ML20195H852

Requests That Encl Questions,Faxed to Gpu Nuclear,Inc on 990616,be Docketed,In Preparation for Forthcoming Conference Call Re TS Change Request 248, Remote Shutdown Sys,

ML20195H852
Person / Time
Site:	Three Mile Island
Issue date:	06/18/1999
From:	Colburn T NRC (Affiliation Not Assigned)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9906180001
Download: ML20195H852 (2)

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NOTE TO: Document Control Desk FROM: Timothy G.'Colburn, Senior Project Manager,Section I d[~ -

Project Directorate i Division of Licensing Project Management Please docket the attached questions faxed to GPU Nuclear, Inc., licensee for TMl-1, on June 16,1999, in preparation for a forthcoming conference call regarding Technical Specification Change Request (TSCR) 248, Remote Shutdown System, dated October 19,1998. Thanks.

Attachment:

As Stated i

Docket No. 50-289 I

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TSCR 248. KEMOTE SHUTDOWN SYSTEM QUESTIONS

1. A review of the TMI-1 definition for hot standby shows that it is different than that of the STS.

In the case of the STS, HOT STANDBY refers to a condition where the reactor is subcritical, in  ;

the case of the TMI 1 TS HOT STANDBY is defined as the reactor being critical. The j applicability statement needs to use th corresponding TMI-1 definition that is equivalent to the standard. None of the TMI-1 definitions is equivalent to the B&W STS HOT STANDBY, where the reactor is subcritical and Tavg is greater than or equal to 330 degrees F. The closest is i TMI-1's definition of HOT SHUTDOWN, where the reactor is suberitical but temperature is i greater than or equal to 525 degrees F. TMI-1 TS have no defined term for when the reactor is I subcritical but temperature is between 200 and 525 degrees F.

2. The proposed TS Table 3.5-4 only contains source range flux However this only covers six decades of counts and its limit is 2-3 decades below the power range. I understand that the operators are supposed to scram the plant prior to leaving the control room, however, it would take some finite amount of time after the scram for the power to reduce to the top limit of the source range monitoring. Justify not having intermediate Range and/or Power Range detectors j in the remote shutdown system, i.e., the STS contains a log power neutron flux in addition to i the source range flux instrument.

3. BWST level is listed as DH-LI-809 in the FSAR, but as DH-T-1 in the proposed TS. Explain j the difference in designation. )

4. An indicator for MU-V-32 is listed in the proposed TS Table 3.5-4 but not indicators for other important indications like MU-P-3B and MU-P-3C the main oil pumps for MU-P-1B and C. Why not.

5. Not all functions listed in Table 7.4-1 of the FSAR are listed in Table 3.5-4 of the proposed TS. How was it decided which functions to include or exclude since all appear to be part of the remote shutdown system. Note, the Table 3.3.18-1 of the STS is for illustration purposes and )

not intended to be allinclusive.

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