ML20059H400
| ML20059H400 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 09/07/1990 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20059H394 | List: |
| References | |
| NUDOCS 9009170141 | |
| Download: ML20059H400 (3) | |
Text
6
\\
7 UNITED STATES -
f pg
- NUCLEAR TIEGULATORY COMMISSION r,
i wA:HINGTON, D. C. 20666
%e...+*
ENCLOSURE 4 SAFETY EVALUATION BY~THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMFNDHENT NO, 175 TO FACILITY OPERATING LICENSE-NO.' DPR-33 l
AMjNDMENT NO.178 TO FACILITY OPERATING LICENSE NO. OPR-52
'AHENDMENT-NO. 146 TO FACILITY OPERATING LICENSE NO. DPR-68 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT, UNITS 1.-2 AND 3-DOCKET NOS.- 50-259,:50-260 AND 50-296
1.0 INTRODUCTION
\\
On April 19, 1990, Tennessee Valley Authority (TVA) proposed to revise-the Browns Ferry Nuclear (BFN) Plant Technical Specification (TS) by removing reference to the fixed in line' rotometer listed in the Table 3.2.D. " Radioactive Liquid Effluent Monitoring-Instrumentation."'
Thir TS change was necessitated by a mou 'cetion to the radwaste system which replaced the existing non-safety-related wn and low-flow loop radwaste:
1 discharge line rotometer flow indicating transmitters with a single ultrasonic i
transit time flowmeter. ~The ultrasonic flowmeter will be installed on a common-radwaste discharge line and will measure any effluents beiry discharged. This 1
modification is being made because the existing rotometers-have not demonstrated the desired flow measurement accuracy or reliability.
2.0 EVALUATION' The liquid radwaste syster collects, processes, stores, and disposes of all F
radioactive liquid wastes. The sources of radioactive liquid wastes are primarily-from equipment drain sumps, reactor cleanup systems, decant from the cleanup and condensate phase separatorsc floor drain; sumps, the chemical waste tank, Residua 1' Heat Removal system laboratory and decontamination drains, the radwaste building floor drain sump, radioactive laundry operations., and i
decontamination solutions containing detergents. The ultrasonic flowmeter is part of theccontrol' loop which controls,-
of the radwaste liquid effluent dischargemeasures, and records the flowrate This control loop is not required for safe shutdown of the plant, but it'does monitor and' control the flow of nore.a1 offsite discharges to ensure compliance with the requirements of-10 CFR 20.
Malfunctions of the flow measurement and recording loop -(of which the new ultrasonic flowneter is a part) can be compen~..ed for by alternate measurement techniques detailed in plant surveillance instructions.
h0 f $ $ $$00Sb59 p
,a~, '
y
w L
+.
. The proposed TS change and its associated modi'ication does not adversely, impact
)
the. normal radioactive effluent discharge cone ntrations from the radwaste system, so there will 'ue no increase in the radiological dose to the public. No accidents, transients, or events described in the. plant Safety Analysis Report _are initiated i
by failure of this flowmeter or the control. loop of which. it is a part.. The.
~
rodification will in fact enhance the accuacy and reliability of equipment used
' to measure liquid radwaste discharges. - A such, the NRC staff concludes that TVA's proposed TS change is acceptable.
3.0 ~ENVIR0ftENTAL CONSIDERATION The amendments. involve a~ change to a requirement with respect to installation I
+
m
_ or use of a facility component located within the restricted area as defined i
in:10 CFR part 20. The staff has determined that these emendments involve no s49nificant increase in the amounts, and no significant change in the types, of 1
any effluents.that may be released.offsite, and that there is no significant increase in individual or cumulative occupational radiation exposure.
The Commission has previously issued a proposed finding that'these amendments involve no significant hazards consideration and there has been no public comment on such finding. Accordingly,-the amendments meet the'eli criteriaforcategoricalexclusionsetforth.in10CFR51.22(c)(9)gibility pursuant--
to 10 CFR 51.22(b), no e6vironmental impact statement nor environmental assessment need be prepared in connection with the issuance of:these amendments.
4.0 CONCLUSION
The staff has concluded, based on the considerations. discussed above, that:
1 (1) there is reasonable assurance that'the health ~and safety-of-'the will not be endangered.by operation in the pro)osed manner, and1(2) public such activities will be conducted in compliance wit 1'the Commission's regulations, and (3) the issuance 'f the amendments will not be inimical to the common i
defense and security nor to the. health and safety of the public.
Principal ContMbutor:
T. Ross Dated: September 7, 1990 m
i L
.p-r j,,
~~
k l AMENDMENT NO :175 FOR BROWNS FERRY I! NIT 1 DOCKET NO.-50-259, ANENDMENT NO. 178 FOR-BROWNS FERRY UNIT 2 - DOCKET NO. 50-260,1and AMEt:0 MENT HO.146 FOR BROWNS-- FERRY llNIT 3 - DOCKET NO. 50-296 DATED:
September 7. 1990-DISTRIBUTION:-
-Docket File-a HRC PDR Local PDR-Plant' Reading File-S. Varga i
.G.-Lainas:
d
'M. Krebs T. Ross.
D. Moran OGC -:
i D. Hagan E. Jordan G.' Hill (4. per docks.t)-
i W. Jones J. Calvo ACRS(10)
GPA/PA OC/LFMB i
w 1
0 'l l'O 4
\\[
'