ML20010E661
| ML20010E661 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 08/31/1981 |
| From: | Colbert W DETROIT EDISON CO. |
| To: | Kintner L Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20010E662 | List: |
| References | |
| EF2-54-390, NUDOCS 8109080111 | |
| Download: ML20010E661 (3) | |
Text
Detroit Edison 5F059==
August 31, 1981 EF2 - 54,390 2 h *J Mr. L. L. Kintner U. S. Nuclear Regulatory Commission gh Office of Nuclear Reactor Regulation 1-6 Division of Licensing Qv Q
W2shington, D. C. 20555 90 b
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Dear Mr. Kintner:
//
Reference:
Enrico Fermi Atomic Power Plant, Unit 2 NRC Docket No. 50-341
Subject:
beismic Qualification Review Team (SQRT) Audit Response to Open Items As stated in our letter (EF2-54,251) of August 13, 1981 we attach, herewith, our response to-open items Nos. 6, 7, 8, la, 2a and 3a.
If there are any questioris, please contact Larry E.
Schuerman at 313-649-7562.
Sincerely,
?[(
W.
Colbert Technical Director Enrico Fermi 2 WFC:jl Attachment cc:
Mr. B. Little d[
Dr. Morris Reich y
l VO 8109000111 810831 DR ADOCK 05000341 PDR
~
l l
Attachment to EF2 - 54,390 Page 1 CPEN ITEM #6 Barton Flow Transmitter: SORT Audit Item #21 Provide: 1) Bolt size and base plate dimensiens as mounted on the par.el;
- 2) Details of test mount conditions, and 3) Investigation of the device capability at resonance frequency of 30Hz in z-direction, by August 31, 1981.
Response: The seismic qualification of Barton Differential Pressure Transmitter (PPD #117C3387 used in B31-No 14a) was done by similarity to Barton Differential Pressure Transmitter (PPD #145C3026) - both devices are Model 368.
1.
The base plate as mounted on Rack H21-P0006 is 6" x 14" x 1/8" thick. The mounting bolts are 5/16" 2.
No details were given in ITT Qualification Test Report
- RI-368-3 dated 10/13/71 (found in GE DRF #A00-1084.
DV ll7C3387) on mounting conditions. However, the transmitter was rigidly mounted to the test fixture and accelerometers were placed on the device in the x, y and z directions.
3.
Comparing resonant frequency of (P= 30 H ) to driving g
frequency (W = 33 H ),
the magnification factor is given g
by:
Magnification Factor = 1/
(1-W )
+ 4N W 2
4 p
p where N/P = damping factor (as a fraction of critical)
(From " Vibration Problems in Engineering" by S. Timoshenko -
Page 40).
N/P Magnification 0.02 5.35 0.03 3.67 0.04 2.85 0.05 2.37 The fragilit*1 lirics established are 5.0g in both horizontal axis, and 3.0g in the vertical axis. The Fermi design require-ments are 1.59 in both horizontal axis and 0.149 in the vertical
~
axia. In this case, the fragility limitc are enveloping the input magnified forces, using 5% damping.
,t Attachment to EF2 - 54,390 Page 2 OPEN ITEM #7 G. E. Relay:
SQRT' Audit Item #22 Provide amplification of Panel Hil-P617, by August 31, 1981.
Response: Attached is a copy of G.E. Test Report Cofrentes H 13 - P618; DRF #H13-42. Panel Hil-P617 at Fermi is similar to Panel H13-P618.
OPEN ITEM #8 G. E. Rack: SQRT Audit Item #24 Provide report (s) to show that resonance in side to side.and vertical-direction is higher than that in front to back direction by August 31, 1981.
Response: Attached is a copy of G.E. Test Report Cofrentes H22-P017B-i H22-P018-H22-P005: DRF #H22-13.
Panel H21-P025 at Fermi is similar to Panel H22-P018.
-OPEN ITEM #1a j
Provide updated list of equipment which was either not qualified or
^
not installed at the time of SQRT Audit, by August 31, 1981.
f Response: With construction still in progress and some equipment yet to La purchased and qualified, Project Management has determinid j
that an effectiva way of handling this matter is to periodically update the SQRT list starting January 15, 1982, and every six-months thereaf ter, until ccrimercial operation.
OPEN ITEP #2a Provide list of equipment that is listed in the Equipment Summary list but is.no longer considered safety related, by August 31, 1981.
4
Response
e G.E. supplied steam dryer.
This item is identified as non-essential in Equipment Summary List Table Ifon Page 1.
e_G.E. supplied feedwater sparager.
This item is identified as non-essential in Equipment Summary List Table Ifon Page 1.
, _ - _ _ _, _. _ _. -, _.. _ _ _ _,. ~.... _
1 I
Attachmtnt to EF2 - 54,390 Paga 3 OPEN ITEM 2a'(cont.)
4 t
e G.E. supplied in-core guide tube.
As reported to your-Dr. Arnold Lee earlier, this item is not considered safety related.
1 I
e G.E. supplied steam separator.
This item is identified as non-essential in Equipment Summary List Table Ifon Page 5.
l Updating would be done as required, i
OPEN ITEM 43L i
Provide the summary results of the Equipment Seismic Qualification Reassessment based on the use of 5% structural damping instead of 7%
and a table similar'to Table 5.4-1 of July 15, 1981, submittal to NRC for components requiring requalification by August-31, 1981.
(
i In addition, provide a complete list of floor response spectra with respect I
to 5% structural damping, by August 31, 1981.
I Response: We presented the status of our investigation on this item in a conference call by our Yogi Anand with you and your Dr. P.T. Kuo, Dr.~ Arnold Lee, Dr. Goutam Bagchi, and Dr. C. P. Tan.
A copy of our investigation with pertinent attachments would be sent i
to you by September 4, 1981.
1 i
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