ML20107M204

Forwards Responses to Questions Re Cracking in Recirculation Sys Welds,Per 841031 Telcon.Further Investigation Revealed That Three Weldments Were Free of Reportable Indications. Weld 12-23 Data for 1983 & 1984 Encl

ML20107M204
Person / Time
Site:	FitzPatrick
Issue date:	11/07/1984
From:	Bayne J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	Vassallo D Office of Nuclear Reactor Regulation
References
JPN-84-73, NUDOCS 8411140071
Download: ML20107M204 (42)

Text

123 Man street White Pfans, New York 700,01 914 681.6200

1. > NewYorkPbwer 4# Authority November 7, 1984 JPN-84-73 Director of Nuclear Reactor Regulations U.S.

Nuclear Regulatory Commission Washington, D.C.

20555 Attention:

Mr. Domenic B. Vassallo, Chief Operating Reactor Branch No. 2 Division of Licensing

Subject:

James A.

FitzPatrick Nuclear Power Plant Docket No. 50-333 Recirculation System Welds

References:

1.

NYPA letter, C.A. McNeill, Jr. to D.B.

Vassallo, dated October 25, 1984 (JAFP-84-1001) 2.

NYPA Letter, C.A. McNeill, Jr. to D.B.

Vassallo, dated October 21, 1984 (JAFP-84-0979).

Dear Sir:

In References 1 and 2 we transmitted information regarding cracking in the recirculation system welds which was discovered during the September 1984 outage.

The enclosure to this letter responds to questions which were transmitted to us in a telephone conversation on October 31, 1984.

Attachments 1 to 4 refer to question 1 of the enclosure.

If you have any further questions, please contact Mr. J. A. Gray, Jr. of my staf f.

Very truly yours, J. P. Bayne First Executive Vice President Chief Operations Officer cc:

Office of the Resident Inspector U.S. Nuclear Regulatory Commission Post Office Box 136 Lycoming, New York 13093 f

00 I

Enclosure

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8411140071. 841107 j

PDR ADOCK 05000333 PDR p

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Enclosure to JPN-8 4-73 Recirculation System Welds James A.

FitzPatrick Nuclear Power Plant Docket No. 50-333

Response to question 1.

Weld 12-23 In 1977, General Electric Co. performed an inspection on the subject weld as did Ebasco in the Summer, 1983 outage.

These inspections resulted in the findings of indications which were deemed to be geometric in origin.

The plots made were based on a projected OD/ID profile (flat-topped weld crown and ideal ID profile) and did not reflect the actual conditions.

In addition to this, the exams were performed using full-length 45' wedges which prevented the shoe from going beyond the

" butt-up" position which is necessary to obtain a meaningful examination.

The shortened (EPRI-modified) wedges were not available until late (fall) 1983.

Replotting of the 1983 data using 1984 ID/OD profile information.(Attachment #1) shows that weld geometry was the cause of the indication recorded by Ebasco.

In the September, 1984 outage, further investigation was performed by the NYPA and Ebasco Level III's including examination of OD profile. As a result it was determined that a 45' exam, even if performed with the EPRI-modified wedges, would not examine the area-of-interest (the heat affected zone between the counterbore and root) due to the O.D. configuration (See Attachment #2).

Based on this information and the projected exit point vs. area-of-interest relationship, a 60*

exam was performed on weld 12-23.

The remainder of the welds-which have a similar OD profile, were also examined using a 60' shear wave if the 45* exam proved inadequate.

As a result of these inspections, all pipe-safe end welds which were inspected in 1983 were reinspected (i.e., welds 12-1, 12-7, & 12-75).

These inspections, utilizing the 60* technique, revealed that these three weldments were free of reportable indications.

Attachment #3 is a resubmittal of weld 12-23 data which was generated in 1983 and Attachment #4 is the 1984 data.

Response-to question 2.

Sizing Techniques In-NYPA Letter JAFP-84-1001, Introduction, a reference was made toJ"headwave, creeping wave on ID."

The correct reference is

" head wave, creeping wave on OD."

Response to question 3.

As-Built Overlay Thicknesses Weld Number As-built thickness after Thickness with 1st layer 1st layer (in)

(in) 12-12 0.499 0.644 12-23 0.568 0.680 12-64 0.671 0.705 12-69 0.482 0.596 12-70 0.385 0.504 l'

k.!

Response to question 4.

Measured Axial Shrinkage Weld Number Axial Shrinkage (in) 12-12 0.135 12-23 0.180 12-64 0.223 12-69 0.126 12-70 0.199

Response-to questions 5 and 6.

