NUREG/CR-4461, Requests Assistance in Achieving Mod of Reg Guide 1.76 Re Tornado Design Criteria,Based on NRC Recommendation in NUREG/CR-4461 & Initial Response to EPRI Declining to Adopt ANSI/ANS-2.3-1980 Std
| ML20216B385 | |
| Person / Time | |
|---|---|
| Issue date: | 06/23/1987 |
| From: | Berkow H Office of Nuclear Reactor Regulation |
| To: | Liza Cunningham Office of Nuclear Reactor Regulation |
| References | |
| PROJECT-669A, RTR-NUREG-CR-4461, RTR-REGGD-01.076, RTR-REGGD-1.076 TAC-62059, NUDOCS 8706300071 | |
| Download: ML20216B385 (2) | |
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.c r June 23, 1987 Project No. 669 ]
l MEMORANDUM FOR: L. J. Cunningham, Acting Chief, Radiation -f Protection Branch, Division of Radiation i Protection and Emergency Preparedness f FROM:' Herbert N. Berkow, Director l Standardization and Non-Power ,3 Reactor Project Directorate 1
Division of Reactor Projects III, IV,
.V and Special Projects
SUBJECT:
MODIFICATION OF R. G. 1.76 re TORNADO DESIGN The purpose of this memorandum is to request your assistance in achieving a modification of Regulatory Guide 1.76 with respect to tornado design criteria. As Irvin Spickler of your branch is aware, EPRI has proposed such a revision to allow the use of ANSI /ANS-2.3-1980 for determining tornado wind loads on plant buildings and missile barriers. Although our initial response '
to EPRI declined to adopt the ANSI standard, we indicated that the staff would q recommend revision of RG 1.76 based on an analysis of tornado statistics by '
PNL, which is documented in NUREG/CR-4461.
In the ALWR Requirements Document, which is presently being reviewed by the -l staff, Table 2-1 inclndes site design parameters based on the ANSI standard. 1 Rather that rejecting them outright, it would be preferable if we can state l what is acceptable for future ALWR plants, based on a' revised RG 1.76, or a {
proposed revision thereof.
l This 'is a matter of considerable urgency since the structural requirements for the ALWR, the ABWR and other standard plants are currently being formulated. Please confirm that you will accept this assignment and inform-the ALWR Project Manager, Paul Leech (X28209), of your schedule for its 4 completion. Use TAC # 62059 for this effort. 1 i
Orignial signed by +
Herbert N. Berkow, Director Standardization and Non-Power Reactor Project Directorate Division of Reactor Projects III, IV, V and Special Projects DISTRIBUTION (Central: Files G. Bagchi T. Kenyon G. Vissing H. Berkow
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...../ June 23, 1987 _ q Project No. 669 MEMORANDUM FOR: L. J. Cunningham, Acting Chief, Radiation Protection Branch, Division of Radiation Protection and Emergency Preparedness FROM: Herbert N. Berkow, Director Standardization and Non-Power Reactor Project Directorate Division of Reactor Projects III, IV, Y and Special Projects- q
SUBJECT:
MODIFICATION OF R. G. 1.76 re TORNADO DESIGN The purpose of this memorandum is to request your assistance in achieving a '
modification of Regulatory Guide 1.76 with respect to tornado design criteria. As Irvin Spickler of your branch is aware, EPRI has proposed such . ,
a revision to allow the use of ANSI /ANS-2.3-1980 for determining tornado wind loads on plant buildings and missile barriers. Although our initial. response 1 to EPRI declined to adopt the ANSI standard, we indicated that the staff would recommend revision of RG 1.76 based on an analysis of tornado statistics by PNL, which is documented-in NUREG/CR-4461.
In the ALWR Requirements Document, which is presently being reviewed by the staff, Table 2-1 includes site design parameters based on the ANSI standard.
Rather that rejecting them outright, it would be preferable if we can state ;
, what is acceptable for future ALWR plants, based on a revised RG 1.76, or a '
j proposed revision thereof.
This is a matter of considerable urgency since the structural requirements .
for the ALWR, the ABWR and other standard plants are. currently being j formulated. Please confirm that you will accept this assignment and inform the ALWR Project Manager, Paul Leech (X28209), of your schedule for its completion. Use TAC #62059 for this effort.
d erbert N. Berkow, Director Standardization and'Non-Power Reactor Project Directorate Division of Reactor Projects III, IV, V and Specia.1 Projects ,
i
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