ML20009H574
| ML20009H574 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 07/31/1981 |
| From: | Tramm T COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8108100261 | |
| Download: ML20009H574 (2) | |
Text
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7 Commonwealth Edison
) Ons First NItional Plaze, Chicago, Ilknois c
O' Address Reply to: Post Office Box 767
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Chicago, Illinois 60690 July 31, 1981 e
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Mr. Harold R. Denton, Director 6
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Office of Nuclear Reactor Regulation g
h U.S. Nuclear Regulatory Commission LJ; p
Washington, DC 20555
/100 g 7 q
k'&
McD'ont
Subject:
Byron Station Units 1 and 2 g
AN N
Braidwood Station Units 1 and 2 '
Ulitization of ASME Code Case N-235 NRC Docket-Nos.- 50-454/455/456/457
Dear Mr. Denton:
This is to inform you of our intent to make use of ASME Code Case N-235, regarding calibration checks using automated ultrasonic examination systems.
A copy of the approved Code Case is attached.
This Code Case was approved by the ASME Council on January 8,
1979.
It allows more efficient construction by extending the calibration interval for automatic ultrasonic examination systems.
Commonwealth Edison requests that the NRC staff acknowledge acceptability of the Code Case'for immediate use at Byron and Braidwood Stations.
One (1) original and thirty-nine (39) copies of this. letter letter and the attachment are enclosed for your use.
Very truly yours, ff2[,4pw_
T. R. Tramm Nuclear Licensing Administrator Attachment 1m 2359N Yo\\
vp g8100261810733 A
ADOCK 05000454 PDR-
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CA5E O
N-235 CASES OF ASME BOII.ER AND PRESSI,RE VESSEL CODE Meeting of November 3, I978 Approved by Council, January 8, !979 This Case shall expire on January 8, I982 unless previously annulled or reaffirmed.
Case N 235 dent with a change of operator personnel?
Ultrasonic Calibration Checks per Section V Section XI, Division 1 Replyr It is the opinion of the Committee that, when performing Section XI ultrasonic examinations in accord.
Inquiry: In performingSection XI ultrasonic examina-ance with Article 4 of Section V,if automated ultrasonic tions in accordance with Article 4 of Section V, when examination systems are used, the time ne.iod between using automated ultrasonic examination systems, may calibration checks required by T 432.1.2 may be ex.
the time period between calihrstion checks required by tended to 12 hrand need not be coincident with a change T 432.1.2 he extended to 12 hr and need not be coinci-in operator personnel.
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