ML19263C891
| ML19263C891 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 03/02/1979 |
| From: | Counsil W CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7903120307 | |
| Download: ML19263C891 (3) | |
Text
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CONNECTICUT YANKEE ATOMIC POWER COMPANY BERLIN, CO N N ECTIC UT P.O. BOX 270 H ARTFORD, CONN ECTICUT 06101 tatapuons 203-666-6911 March 2,1979 Docket No. 50-213 Director of Nuclear Reactor Regulation Attn:
Mr. D. L. Ziemann, Chief Operating Reactors Branch #2 U. S. Nuclear Regulatory Commission Washington, D. C. 20555
Reference:
(1)
W. G. Counsil letter to D. L. Ziemann dated February 27, 1979.
Gentlemen:
Haddam Neck Plant Additional Information In Reference (1), Connecticut Yankee Atomic Power Company (CYAPCO) submitted a license amcndment request to the NRC Staff which was initiated due to the replace-ment of eight (8) hydraulic snubbers with eight (8) mechanical snubbers at the Haddam Neck Plant.
In phone conversations on March 1,1979, the NRC Staff re-quested that CYAPCO submit additional information supporting this change.
In response to the NRC Staff requests, CYAPCO hereby submits the attached addi-tional information comparing the two types of snubbers.
In addition, CYAPC0 wishes to point out that a stress analysis of the four (4) feedwater lines in-side containment, to which the eight (8) snubbers are attached, indicates that applicable code allowable Ifmits are not exceeded even without the presence of the snubbers, either hydraulic or mechanical.
We trust that this information is responsive to your requests.
CYAPCO has concluded that with respect to the requirements of 10CFR170, this letter is covered by the remittance enclosed in Reference (1). Therefore, no payment is applicable.
Very truly yours, CONNECTICUT YANKEE ATOMIC POWER COMPANY 7
$N i
'W. G. Counsil Vice President
.ictachment 7 9 0 312 03d '
DOCKET No. 50-213 ATTACHMENT HADDAM NECK PLANT ADDITIONAL INFORMATION MARCH, 1979
a HADDAM NECK PLANT FEEDWATER LINE SNUBBERS The following is a comparison of Pacific Scientific PSA35 MECHANICAL SHOCK ARREST 0RS versus Grinnell Fig. 200 HYDRAULIC SHOCK ARREST 0RS:
Pacific Grinnell PSA-35 Fig.-200 Rating for Normal / Upset Load s 50,000 lbs.
32,000 lbs.
Breakaway Friction
< 350 lbs.
< 320 lbs.
Minimum Travel
> 6 inches
> 5 inches Limiting Velocity /Acc el.
.02 g*
6-15 in./ min. lockup 3-5 in./ min. bleed
- Note: The PSA-35 is an acceleration limiting device and will always allow movement if the load on the support exceeds the breakaway friction force.