Shrinkage Stresses There are no unrepaired cracked; welds on the same run of pipe (riser) as an overlay.

Therefore, there is no significant effect of shrinkage stresses due to overlay on other unrepaired flawed welds.

The analyses previously. submitted to you are, therefore, accurate.

Preliminary conservative hand calculations for shrinkage of approxime.tely 0.2" resulted'in maximum shrinkage stresses of 7000 psi (7 ksi) at the sweepolet to riser pipe weld (on the manifold) associated with the individual safe-end.

Final, detailed calculations are still in progress.

1 4

4 J

Response to question 7.

-Weld 12-17 In the. report on the subject weld, the word " seismic" was omitted from.the stress equation.. This was a typographical error and does not affect the numberical values of the equation wnich'are correct.

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ATTACHMENT I JPN-84-73 i

RECIRCULATION SYSTEM WELDS JAMES A.

FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333

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Weld 12-02-2-23 Reference Remaining Crack Nominal Wall Distance Wall Depth Thickness (inches)

]

O.00 0.2000 0.5100 0.660 0.25 0.2000 0.5100 0.660 0.50 0.2000 0.5100 0.660

-0.75 0.2000 0.5100 0.660 1.00 0.2000 0.5100 0.660 1.25 0.2250 0.4850

'O.660 1.50 0.2500 0.4600 0.660 1.75 0.2750 0.4350 0.660 8

2.00 0.3000 0.4100 0.660 2.25 0.3250 0.3,850 0.660 2.50 0.3500 0.3600 0.660 2.75 0.3750 0.3350 0.660 3.00 0.4000 0.3100 0.660 3.25 0.4125 0.2975 0.660 3.50 0.4250 0.2850 0.660 3.75 0.4375 0.2725 0.660 4.00 0.4500 0.2600 0.660 4.25 0.4000 0.3100 0.660 4.50 0.3500 0.3600 0.660 4.75 0.3000 0.4100 0.660 lll 5.00 0.2500 0.4600 0.660 5.25 0.2625 0.4475 0.660 5.50 0.2750 0.4350 0.660 5.75 0.2875 0.4225 0.660 6.00 0.3000 0.4100 0.660 6.25 0.3250 0.3850 0.660 6.50 0.3500 0.3600 0.660 6.75 0.3750 0.3350 0.660 7.00 0.4000 0.3100 0.660 7.25 0.4625 0.2475 0.660 7.50 0.5250 0.1850 0.660 7.75 0.5875 0.1225 0.660 8.00 0.6500 0.0600 0.660 8.25 0.6000 0.1100 0.660 8.50 0.5500 0.1600 0.660 8.75 0.5000 0.2100 0.660 9.00 0.4500 0.2600 0.660 9.25 0.4250 0.2850 0.660 9.50 0.4003 0.3100 0.660 9.75

^ ~/50 0.3350 0.660 10.00 0.3500 0.3600 0.660 10.25 0.4250 0.2850 0.660 10.50 0.5000 0.2100 0.660 10.75 0.5750 0.1350 0.660 11.00 0.6500 0.0600 0.660 11.25 0.6050 0.1050 0.660 4

11.50 0.5600 0.1500 0.660 11.75 0.5150 0.1950 0.660 12.00 0.4700 0.2400 0.660

'12.25 0.4350 0.2750 0.660

t.s Weld 12-02-2-23 f-(_)g Reference Remaining Crack Nominal Wall Distance Wall Depth Thickness (inches) 12.50 0.4000 0.3100 0.660 12.75 0.3650 0.3450 0.660 13.00 0.3300 0.3800 0.660 13.25 0.4100 0.3000 0.660 13.50 0.4900 0.2200 0.660 13.75 0.5700 0.1400 0.660 14.00 0.6500 0.0600 0.660 14.25 0.6000 0.1100 0.660 14.50 0.5500 0.1600 0.660 14.75 0.5000 0.2100 0.660 15.00 0.4500 0.2600 0.660 15.25 0.4550 0.2550 0.660 15.50 0.4600 0.2500 0.660 15.75 0.4650 0.2450 0.660 16.00 0.4700 0.2400 0.660 16.25 0.4650 0.2450 0.660 16.50 0.4600 0.2500 0.660 16.75 0.4550 0.2550 0.660 17.00 0.4500 0.2600 0.660 17.25 0.5000 0.2100 0.660 f) 17.50 0.5500 0.1600 0.660 17.75 0.6000 0.1100 0.660 18.00 0.6500 0.0600 0.660 18.25 0.6125 0.0975 0.660 18.50

