ML14184B411

Nrc/Nei/Utility MTG 6/11/14

ML14184B411
Person / Time
Site:	Palo Verde
Issue date:	06/11/2014
From:	Wittas D Nuclear Energy Institute
To:	Division of Engineering
Shared Package
ML14184B374	List: ML14184B411
References
Download: ML14184B411 (14)

Text

NRC / NEI / UTILITY MTG 6/11/14 4" & 6" RD/CH Drain Piping Inspection at the Palo Verde Nuclear Generating Station Utilizing Quest's HYDRA

Ž Intelligent Pigging Technology

- Dan Wittas

- NRC / NEI / UTILITY MTG 6/11/14 1

WHY IN-LINE INSPECTION?

Consequence of a leak on these drain lines Location of the piping

-Between 3 large tanks

-Under other utilities Relatively accessible for deployment and retrieval inside the lines

NRC / NEI / UTILITY MTG 6/11/14 2

NRC / NEI / UTILITY MTG 6/11/14 3 WHY IN-LINE INSPECTION?

Location of the RD/CH piping

NRC / NEI / UTILITY MTG 6/11/14 4 WHY IN-LINE INSPECTION?

REFUELING WATER TANK NRC / NEI / UTILITY MTG 6/11/14 5 WHY IN-LINE INSPECTION?

HOLDUP TANK REACTOR MAKEUP WATER TANK NRC / NEI / UTILITY MTG 6/11/14 6 WHY IN-LINE INSPECTION?

HOLDUPTANK SUMP

NRC / NEI / UTILITY MTG 6/11/14 7 WHY IN-LINE INSPECTION?

NRC / NEI / UTILITY MTG 6/11/14 8 WHY IN-LINE INSPECTION?

RD LINES 4" THREADED CAP AND FLOOR DRAIN

NRC / NEI / UTILITY MTG 6/11/14 9 IN-LINE INSPECTION PLAN Build a team

- BP Engr / Ops / Proj Mgr / ISI / RP / Work Planner Select vendor and technology

-Site visits to 2 potential vendors

-Consideration of NDE technology, FME, equipment decontamination

-Quest's HYDRAŽ Intelligent Pigging Ultrasonic Technology was selected

NRC / NEI / UTILITY MTG 6/11/14 10 IN-LINE INSPECTION PLAN Full scale mockup for deployment, retrieval and blind flaw detection capability

-The inspection tool could be deployed and retrieved, thru 90s and a tee.

-The Quest HydraŽ UT inspection tool detected 26 of 34 flaws. All 8 undetected flaws were below the published detection threshold. 10 flaws below the threshold were detected, including 2

- 1/8" diameter flaws.

NRC / NEI / UTILITY MTG 6/11/14 11 IN-LINE INSPECTION PLAN Contingencies / Lessons Learned

- -Design engineering T

-min acceptance criteria

-Sump pumps need to be removed for access

-2 Launchers

-Backup water pump & inspection pig

-Pre-req for hot water flush to dilute boric acid

-Leak test ILI piping and use catch basins

NRC / NEI / UTILITY MTG 6/11/14 12 IN-LINE INSPECTION PLAN FG-47 Pump House Floor Drain Ground Penetration FG-46 Ground Penetration Valve Pit Sump Pit NRC / NEI / UTILITY MTG 6/11/14 13 IN-LINE INSPECTION PLAN FULL SCALE MOCK

-UP W/ 32 FLAWS PRIOR TO BURIAL

NRC / NEI / UTILITY MTG 6/11/14 14 IN-LINE INSPECTION PLAN Work and inspection instructions, with

-Initial conditions, such as, remove sump pumps, remove 90

° elbow in sump, disconnect tank overflow pipes, cap HUT pump skid and floor drains

-Connection of ILI equip, pump, launcher, pipe and valves

-Operate the ILI, evaluate the results and restore systems