ML17053A931
| ML17053A931 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 08/09/1979 |
| From: | Rhode G NIAGARA MOHAWK POWER CORP. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17053A932 | List: |
| References | |
| NUDOCS 7908160450 | |
| Download: ML17053A931 (4) | |
Text
I REGULATO INFORMATION DISTRIBUTION TEM (RIDS)
RHODErG ~ K'iagara Mohawk Power
- Corp, REC IP ~ NAME RECIPIENT AFFILIATION DENTONiH ~ RE Office of Nuc1 ear Reactor Regulation
SUBJECT:
Requests r eview L approval of use of thr eaded splice method for reinforcing bar splicing in Category 1 structures, Forwards 761212 ASME code case approving method of splicing.
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TITLE: PSAR/FSAR AMDTS AND RELATED'CORRESPONDENCE' N
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O TE 8 ~ www>>ww>>w>>pew>>ww>>>>wwww>>>>wwwwwww>>www>>>>wwwwww>>wwwwwwwwe>>wwwwwwwwwwwwwwwwww ACCESSION NBR:7908160450 DOC,DATE: 79/08/09 NOTARIZED:
NO DOCKET FACIL'50-410 Nine Mile Point Nuclear Stationi Unit 2r Niagar a Moha 05000410 AUTH,NAME AUTHOR AFFILIATION RECIPIENT COPIES ID CODE/NAME LTTR ENCL ACTION:
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C SYS BR 22 AD SITE TECH 27 EFFL TRT SYS 29 KIRKWOOD AD PLANT SYS AD SITE ANLYSIS HYDRO METEOR BR OELD EXTERNAL: 03 LPDR 30 ACRS 1
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10 10 02 NRC PDR 08 OPERA LIC BR 10 QAB 12 STRUC ENG BR 15 REAC SYS BR 17 CORE PERF BR 19 CONTAIN SYS 21 POWER SYS BR 26 ACCDNT ANLYS 28 RAD ASMT BR AD FOR ENG AD REAC SAFETY DIRECTOR NRR M,PA 04 NSIC 1
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Q PgQoggg NIAGARAMOHAWKPOWER CORPORATION/300 ERIE BOULEVARDWEST, SYRACUSE, N.Y, 13202/TELEPHONE (315) 474-1511 August 9, 1979 Mr. Harold Denton, Director Office of Nuclear Reactor Regulations U.
S. Nuclear Regulatory Commission Washington, DE C.
20555
Dear Mr. Denton:
Re:
Nine Mile Point Unit 2 Docket No.
50-.410 Section 12.6.3 of the Nine Mile Point Unit 2 Preliminary Safety. Analysis Report describes cadwelded and welded splice methods for reinforcing steel for the Unit 2 project.
Niagara-Mohawk plans to utilize another method of splicing as described below.
The Dwidag Threadbar System uses standard grade reinforcing steel which has thread-like deformations rolled onto the entire length of the bar on opposing sides...
The continuous pattern allows the bar to be cut and joined at any point.
A splice may be achieved in one of two ways.
When bars with opposing thread patterns are joined, a coupler is threaded onto the end of one bar.
The bars are then aligned so that the coupler may be threaded onto the second bar, with the required torque:
For bars with the same thread pattern, hex or lock nuts are threaded over the ends of each bar and a coupler is threaded over the end of one bar.,
The bars are aligned so that the coupler may be threaded.back.to cover both bars.
The nuts are then torqued against the coupler to hold the splice.
Reinforcing bar splicing utilizing the threaded splice method has been approved by ASME Section III, Division 2 in Code Case 1758 (attached).
dated December 12, 1976.
Niagara Mohawk will comply with the material, installation, testing and examination requirements outlined in the Code Case.
Your expeditious review and approval of the use of the threaded, splice method for reinforcing bar splicing in Category,.I structures is requested.
Very truly yours, NIAGARA MOHAWK POWER CO RATION gyral I
Attachment erald K.
ode Vice Presi ent System Project management Za 08160
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