SALT SERVICE WATER MR1000753 T.

TRAINOR Closure

Description:

SEE CORRECTIVE ACTION RESPONSE.

A S S I G N M E N T S 1 CR-PNP-2001-02275 I Version: 1 Significance Code: C - CORRECTION Classification Code: NON-SIGNIFICANT Owner Group:

Eng Sys Mech Staff Performed By: GaedtkeJoseph R Assignment

Description:

EVALUATE 'A SSW DISCHARGE PIPING INSPECTION PLAN. 05/03/2001 0O:OO U.T. RESULTS TO DETERMINE CORRECTIVE ACTION CORRECTIVE ACTION Enterg)/ CR-PNP-2001-02275 Subassigned To : Group ___ Originated By: MCELHINNEY, T. Performed By: GAEDTKE, J. Subperformed By: Approved By: Closed By: MCELHINNEY, T. Name 5/3/2001 0O:OO:OO 5/10/2001 0O:OO:OO 5/10/2001 0O:OO:OO ~~ Current Due Date:

05/03/2001 Initial Due Date: 05/03/2001 CA Type: GENERAL Plant Constraint:

NONE CA

Description:

EVALUATE 'A SSW DISCHARGE PIPING INSPECTION - U.T. RESULTS TO DETERMINE CORRECTIVE ACTION PLAN. Response:

Subresponse

CONVERTED DATA

- Entffgy Closure Comments: CORRECTIVE ACTION PLAN DEVELOPED. CORRECTIVE ACTION CR-PNP-2001-02275 1.OProblem

Description:

While inspecting the "A" SSW Discharge piping in accordance with TP99-031, a 20 foot section of rubber lining was found peeled off the piping exposing bare metal. The effected SSW spool was JF29-11-4.

2. Apparent/Direct Cause:

Age related wear of the original 30-year-old liner.

The cause of these and previous failures have been determined to be aging rubber lining. OExtensive testing was conducted during the intake buried piping root cause analysis. Representative samples of the rubber lining removed from pipe spools were sent to the S.G. Pinney Associates Inc. Laboratory testing was performed to determine the physical properties of the rubber lining.

Of particular interest were three parameters;

a. tensile testing, b. Tensile testing for elongation and c. Shore Hardness testing. Their report identified that the physical parameters of these tests indicated a loss of ductility of the rubber that resuIts in embrittlement, cracking and susceptibility to mechanical damage. Their conclusion indicated that the original lining of the Salt Service Water Piping at Pilgrim station had reached the end of its performance life. They also stated that in other industrial applications (such as oil refining and chemical production), rubber lined pipe in salt water service is considered to have a 15 year economic life and is either relined or replaced on a scheduled basis. Their analysis indicated that the lifetime was consistent with the findings of the examination of the Salt Service Water Piping at PNPS. 3. OEquipment Performance Issues: System Number 29 Component Number JF29-11-4 UComponent Type or Description "A" Loop SSW Discharge Pipe Spool @Maintenance Rule Functional Failure:

0 YES 1 NO 0 Unknown 3. Corrective Actions Completed (include Dates if possible)

The "A" Loop SSW Discharge Piping was originally going to be relined with a CIPP (Cured In Place Pipe) Lining in accordance with PDCO 1-09. Due to problems encountered with liner impregnation and premature curing (exothermic reaction), that lining was not installed.

As a result, this 20 ' and several additional areas in the "A" Loop discharge line were repaired by an alternate means using Belzona Ceramic R-Metal epoxy compound in accordance with FRNOI-09-05 and MR10000753. This work was completed on 5/4/01. 5.UCorrective Actions Required (if not required, check "NR") 1 N/R 6.OTrend Data for Apparent Cause (check "N/R" if analysis deals with equipment performance only) 1N/R [3 7.0The significance should:

0 Be Upgraded 1 Remain the Same O If applicable, the reason for the upgrade: