ML20199G072
| ML20199G072 | |
| Person / Time | |
|---|---|
| Site: | 05200003 |
| Issue date: | 12/23/1997 |
| From: | Joseph Sebrosky NRC (Affiliation Not Assigned) |
| To: | Liparulo N WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| References | |
| NUDOCS 9802040206 | |
| Download: ML20199G072 (3) | |
Text
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December 23, 1997
' Mr. Nicholas J. Liparuto, Manager Nuclear Safety and Regulatory Analysis Nuclear aSJ Advanced Technology Division; Westinghouse Electric Corporation P.O. Box 355 Pittsburgh, PA 15230 SUPlECT:- SAFETY EVALUATION REPORT (SER) OPEN ITEMS ASSOCIATED WITH AP600 SHUTDOWN TECHNICAL SPECIFICATION-Dear Mr. Liparulo The Reactor Systems Branch has provided a partial SER submittal te the projeds staff on the shutdown technical specifications. However, the SER contained sde open items. These open items have been extracted from the SER and can be found in the enclosure to this letter, a
You have requested that portions of the information submitted in the June 1992, application for cesign cedificction be exempt from mandatory public disclosure.' While the staff has not completed itt review of your request in accordance with the requirements of 10 CFR 2.790, that
. portion of the submitted information is being withheld from public disclosure pending the staff's final determination. The staff concludes that these follow on questions do not contain thosr.
portions of the information for which exemption is sought. However, the staff will withhold this letter from public disclosure for 30 calendar days from the date of this letter to allow
- Westinghouse the opportunity to verify the staffs conclusions, if, after that time, you do not t
request that all or pcrtions of the information in the enclosures be withheld from public discit Jre l
in accordance with 10 CFR 2.790, this letter will be placed in the Nuclear Regulatory Commission J
Public Document Room.
i l
If you have any questions regarding this matter, you may ::ontact me at (301) 415-1132.
Sincerely, Original signed by:
Joseph M. Setirosky, Project Manager Standardization Project Directorate Division of Reactor Program Management Office of Nuclear Reactor Regulation Docket No.52-003 i
Enclosure:
As stated cc w/ encl: Eee next page
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DISTRIBUTION:
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M Fdi CEf S COPY DOCUMENT NAME: A:SRXB_TS.RAI To receive a copy of this document, Indicate in the box: "C" = Copy without attachm"t/ enclosure "E" = Copy.
with attachment / enclosure "N" : No copy OFFICE PM:PDST:DRPM l D:SRXB:DSSA lfd D:PDST:DRPM l
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Open items Associated with Technical Specification LCO 3.4.13 Thru 3.5.8 Related to Shutdown Backaround:
These specifications are under review as a part of the shutdown risk evaluation. Tne staff requires that more information and an expanded justification be provided regaroing the required actions end associated comp!ation times for the LCO non-conformance conditions, and the end states for failure to complete the required actions. The staff has identified the following discrepancies in the TS and the associated BASES.
440.805F in Bases B3.4.14, the action completion times for A.1 and A.2 to open the affected the ADS stage-1, -2, or -3 flow path, or establish an attemative flow path is stated to be 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br />, which is inconsistent with the completion time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> in LCO 3.4.14.
440.606F The Pcssive Systems Shutdown Mode Matrix Table on Page B 3.0-5 indicates that in MODE 5 with the RCS pressure boundary open (with reduced RCS inventory or not), the required end state for non-compliance with the LCOs, is MODE 5 with the RCS pressure boundary closed and a visible pressurizer level.
This is consistent with LCOs 3.b.7 and 3.E.8 in that, if the required action E.1, for failure to restore the operal :lity of the IRWST or containment recirculation path
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with condnions A through 0, is to initiate action to be in MODE 5 with RCS intact u
and a visible levelin the pr':ssurizer. However, BASES B3.5.7 and B3.5.8 indicate the immediate actions E.1 and E.2 is to place the plant in MODE 5 with RCS open and a visiblo levelin the pressurizer. This end state inconsistency shouni be corrected. Westinghouse should provide an appropriate basis describing why the end state should be an open or closed RCS. Also, if the end state is a closed RCS pressure boundary, does that mean that, when the inoperable IRWST cannot be restored, the ADS stage-1, -2, and -3 flow paths must be closed (which were required by LCO 3.4.14 to be open in MODE 5 with the RCS pressure boundary open)?
440.807F The applicability MODES for LCO 3.5.8 are MODE 5 with RCS open with pressurizer level not visible, cind MODE 6. However, the discussion for Actions E.1 and E.2 in BASES 33.5.8 states that "in MODE 5 with the RCS intact with a level not visible in the pressurizar..." l his inconsistency should be corrected.
440.808F Westinghouse should verify that all the tech specs rela'ed to shutdown operation have been thoroughly evaluated in concert with the shutdown evaluation report.
Enclosure k
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DISTRIBUTION:- Letter to Mr. Nicholas J. Uoaruloi dated: December 23, 1997
'* Docket File
- Enclosure to be held for 30 days
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