ML20003B127
| ML20003B127 | |
| Person / Time | |
|---|---|
| Site: | North Carolina State University |
| Issue date: | 10/18/1979 |
| From: | John Thomas North Carolina State University, RALEIGH, NC |
| To: | Lear G Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20003B125 | List: |
| References | |
| NUDOCS 8102100386 | |
| Download: ML20003B127 (2) | |
Text
.
C 0,
North Carolina StateUniversity
/
Box 5067. Raleigh :7oso
-w orEcederchancefkr October 18, 1979 Mr. George Lear, Chief Operating Reactors Dranch 3 Division of Reactor Licensing U.S. 1;uclear Regulatory Commission Washington, D.C.
20555 Docket t;o. 50-29'7
Dear Mr. Lear:
In addition to the r roposed enanges to the Technical 3pecifications to our Facility Operating License R-120 submitted in my letter of July 10, 1979, we are also submitting proposed change to Para. 3.5(2) of this same document in accordance with 10CFR Parts 2 and 50.
This proposed change has been approved by our Radiation Protection Council in accordance with Section 6.2.2.(d) of our Technical Specifications.
Sincerely, f
MM J'
nomas dllor Attachments:
Proposed Change to Para. 3.5(2) and Supporting Analysis to Technical Specifications.
cc:
Dr.
R.
F.
Saxe, w/attachs.
Prof. J.
R. Bohannon, Jr., w/o attachs.
Mr.
L.
T.
Caruthers, w/o attachs.
Dr.
E. C. Theil, w/attachs.
Subscribed and sworn to before me
//[.
d this /y" day of
/F M 1979.
I at Public
~
My commission expires Bo.,.
J7 )920 0
. North Carolina Ssate Universir; at llateigh is a conuitucut inustation of The Universisy of North Caroli giozioo3g6
1 DOCIGT NO. 50-297 t
PROPOSED CFRIGES A'iD SUPPCRTI'IG IdiALYSIS TO TECENICAL SEECIFICATICIG Sectien Requested Change 3.5(2)
Change to read:
2.
Particulate and gas building exhaust
=cnitors centinuously sanpling air gaustedfrc=thefacilitystack.
3.5 Add fcotnote that reads:
(d) Bypassed fer lass than ene minute during the initiatica of the pneu-matic bicwer system.
Safetf Analysis:
To prevent the unnecessary alam which initiates the evaeustica and confine =ent syste=, the particulate and gas building exhaust =cnitors shall be =ccentarily bypassed by the reacter cperator during the initiatien of the pneu=atic blever system. The initiation cf the pneumatic bicwer during pcver eeratien results in a s=all volune of air with an Argen k1 activity level, above the no mal setpoints, =cving through the ventilatien syste=
causing the particulate and gas building exhaust =cnitors to alam.
The requeated chan;;e vill inhibit the unnecesary evacuation during the short-ter= transient of stack gas and particulate activity without ec=prccising reacter safety. In the " event" a fission product release would occur simultanecusly with bypass of the specified =cnitors, the ever-the-pool =oniter would still be capable of initiating evacuatien and confine =ent.
The bypass would be perfer ed by =ccentarily depressing the fail / reset but-ten en the specified =cnitors. Upon release of the fail / reset butten, the channel vill autccatically reset itself to the alar =-ready status. This bypass acticn only bypasses the alam initiation and not the =enitoring function of the channel. Nemally, four channels are available for the detemination of gasecus activity being released: the Stack Gas and Particulate, Filter GM and Auxilia'/ GM channels. The Stack Gas and Particulate, and Filter GM channels are capable of initiating evacuatien and eenfinement, while all four channels produce en alam en high readings and are recorded for calculatien of gaseous release.
t-