RC-90-0138, Suppl 2 to Application for Amend to License NPF-43, Clarifying Accident Monitoring Instrumentation Requirements for Standby Gas Treatment Sys Radiation Monitors Contained in Tech Spec 3/4.3.7.5

Suppl 2 to Application for Amend to License NPF-43, Clarifying Accident Monitoring Instrumentation Requirements for Standby Gas Treatment Sys Radiation Monitors Contained in Tech Spec 3/4.3.7.5

ML20059J816
Person / Time
Site:	Fermi
Issue date:	09/11/1990
From:	Orser W DETROIT EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20059J820	List: ML20059J825 RC-90-0138, Suppl 2 to Application for Amend to License NPF-43, Clarifying Accident Monitoring Instrumentation Requirements for Standby Gas Treatment Sys Radiation Monitors Contained in Tech Spec 3/4.3.7.5
References
SRC-90-0138, TAC-72049, NUDOCS 9009200194
Download: ML20059J816 (5)

Text

.

IJ7vb WE,o ni M2 p.m.a l Edison EEA*" 1 r m*.v.,  !

i September 11, 1990 i 10C-90-0138 i i

U. S. Ibclear Regulatory Consission. .!

Attn Docunent Control Desk Washington, D. C. 20555  :

references: 1) Fermi 2

, -lec Docket No. 50-341 IGC License No. !@F-43 f

2) Detroit Mison Letter to NIC,10C-88-0189,  ;

~

" Proposal %chnical Specification Change)

(License Anandnent) - Accident Monitoring Instrunentation (3/4.3.7.5), Drywell. and ,

Suppression Chamber Oxygen Concentration ,

(3/4.6.6.2), and Special Test Exceptions - ,

Oxygen Concentration (3/4.10.5)", dated -  !

November 15, 1988 .

f t

3) Detroit R11 son Letter to NIC, NIC-89-0228, "Supplenent to Proposed hchnical Specification Change (License AnenSnent) - Accident Monitoring Instrunentation (3/4.3.7.5) (TAC No. 72049)",

I dated November 16, 1989 +

Subject:

Supplement (2 to Proposed Technical Specification Chmige (License Anendment) .- Accident Monitoring Ins trumntat hm (3/4. 3.7. 5) (TAC No.- 72049)

Pursuant to 10CFR50.90, Detroit Edison Conpany hereby proposes to anerx1 Operating Licence !@F-43 for the Fenni 2 plant by incorporating the enclosed changes into the Plant Technical Specifications. The ,

r Reference 2 submittal propose $, anong other things, to clarify the accident nonitoring instrunentation requirenents for the Standby Gas '  :

, Treatnent System Radiation Monitors which are contained in Technical eu Specification 3/4.3.7.5. The Reference 3 submittal proposed to

'C$$ supplenent the Reference 2 submittal by including an additional gC' instrunentation range to the Standby Gas Treatment System Radiation o8 Monitors. ' The NIC staff has concluded that thelorWUting of the

• -t proposed wording as specified in References 2 and 3 is unclear with i ff respect to the Required Nanber of Channels

• and "Mininum Channels

-o Operable" for the Standby Gas Treatnent System Radiation Monitors. ,

8@ Thus, this r,ubmittal addresses the NIC staff corcern by modifying the f

~p proposed wording for the Standby Gas Treatnent System Radiation gg Monitors. j m . , _ ,

!. Q~

. Of01H3341 Aoot'

!(( a

I i 1

l USlac September 11, 1990 ,

1 20C-90-0138 Page 2 l i

l J

Detroit Edison has determined that the No Significant Hazards J Considerations analysis contained in Reference 2 remains gplicable to  :

the proposal as nodified herein.

The Fermi 2 Onsite Review Organization has @ proved and the Naclear l Safety Review Group has reviewed the proposed Technical Specit'1 cations !

and concurs with the enclosed determinations. ~In accordance with  ;

10CFR50.91, Detroit mison has provided a copy of this ' letter to the ~  !

State of Michigan. ,

If you have any questions, please contact Mr. Glen D. Ohlemacter at ,

(313) 586-4275.

