ML20010E661

From kanterella
Jump to navigation Jump to search
Forwards Seismic Qualification Review Team Response to Open Items 6,7,8,19,29, & 39 Per 810813 Ltr
ML20010E661
Person / Time
Site: Fermi DTE Energy icon.png
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 Mr. L. L. Kintner U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation 2

1-h *J gh 6 Division of Licensing W2shington, D. C. 20555 Qv 90 Q

\/,

a4 b

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 Dr. Morris Reich d[

y l VO 8109000111 810831 DR ADOCK 05000341 PDR

~

l l

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
  1. 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 g) to driving frequency (W = 33 Hg ), the magnification factor is given 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.

! l

,t Attachment to EF2 - 54,390 l 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 4

OPEN ITEM 2a'(cont.)

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

a u

h' I

i

- wre,ww cm,,--,* w r,-vy+=,ev----rww.,--,-<, w,y,,,,w, rv-ow c..v-+ , .+~,-,s.-ee w , w- w-- w- -- r wya - =r w -ev + + e e w w" v"w * *r ye-