ML20002E460
| ML20002E460 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 01/22/1981 |
| From: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8101280093 | |
| Download: ML20002E460 (3) | |
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Geners! Of f ces 212 We,t MicNgan Avenue, Jackson. MI 49201 * (517) 788 C550 a
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Mr Dennis M Crutchfield 2
Sig Rock Point Plant January 22, 1981 1.
Number of syste=s or components serviced or affected by the ite=.
2.
Proximity to other safety-related equipment and to other items being modified.
3 Ability to modify during plant operation.
k.
Availability of final designs.
The general approach to determining the need for and design of modifications was as follows:
1.
Develop floor response spectra for the areas of interest.
2.
Using the appropriate spectra, analyze the existing equipment configuration to determine adequacy.
3.
If analysis showed inadequate or marginal support, determine appropriate modifications and perform verification analyses.
L.
Finalize design drawings and r:rify feasibility of propcsed modificatiens.
5 Perfor= :odification.
It was the intent of Consumers Power Company to complete all modifications by Dece=ber 31, 1980.
Final designs, however, were directly dependent on the floor response spectra which were received too late to support thic late. At the time of our telephone conference, two items were complete and the +::aining items were being pursued on a priority basis. It is our intent to ec=p]2te the remaining priority 1 items, with the possible exception of ite: 11_(10.ated in the screen-how ;) prior to bringing the plant on line from the present refueling outage.
Tb se priority 1 items are important for plant operation, affect many components and are in close enough proximity to each other to =ake it imprudent to work on them during plant operation. Work on the remaining items will continue with the plant on line.
It is expected that eight weeks vill be required to complete the remaining modifications. Therefore, all modifications are expected to be complete by April 1, 1981.
i Oavid P Hoffman (Signed) l l
David P Hoff=an Nuclear Licensing Administrator CC Director, Region III USNRC NRC Resident Inspector - Big Rock Point l
Attachment l
l I
4 AT*ACIDI::T 1 BIG ROCK POI:iT PLtdiT A';CHCRACE AI-u SUFFORT OF SAFE"LBELATED ELECTE! CAL ET.U!PME::T
! tem ?!o ser'ination Description of Modification Priority 2
EDG Mocs Heater Eliminate friction clanp 3
L EDG Battery Analyzed as acceptable NA 8
EDG Water tank Chain to I beam 3
9 DTP 3attery Wrap / anchor frame Done 11 v.CC 10, 2C Add anchor to floor 1
12 CFP panel Add anchor to wall Done 13 EFP panelC-17 Add anchor to floor J
IL Hypo tant Brace 3
16 Junct taxes Analyzed as acceptable NA 17 Ship container Chain to wall 3
19 Comput er Add anchor to floor 2
20 Sta battery rack New rack 1
25 125 VDC MCC Add anchor to floor 1
27 MCC 1A Add anchor to floor 1
28 Mg set Panel Add anchor to floor 1
29 MCC 23 Add anchor to floor 1
30 MCC 2A Add anchor to floor 1
31 h80V load center Add anchor to flocr 1
36 Air compressor panel Analyzed as acceptable NA l
37 Panel C-30 Add anchor to floor 2
38 MCC 2D Add anchor to floor 2
39 Panel C-20 Add anchor to floor 2
L1 Panel 2P Brace 2
LL Panel C-26 Brace 3
l 52 Main Panels Add anchor to vall 2
1 Col, CO2 N2 bottle rack Replace chains 3
"0T=~" 1.
Table includes all items judged on a preliminary basis to require l
~
modifications in March 31, 1900, submittal, even if subsequent analyses showed modifications not required.
l 2.
All items in March 31, 1980, submittal which do not appear in this table have been verified acceptable by analysis.
3.
Item numbers correspond to those in CPCo submittal of March 31, 1980.