Sincerely, Enclosure cc A. B. Davis R. W. DeFayette W. G. Rogers J. F. Stang Supervisor, Electric 0 : . .. tors, Michigan Public Service Commi. .On - J. R. Pcdgett l

l .

c-

USNIC l September 11, 1990 10C-90-0138 Page 3 i

l l

l 1

I, WILLIAM S. ORSER, do hereby affirm that the foregoing statenents - i are based on facts and circunstances which are true and scurate to #

the best of my knowledge and belief.-

i 4 i l

WILLIAM S. ORSER  :

Senior Vice President On this day of M /s, 1990, before ne personally ' appeared William Sf dr/

? r, being first duly sworn and says -

t.hst he executed the foregoing as his free act and dead.

, /2/ D Notary Public' ROSN.lf A ARMETTA Nokry Public Monroe County. Mi MyCommluion ExptrosJan.11,1992 l-L i'

.1 .,

p ,

Ehclosure to NHC-90-0138 Page 1 ,

NBIFIM MOVISHES MEL SIMM (RB WWlSWIr W8Ent afcIMICBI MEKitM In' Reference 2 and 3 Detroit B$ison proposed Technical Specification (TS) changes to clarify certain requirements of T3 3/4.3.7.5,

" Accident Monitoring Instrumentation". Anong these changes were changes for the Stadby Gas Treatment System (SGTS) Radiation Monitors. The current TS requireensits for,these nonitors are poorly defined (see attched current TS) because they do' not clearly specify  !

the required instrunentation ranges. References,2 and 3 corrected j this problem by clearly specifying the required ranges.t However< the +

IOC staff has expressed concern over the fornetting of the p oposed TS. The concern is that the 'IE requirements as proposed (see attched -i References 2 & 3 proposed Tech Spec) for the " Required Number of . l Chanels" and Minimum Channels Operable" do not clearly specify the .;

nunter of required channels per SGTS subsystem. ~ The problem is related to the nunt)er of required chmnels, which 'is specified as 2 ,

for the " Required Number of Chenels" and Minimum Channels Operable", I when conpare6 to the ** footnote, which specifles one per (PEJABLE SGTS subsystem. Without prior knowledge of tne SGTS instrumentation '

configuration the rea5er of the proposed TS can become confused over. '

the number of required channels per SGTS subsystem.

The SGTS consists of two subsystens. - Ech SGTS subsystem has one radiation menitor consisting of nultiple channels / ranges. The intent of the proposed TS is to require that the specified charmels of ech SGTS subcystem's radiation monitor t~ (FERABLE. Tlus, two specified channels for the SOTS or ota specifiso chmnel per CPEIABIE  !

subsystem. This is alse the intent of the current;TS provisions.- '

This is reflected in the current ** footnote for Table 3.3.7.5-1.  :

'these provisions were added by Amendment 28 to the Fermi 2 Operating License. In the Safety Evaluation associated with this amendment the .

NHC staff stated that: "The intent of Technicali Specification 3.3.7.5 is to take conpensatory measures within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> when no accident range nonitor is available in the operable SGTS flow path". The new  :

wordP more clearly reflects this intent..

The attached proposed changes for this submittal specify the " Required-  ;

Itamber of Chmnels" and Hininum Channels Operable" as "1/CPERABIE SGTS subsystem" and delete the ** footnote wording.. Spanifying the '

number of required channels on a subsysten or divisional basis is more -

consistent with che tjpical Standard Technical Specification . .

terminology for this type of situation than the Reference 2 and 3  !

proposals and removes the need for the conflicting footnote wording.

Please note that because the ** footnote wording has been deleted by 1 this proposal, the previously proposed *** footnote _ wording has been changw5 to ** footnote.

I

+

I

.. . 1 j

Enclosure to i NIC-90-0138 1 Page 2 ~

l t

stesmcaur nasalms amamampum

'Ihis submittal nodifies. the References 2 and 3 proposals solely to  ;

amend the proposed wording for the SGTS Radiation Monitoring  ;

Instrumentation. 'the basis for the conclusion thab the Reference 2 ,

proposal does not involve a significant hasards consideration is  !

unaffected by the proposed formatting changes discussed in this -  !

sutstittal because the intent of the Reference 2 sutanittal is ,

unchanged.

.i I

'i

-I J