ML070860287

8th Pinc Meeting Feb. 5-6, 2007, Proposed CRDM and Bmi Mockups Using Na 2 Nozzle 31 Results

ML070860287
Person / Time
Site:	North Anna
Issue date:	02/05/2007
From:	Stephen Cumblidge, Doctor S, Schuster G Battelle Memorial Institute, Pacific Northwest National Laboratory, US Dept of Energy (DOE)
To:	Office of Nuclear Reactor Regulation
Shared Package
ML070860236	List: ML070860251 ML070860274 ML070860287 ML070860321
References
Download: ML070860287 (25)

Text

b 5-6, 2007 Proposed CRDM and BMI Mockups using NA 2 Nozzle 31Results by G. J. Schuster, S.R. Doctor, and S.E. Cumblidge

07 Proposed CRDM and BMI Mockups Presentation Outline Eddy Current Tests z Wetted surface of seal weld Existing Test Blocks z Design drawings z Crack distributions New Test Blocks Crack Types z Comparison to NA 2 Results Schedule 2

07 For Use in Eddy Current Tests All cracks in the surface of the Seal Weld or Buttering Manufactured cracks selected to cover realistic eddy current response range.

Eddy current responses from cracks in NA 2 nozzle are now available Response from manufactured cracks are being discussed with vendors 3

07 Proposed CRDM and BMI Mockups Existing Test Blocks Design drawing shows how test block is made Cracks are distributed in the surface of the weld metal 4

07 Proposed CRDM and BMI Mockups Existing Test Blocks (cont.)

Table 3.2 All cracks in the PINC CRDM test blocks Crack Size Range Number of Cracks Available 1-9% through-wall 9 10-30% through-wall 8 31-60% through-wall 10 61-100% through-wall 2 Table 3.3 All cracks in the PINC BMI Test Blocks Crack Size Range Number of Cracks Available 1-9% through-wall 10 10-30% through-wall 9 31-60% through-wall 6 61-100% through-wall 5 5

07 Proposed CRDM and BMI Mockups New Test Blocks Alloy 182 Coupons (TFC, WSC, SCC) 6

07 Proposed CRDM and BMI Mockups New Test Blocks Alloy 182 Coupons WNP-1 BMI Nozzle Penetrations WNP-1 CRDM Nozzle Penetrations 7

07 Proposed CRDM and BMI Mockups Crack Types Laboratory grown SCC: available in Alloy 182 coupons only Weld solidification cracks: install in WNP-1 weldments. Realistic responses.

Thermal fatigue cracks: install in WNP-1 weldments. Strong responses. Working with the vendor on this issue.

Reponses Distribution from NA2 nozzle 31 cracks documented for use in manufacturing cracks 8

07 Proposed CRDM and BMI Mockups Crack Types (Cont.)

0

-2 1.0 mm TFC notch Response (dB to Cal.)

-4 SCC

-6 WSC

-8 0.5 mm Manufactured cracks notch NA2 indications

-10 EDM notches

-12

-14

-16 1 2 3 4 5 6 7 8 9 Discontinuity number 9

PWSCC in NA2 Nozzle NDE and DE Report Visual Testing Completed Penetrant Testing Completed Ultrasonic Testing Completed Eddy Current Completed Sectioning Started 10

7 NDE of PWSCC in NA2 Nozzle Eddy Current Responses Plus point probe 350 KHz Zero degree probe rotation 11

7 NDE of PWSCC in NA2 Nozzle Eddy Current Responses Plus point probe 350 KHz Indication at 200 degrees Confirmed with PT and VT 12

7 NDE of PWSCC in NA2 Nozzle Eddy Current Responses Plus point probe 350 and 150 KHz Indication at 225 degrees Confirmed with PT and VT 8 mm long 13

7 NDE of PWSCC in NA2 Nozzle Eddy Current Responses Plus point probe 350 and 150 KHz Indication at 255 degrees No PT indication 14

7 NDE of PWSCC in NA2 Nozzle Eddy Current Responses Plus point probe 350 KHz No PT indication 15

16 NDE of PWSCC in NA2 Nozzle Visual Testing Images Flaw at 200 Degrees Flaw is approximately 4 mm long 17

7 NDE of PWSCC in NA2 Nozzle Visual Testing Images Flaw at 225 Degrees Flaw is approximately 4 mm long 18

NDE of PWSCC in NA2 Nozzle Preliminary Sectioning Results 19

NDE of PWSCC in NA2 Nozzle Preliminary Sectioning Results (cont.)

Ultrasonic indication was recorded from inside tube Cut was made through ultrasonic indication Indication was in fusion zone of seal weld with tube 20

NDE of PWSCC in NA2 Nozzle Preliminary Sectioning Results (cont.)

21

NDE of PWSCC in NA2 Nozzle Preliminary Sectioning Results (cont.)

22

NDE of PWSCC in NA2 Nozzle Preliminary Sectioning Results (cont.)

23

NDE of PWSCC in NA2 Nozzle Preliminary Sectioning Results (cont.)

24

Proposed Schedule for PINC RRT Team schedule for Mid-T RRT discussed later Crack manufacture time being negotiated 25