ML20050B585

Submits Info Re Comparison of Facility Lifting Devices to ANSI 14.6-1978 Design & Mfg Criteria & Status Rept of Actions Taken to Meet Intent of NUREG-0612.Head Strongback & Dryer/Separator Sling Assembly Satisfy ANSI Criteria

ML20050B585
Person / Time
Site:	Vermont Yankee
Issue date:	04/01/1982
From:	Jackson E VERMONT YANKEE NUCLEAR POWER CORP.
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
REF-GTECI-A-36, REF-GTECI-SF, RTR-NUREG-0612, RTR-NUREG-612, TASK-A-36, TASK-OR FVY-82-37, GL-81-07, GL-81-7, NUDOCS 8204060090
Download: ML20050B585 (10)

Text

-

L

~

,f VERMONT Y AN KEE NUCLEAR POWER CORPORATION SEVENTY SEVEN GROVE STREET 2.C.2.1 RUTI,AND, VEltMONT 05701 FW 82-37 REPLY TO:

ENGINEERING OFFICE 1671 WORCESTER ROAD FR AMINGH AM, M ASS ACH US ETTS o1701 TELEPHONE et7 e72-eloo April 1, 1982 United States Nuclear Regulatory Commission We3hington, D.C. 20555 Attention: Office of Nuclear Reactor Regulation Mr. Darrell G. Eisenhut, Director Division of Licensing

References:

a) License No. DPR-28 (Docket 50-271) b) Letter, USNRC to WNPC, dated February 3,1981 c) Letter, WNPC to USNRC, FW 81-91, dated June 10, 1981 d) Letter, WNPC to USNRC, dated December 30, 1975 e) Letter, WNPC to USNRC, dated June 2,1976 g g' f) Letter, USNRC to WNPC, dated January 28, 1977/ 9 7 Q, g) Letter, WNPC to USNRC, dated September 11, 98F '/

h) Draf t TER, FRC to WNPC, received December 1 d1981'.c '!.: -) Ye

1) Telecon, WNPC to USNRC, dated March 15,198 ~ , )gg g 1

Dear Sir:

9 C U' u

[f h' .

Subject:

Control of Heavy Loads

(Bending Extensions) + 3 2 1/2" Turnbuckles 2.99* ,

[ 14.90 1 1/2" Wire Rope 8.20 Hook Box (Bending 6.94 11.36 (large) in Cross Plates)

Hook Box (Tension) 9.82 16.10 (large)

Hook Pin (Bending) 10.40 17.30 (large) ,

2a. Wire Rope - It should be noted that the exact wire 2 rope used was not specified on the drawings. G.E. Drawing No.~730E763 calls

> for11/2" Diameter,6/19'wirerope,non-lubricated, corrosion resistant steel by J.A. Roebling Corp. or equal. Since~then, Roebling has been acquired by Bethlehem Steel and it was not possible to obtain original data from Roebling. However,

" Riggers Bible" (R.P. Leach, Master Printers, 1976) lists for following breaking. strengths for Roebling 1 1/2". diameter, 6x19 wire rope: ,.-

t

a. Bright, I.W.R.C. j '

98.9 Tons

b. Bright, Fiber Care' .

92.0 Tons,

c. Calvanized, FiM ; Care- 82.8 Tons We were informed by N bh tem Steel that their catalog contain's no 1 1/2" diamett , c .30 re rope, but does contain 1 1/2" diameter, 6x25 wie rey, Mach has the following breaking r strength-

a. Bright', Wire Center -98.9 Tons

b. Bright, Fiber Core 92.0 Tons .

c. Galvanized, Wi're Center 89.0 Tons

d. Galvanized, Fiber Core SI 8 Tons 4

f

LU.S. Nuclair Ragulstery Commiccion .

. April 1, 1982' Page 4 VERMONT YANKEE NUCLEAR POWER CORPORATIOA It appears that only the designation has changed (from 6x19 to 6x25; it should be noted that the old "6x19" designation allowed anywhere from 16 to 25 wires to the strand), so it was conserva-tively assumed that galvanized wire rope with a fiber core was used on the Vermont Yankee dryer / separator sling in determining wire rope safety factors in Table 2.

2b. Location of Load on Socket Pin - The drawings do not show the exact location of the loads from the dryer or separator as they are applied to the socket pins. The socket pin spans in the bell housing, a clear distance of 7-3/8", and has a 3/8" support plate in the middle. In determining socket pin safety factors in Table 2, it was assumed that the load is applied on the socket pin midway between 3/8" plate and the outer bell housing plate.

Based on factors of safety shown in Tables 1 and 2 for the head strongback and the dryer / separator sling assembly, it is judged that these devices satisfy the intent of ANSI N14.6-1978.

II. Clarification of Item 3d, first paragraph, page 19 of Reference (g):

"Other special and general purpose slings are covered by criteria added to load handling procedures that meet the intent of ANSI B30.9 for sling selection and use as well as inspection and maintenance."

The commonly used document that governs the manner in which wire rope slings are utilized at Vermont Yankee is the Rigger's Handbook, One Hundredth Anniversary Issue, supplied by Broderick and Bascom Rope Company.

This document is based on and comparable to ANSI B30.9, therefore Vermont Yankee considers this document one and the same as ANSI B30.9. It is Vermont Ysnkee's intent to continue utilizing the Rigger's Handbook since it is a handy tool which our plant mechanics can easily keep in their tool storage areas.

In August of 1981, a 32 man-hour training program was completed by most of Vermont Yankee's shop personnel. This program, presented by New England Power Service Company, included hoisting, rigging, and operator training.

During the Overhead Crane Portion of the program shock and dynamic loading was discussed in detail.

Vermont Yankee is confident that present sling selection practices are comparable with ANSI B30.9. However, a reference to ANSI B30.9 has already been added to OP 1200 and OP 1201, the disassembly and assembly procedures for the Reactor Vessel.

III. Statement in regard to Interim Action (5):

Upon receipt of the NRC Ceneric Letter 81-07, special attention was given to procedures, equipment, and personnel for the handling of heavy loads over the core. Deficiencies noted at the time were mainly in the Operator

'U.S. Nuc1ccr R2gulctory Commis2 ion April 1, 198'2 VERMQNT YANKEE NUCLEAR POWER CORPORATIO2 Page 5 Qualification area. These deficiencies were corrected prior to May 15, 1981 via a training session. The training session consisted of pertinent sections of ANSI B30.2 and a presentation of the consequences of a load drop per NUREG 0612.

IV. Status of actions that are the results of Vermont Yankee's review of NUREG 0612:

Several procedures are now revised along with the development of two new procedures. All subject procedures are currently in the review cycle and will be impicmented by March 31, 1982 or shortly thereafter. Derating on the Refueling Floor Jib Cranes and the Refueling Platform Hoist will also be accomplished within the above timeframe.

Vermont Yankee concludes that the actions described in this letter adequately address the topics agreed upon during Reference (i); however, should you have further questions, please contact us.

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION Earl W. kson Manager f Operations EWJ/dm L