ML19338F053
| ML19338F053 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/01/1980 |
| From: | Trimble D ARKANSAS POWER & LIGHT CO. |
| To: | Novak T Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-12, REF-GTECI-EQ, TASK-A-12, TASK-OR 2-100-02, 2-100-2, NUDOCS 8010070461 | |
| Download: ML19338F053 (2) | |
Text
_ _ _ _ _ _
EMEF"'
i mesw e
ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 LITTLE ROCK. ARKANSAS 72203 (501) 371-4000 October 1, 1980 2-100-02 Mr. T. M. Novak Operating Reactors Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Arkansas Nuclear One-Unit 2 Docket No. 50-368 License No. NPF-6 Fracture Toughness of S/G and RCP Supports, Response to Item 3.0 Subtopics (a) and (b)
(File:
2-1510)
Gentlemen:
In our letter to you of August 19, 1980, we reported that the information to respond to Item 3.0 Subtopics (a) and (b), of your letter of August 5, 1980, would be forthcoming.
The following information is provided to a.ddress these specific items.
Response
Item 3.0 (a)
Drawing 234-803 Detail
'B' (Support skirt to stay ring)
Detail 'E' (Support skirt to flange)
Weld Process Submerged Arc & Shielded Metal Arc Process Electrode Submerged Arc - 3/16" B-4 Shielded Metal Arc - 1/8" - 1/4" E-8018 C-3 Flux Submerged Arc - Linde 0091 Weld Parameters Submerged Arc - 1st Layer 500V AC @ 30A Remainder 650V AC @ 30A Shielded Metal Arc - 115-375 V DC (RP) @ 25A Heat Treatment - 1) Preheat & Interpass - 250 F min. - 500 F max.
- 2) PWHT 1100 F + 25, I hour per inch of thickness
Detail 'G' (support skirt longitudinal welds)
Weld Process
-Sbielded Metal Arc Electrode
-1/8 - 1/4" E-8018 C-3 Weld Parameters 115-275V DC (RP) @ 25A Heat Treatment -1) Preheat & interpass - 250 F min-500 F max
-2) PWHT 1100 F i 25, I hour per inch of thickness.
-3) PWHT Temperatures were monitored via thermocouples attached to the weld joint.
ohs 1007olj(
MEMBER MIDOLE SOUTH UTILITIES SYSTEM
k During fabrication, the following NDT was required to be performed to satisfy the Summer 1970 Addenda of the ASME Code and to comply with normal shop practice.
)
1)
Detail 'B'-Mag Particle (MT) Examine a) Backchipped Root Layer and b) Final Surface, Both sides
-Radiograph (RT) Examine a) Final Weld 2)
Detail 'E'-MT a) Backchipped Root Layer b) Final Surface, Both Sides 3)
Detail 'G'-MT a) Backchipped Root Layer b) Final Surface, Both Sides The above mentioned support skirt to stay ring weld (Detail 'B') was includgd in the Insgrvice Inspection baseline program and was UT inspected o
with 0, 45 and 60 beam = 711 with acceptable results.
The remaining welds (Detail
'E' suppe.
- strt to flange and Detail 'G' support skirt longitundinal welds) / d not receive any subsequent inspections as they are not required to be included in the inservice inspection program.
Item 3.0(b)
Drawing 234-804 Section AA (Key to Shell)
Section CC & EE (Lug to Shell)
Weld Process
-Shielded Metal Arc Electrode
-1/8 - 1/4" E-8018-C3 Weld Parameters 115-275 V DC (RP) @ 25A Heat Treatment -1) Preheat & Interpass - 250 F min - 500 F max
- 2) PWHT - 1100 F i 25, I hour per inch - 1 thicknesa
During fabrication the following NDT was required to satisfy the Summer 1970 Addenda of the ASME Code and to comply with normal shop practice.
1)
Section AA, CC, EE - MT a) Backchipped Root b) Final Surface, Both Sides The above mentioned key to shell and lug to shell welds were included in the Inservice Inspection baseline program and were surface dye penetrant examined with acceptable results.
The above information represents all information available for our response to these specific topics. This concludes our effort on Itea 3.0 Subtopics (a) and (b).
Very truly yours,
. Odd. &
David C. Trimble j
Manager, Licensing DCT:DEJ:nak