ML20248D195
| ML20248D195 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 05/27/1998 |
| From: | Abney T TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9806020341 | |
| Download: ML20248D195 (3) | |
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Tennessee Valley Authority, Post offee Box 2000, Dcoatur, Alabama 35609-2000 May 27, 1998 U.S. Nuclear Regulatory Commission ATTN:
Document Control Desk Washington, D.C.
20555 Gentlemen:
In the Matter of
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Docket Nos. 50-259 Tennessee Valley Authority
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50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) - UNITS 1, 2, 3 - RESPONSE TO VERBAL REQUEST FOR ADDITIONAL INFORMATION REGARDING TECHNICAL SPECIFICATIONS (TS) CHANGE REQUEST TS-362 - IMPROVED TS (ITS)
- SECTION 3.6.4 - SECONDARY CONTAINMENT This is in response to a question posed by the NRC staff on May 20, 1998, concerning TVA's TS change request (TS-362) to convert BFN current TS (CTS) to Improved TS consistent with NUREG-1433, Revision 1,
" Standard Technical Specifications for General Electric Boiling Water Reactors (BWR/4)."
TS-362 was submitted to NRC on September 6, 1996.
As part of the ITS conversion, TVA proposed to revise Units 1, 2,
and 3 CTS Sections 3.7.C.3, 3.7.C.4, and 4.7.C.2 to eliminate the existing CTS alternative which provides, in the event of loss of the secondary containment operability in the common refueling zone, that the refueling zone be isolated from the three reactor buildings ventilation zones, and power operations continued.
For this situation, proposed ITS 3.6.4.1 will require refueling zone operability be restored within four hours or the units be shutdown in accordance with the NUREG-1433 standard times for secondary containment inoperability.
Hence, in ITS the secondary containment is treated as a single contiguous volume.
This is i
j O consistent with NUREG-1433.
i Y
9006020341 990527
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PDR ADOCK 05000259
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U.S. Nuclear Regulatory Commission
,Page,2 i
-May 27, 1998-l NRC Question If the zone concept is not now utilized in the secondary containment, is this consi..ent with emergency operating procedures and other aspects of the BFN licensing basis with~
' respect to possible entry into the secondary. containment under l
emergency conditions to assist in the shutdown of a unit or mitigation of an' accident in a unit?
E9L Response The. proposed change is fully consistent with BFN's emergency operating procedures and licensing basis regarding entry into the secondary containment.. Operator actions in the secondary containment are not relied upon in the BFN licensing basis for mitigation of a design basis accident or normal shutdown.
BEN Emergency Operating Instructions (EOI): allow for operator actions which involve entry into secondary containment.
However, these actions are performed only if plant conditions allow.
If entry'into the secondary containment is desirable (e.g.,
equipment failure, inspection, etc.), various reactor building radiation monitors provide control room indications and alarms as described in-the BFN FSAR Section 7.13.
These monitors
- provide information to determine whether a reactor building entry is appropriate and the need for protective equipment (e.g.,
self contained breathing apparatus).
If you have any questions regarding this matter, call me at (256) 729-2636.
p[ncerel,,.
Q,
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Manager of Lic si ng and Indust Aff irs cc: ' See pag 2
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U.S. Nuclear Regulatory Commission Page 3 "May 27, 1998 cc:
Mr. Albert W.
De Agazio, Project Manager U.S. Nuclear Regulatory Commission
.One White Flint, North I
11555 Rockville Pike Rockville, Maryland 20852 Mr. Lakshminaras Raghaven U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. Harold O. Christensen, Branch Chief U.S. Nuclear Regulatory Commission Region II 61 Forsyth Street, S. W.
Suite 23T85 Atlanta, Georgia 30303 NRC Resident' Inspector Browns Ferry Nuclear Plant 10833 Shaw Road Athens, Alabama 35611 State Health Officer Alabama Department of Public Health 434 Monroe Street Montgomery, Alabama 36130-1701
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