ML102440122

Massachusetts Institute of Technology, Submittal of Revised Pages for TS No. 3.3.5 and No. 4.2(4)

ML102440122
Person / Time
Site:	MIT Nuclear Research Reactor
Issue date:	08/26/2010
From:	Bernard J Massachusetts Institute of Technology (MIT)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TAC MA6084
Download: ML102440122 (3)

Text

MIT NUCLEAR REACTOR LABORATORY AN MIT INTERDEPARTMENTAL CENTER John A. Bernard Mail Stop: NW12-208a Phone: 617 253-4202 Director of Reactor Operations 138 Albany Street Fax: 617 253-7300 Principal Research Engineer Cambridge, MA 02139 Email: Bernardj@mit.edu August 26, 2010 U.S. Nuclear Regulatory Commission Attn: Document Control Room Washington, DC 20555 Re: Massachusetts Institute of Technology; License No. R-37; Docket No. 50-20; Continued Response to RAI (TAC No. MA 6084) dated 7/16/10

Dear Sir or Madam:

Enclosed are revised pages for TS No. 3.3.5 and No. 4.2(4). The changes are:

TS 3.3.5 - Third sentence of last paragraph of basis is modified to read, "Accordingly, either a daily analysis is done for tritium or an in-line tritium monitor is in service if secondary coolant is supplied to..."

TS 4.2(4) - The first sentence is modified to read, "...and each time before startup of the reactor if the reactor has been in a secured condition or if the instrument or channel has been repaired or de-energized."

Please contact the undersigned if there are any questions.

Sincerely, o

A. Bernard, P D, PE, CHP Director of Reactor Operations I declare under the penalty of perjury that the foregoing is true and correct.

(2 1 Executed on Date

/

/1 Signare cc:

William B. Kennedy Project Manager Research and Test Reactors Branch A U.S. Nuclear Regulatory Commission t "')L

beta particle. Accordingly, either a daily analysis is done for tritium or an in-line tritium monitor is in service if secondary coolant is supplied to a D20 heat exchanger (main or cleanup). If tritium levels exceed that permitted by Specification 3.7.2.2, corrective action is to be in accordance with that specification. In addition, if other detectable activity in excess of 10 CFR 20 limits is identified, the affected heat exchanger will be identified and removed from service.

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reactor if the reactor has been in a secured condition or if the instrument or channel has been repaired or de-energized. Calibration of these instruments or channels (except those such as scram pushbuttons that do not require calibration) shall be done at least annually.

5.

Channel Tests:

Channel tests of the instruments or channels listed in Table 4.2-1 shall be performed if the channel or instrument has been modified or repaired.

6.

The following instruments shall be calibrated and trip points verified when initially installed, any time a significant change in indication is noted, and at least annually:

a)

Period b)

Neutron Flux Level c)

Primary Coolant Outlet Temperature d)

Core Tank Level e)

Reflector Tank Level f)

Primary Coolant Flow g)

D20 Reflector Flow h)

Shield Coolant Flow i)

Period Channel Level Signal Off-Scale

7.

Thermal Power: The signals used to compute thermal power shall be calibrated at least annually.

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