ML18043A867
| ML18043A867 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 07/27/1979 |
| From: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7907310432 | |
| Download: ML18043A867 (3) | |
Text
consumers Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201
- Area Code 517 788-0550 July 27, 1979 Director, Nuclear Reactor Regulation Att Mr Dennis. L Ziemann, Chief Operating Reactors Branch No 2 US Nuclear Regulatory Commission Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT -
INFORMATION REQUESTED ON PWR FEED-WATER LINES
- ~'
By letter dated May 25, 1979 (V Stello to all PWR Licensees concerning cracking in feed-water lines at DC Cook Units 1 and 2), you req_uested information concerning the Palisades feed-water lines.
Consumers Power Company responded on June 19, 1979 with the information available at that time.
Following is the remainder of that information req_uested.
Items are numbered as in the original req_uest for information.
I.
DESIGN Item 2 Provide the results of any stress or fatigue analyses which were performed for this system (feedwater).
Response
Combustion Engineering Inc is in the process of retrieving this information for all CE plants.
We will supply it when it becomes available.
II.
FABRICATION HISTORY Item 2 Provide the details of the welding process(es) used to make the nozzle-to-pipe, pipe to sparger and piping welds.
Include details of welding such as preheat, joint configuration (include with or without backing ring),
and post weld treatment, if any.
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Response
- 2.
Welding Process Pipe to Pipe:
(Field Weld)
The first two passes were TIG; subsequent passes were made with the shielded metal arc process.
(Bechtel Procedure:
Pipe to Safe End:
Preheat Pl-AT-Lh)
The first two passes were TIG; subsequent passes were made with the shielded metal arc process.
Pipe to Pipe:
None specified.
(Field Weld)
Pipe to Safe End:
200°F.
Joint Configuration Pipe to Safe End:
See CE Drawing E-232-940 for Safe End Weld Prep.
See Bechtel Drawing 5935-M-240, Sheet 3 of 6, for Pipe End Weld Prep.
Note the absence of backing rings.
Post Weld Heat Treatment Pipe to Pipe:
1150°F ~ 25°F.
(Field Weld)
Pipe to Safe End:
1150°F + 25°F.
Item 3 Provide -the NDE performed during and after fabrication* of the weld joints requested in question 2.
Response
NDE History of Welds Pipe to Pipe:
(Field Weld)
Pipe to Safe End:
3 Item 4 Provide the Code edition to which the feedwater piping system was fabricated.
Response
The 1967 Edition of USAS B31.l.O was used to design the feed-water piping at the Palisades Plant.
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David P Hoffman Assistant Nuclear Licensing Administrator CC JGKeppler, USNRC