ML20107L969
| ML20107L969 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 11/09/1984 |
| From: | Finneran J TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | |
| Shared Package | |
| ML20107L964 | List: |
| References | |
| OL, NUDOCS 8411130722 | |
| Download: ML20107L969 (17) | |
Text
~
e-no Attachment UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AllD LICENSING BOARD In the Matter of
)
)
Docket Nos. 50-445 and TEXAS UTILITIES ELECTRIC
)
50-446 COMPANY, et al.
)
- ~ ~ ~
)
( Application for (Comanche Peak Steam Electric
)
Operating Licenses)
Station, Units 1 and 2)
)
AFFIDAVIT OF JOHN C.
FINNERAN, JR.
REGARDING INFORMATION RELATED TO CINCHING DOWN OF U-BOLTS I, John C. Finneran, Jr, being first duly sworn, hereby depose and state as.follows:
I am the Pipe Support Engineer for the Pipe Support Engineering Group at Comanche Peak Steam Electric Station.
In this position, I oversee the design work of all pipe design organizations for Comanche Peak.
I have previously provided testimony in this proceeding.
A statement of my professional and educational qualifications was received into evidence as Applicants Exhibit 142B.
The purpose of this Affidavit is 'to respond to the Board's request that Applicants provide the " raw data" concerning the torquing of U-bolts referred to in Table 2 to " Affidavit of Robert C.
Iotti and John C. Finneran, Jr. Regarding Cinching Down of U-Bolts"' attached to Applicants' Motion for Summary fl1130722841109 ADOCK 05000445 0
PDR 1
(
Disposition of CASE's Allegations Regarding Cinching Down of U-Bolts ~(June 29, 1984).
Octob'er 24, 1984 Board Memorandum (Raw Data on U-Bolts).
Specifically, the Board requested the folloying four(items:
(1)"the raw data, t
(2) the procedure by which the raw data was collected, (3) the criteria for selecting the sample, and t
(4) raw data on readings excluded from the sample.
s The. Board stated that the data provided (average torque value of the two nuts on each U-bolt) did not allow the Board to " examine the variance of readings on individual bolts [ nuts]."
October 24 Memorandum at 1.
\\
Attached hereto are the raw data of t'e actual field inspections requested by the Board.
I would note that the average torque on the two nuts of each U-bolt was reported since our intent was to determine torque that would establish a preload on the U-bolt and the pipe in the test, where an equal torque would be applied to both leds.
The purpose of collecting this da'ta was to provide us an indication of what torque values may be expected in the field in order to reasonably set some parameters for the.U-bolt testing program discussed in Applicants' Motion
(
for Summary Disposition on this issue.
The field inspections during which the data were collected
- ti were conducted by 3 PSE engineers.
While no formal procedures for the inspection were written, the three engineers were given verbal instructions as to what they were to do.
The instructions were to measure and record the torque of both nuts on any cinched t
o-
~ -
down U-bolts that could be found in Unit 21 that were unpainted.
(If a U-bolt had.been painted, the torque reading would have been affected.)
In that torquing practice on safety and non-safety t
systems was the same, U-bolts on safety as well as non-safety a
systems were checked.
The engineers were told to check torque by tightening the nut and when movement was noted to record the r
' reading on the torque wrench.
Calibrated torque wrenches were used.
Each leg of the U-bolt was checked where accessible.
In addition, the engineers were told to record the size of the pipe (though in a few instances this was overlooked).
The attached raw data contains numerous comments made after the raw data-were collected.
In that the Board requested the,
" raw data," we have not attempted to clean it up to make it more understandable.
It should be noted that where a support had two U-bolts, the readings for both are noted.
Further, where one of s
the nuts on a U-bolt was not accessible, it was indicated by an N/ A or other such reading.
Further, in some cases the supports were not included in the sample size for one of several reasons.
For the Board, I have listed the reasons below and noted in the for not margin of the raw data the corresponding reason number including the data.
1.
These supports were not included becaase at the time we summarized the data, we did not know the pipe sizes, i.e.,
it 1
In that Unit 1 had already been painted, the only possible source of torque data reflecting true field conditions was Unit 2.
The U-bolt configurations employed in Unit 2 are the same as those in Unit 1 and the construction process for torquing U-bolts had remained unchanged for Units 1 and 2.
Accordingly, this decision would have had no impact on the adequacy of the data for the purpose needed, as stated above.
1
, m..
.Q g' (..
was not listed by the engineer and because the summation process was done under time constraints - for filing, we did not take the time to go back and check the size at that time.
^
Subsequently, we have checked the sizes and they are all three inch pipe.
2.
Same as item 1, except the size was 16 inch pipe.
2 3.
Same as item 1, except the size was 12 inch pipe.
4.
Same as item 1, except it was a non-safety related pipe and we did not go back to check the pipe size.
w 5.
The engineer deleted this support because the U-bolt was not cinched, and no reading should have been taken.
6.
The engineer apparently wrote down the wrong hanger numbers (i.e.,
no such numbers existed).
Accordingly, the numbers could not be verified and thus the support was not included.
7.
This support-was a deadweight 32 inch pipe support in the turbine building.
We felt that the deadweight might effect the reading.
(It should be noted that no 32 inch pipe supports were included.)
D
/
8 When this support drawing was initially examined, no U-bolt was listed.
Accordin' gly, we thought that the engineer had made a mistake and we did not include it.
Subsequently, in again reviewing the support for this filing, we found that the support had been modified and the documentation now reflects a U-bolt.
9.
This support was the only 1 1/2 inch pipe inspected and it was felt that the concern was not focused on such small bore pipe supports, thus the reading was y
not entered.
10.
This support was inadvertently not included.
( (_ ~ - >
f p C. Finneran, Jr.
[
STATE OF TEXAS COUNTY OF SOMER\\TLL Subscribed and sworn to before me this f8l day of November,1984,
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