-0.5750 0.1350 0.660 18.75 0.5375 0.1725 0.660 19.00 0.5000 0.2100 0.660 19.25 0.4925 0.2175 0.660 19.50 0.4850 0.2250 0.660 19.75 0.4775 0.2325 0.660 20.00 0.4700 0.2400 0.660 20.25 0.4900 0.2200 0.660 20.50 0.5100 0.2000 0.660 20.75 0.5300 0.1800 0.660 21.00 0.5500 0.1600 0.660 21.25 0.5750 O.1350 0.660 21.50 0.6000 0.1100 0.660 21.75 0.6250 0.0850 0.660 22.00 0.6500 0.0600 0.660 22.25 0.6500 0.0600 0.660 32.50 0.6500 0.0600 0.660 22.75 0.6500 0.0600 0.660

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23.00 0.6500 0.0600 0.660 23.25 0.6500 0.0600 0.660 23.50 0.6500 0.0600 0.660 23.75 0.6500 0.0600 0.660 O

24.00 0.6500 0.0600 0.660 24.25 0.5875 0.1225 0.660 24.50 0.5250 0.1850 0.660 24.75 0.4625 0.2475 0.660 ane----.,--

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.g Weld 12-02-2-23 e"

V Reference Rem.ining Crack Nominal Wall Distance Wall Depth Thickness (inches) 25.00 0.4000 0.3100 0.660 25.25 0.3775 0.3325 0.660 25.50 0.3550 0.3550 0.660 25.75 0.3325 0.3775 0.660 26.00 0.3100 0.4000 0.660 26.25 0.3200 0.3900 0.660 26.50 0.3300 0.3800 0.660 26.75 0.3400 0.3700 0.660 27.00 0.3500 0.3600 0.660 27.25 0.3625 0.3475 0.660 27.50 0.3750 0.3350 0.660 27.75 0.3875 0.3225 0.660 28.00 0.4000 0.3100 0.660 28.25 0.4625 0.2475 0.660 28.50 0.5250 0.1850 0.660 28.75 0.5875 0.1225 0.660 29.00 0.6500 0.0600 0.660 29.25 0.6500 0.0600 0.660 29.50 0.6500 0.0600 0.660 29.75 0.6500 0.0600 0.660 IT 30.00 0.6500 0.0600 0.660 30.25 0.5825 0.1275 0.660 30.50 0.5150 0.1950 0.660 30.75 0.4475 0.2625 0.660 31.00 0.3800 0.3300 0.660 31.25 0.4025 0.3075 0.660 31.50 0.4250 0.2850 0.660 31.75 0.4475 0.2625 0.660 32.00 0.4700 0.2400 0.660 32.25 0.4525 0.2575 0.660 32.50 0.4350 0.2750 0.660 32.75 0.4175 0.2925 0.660 33.00 0.4000 0.3100 0.660 33.25 0.3875 0.3225 0.660 33.50 0.3750 0.3350 0.660 33.75 0.3625 0.3475 0.660 34.00 0.3500 0.3600 0.660 34.25 0.3650 0.3450 0.660 34.50 0.3800 0.3300 0.660 34.75 0.3950 0.3150 0.660 35.00 0.4100 0.3000 0.660 t

35.25 0.4075 0.3025 0.660 35.50 0.4050 0.3050 0.660 35.75 0.4025 0.3075 0.660 36.00 0.4000 0.3100 0.660 (3

36.25 0.3250 0.3850 0.660 U

36.50 0.2500 0.4600 0.660 36.75 0.1750 0.5350 0.660 37.00 0.1000 0.6100 0.66'O 37.25 0.1250 0.5850 0.660

e 9

Weld 12-02-2-23 Reference Remaining Crack Nominal Wall Distance Wall Depth Thickness (inches) 37.50 0.1500 0.5600 0.660 37.75 0.1750 0.5350 0.660 38.00 0.2000 0.5100 0.660 38.25 0.2250 0.4850 0.660 38.50 0.2500 0.4600 0.660 38.75 0.2750 0.4350 0.660 39.00 0.3000 0.4100 0.660 39.25 0.2750 0.4350 0.660 39.50 0.2500 0.4600 0.660 39.75 0.2250 0.4850 0.660 40.00 0.2000 0.5100 0.660 40.25 0.2000 0.5100 0.660 40.50 0.2000 0.5100 0.660 40.75 0.2000 0.5100 0.660 41.00 0.2000 0.5100 0.660 O

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