ML19344F105
| ML19344F105 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/10/1980 |
| From: | Goldberg S NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD) |
| To: | Lochstet W AFFILIATION NOT ASSIGNED |
| References | |
| ISSUANCES-OLA, NUDOCS 8009120416 | |
| Download: ML19344F105 (4) | |
Text
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September 10, 1980 1
Mr. William A. Lochstet
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119 E. Aaron Drive
-l State College, Pennsylvanit 16801 In the Matter of Metropolitan Edison Company, et al.
(Three Mile Island Nuclear Station, IEit 2)
Docket No. 50-320 OLA
Dear Bill:
Per your request for infomation, datW August' 22, 1980, I am advised that the Licensee will provide you data on the radiation levels for recent and future containment entries. Drawings of source range monitoring channels are con-tained in Section 7.8 of the TMI-2 Final Safet;y Analysis Report (FSAR)'and in Appendix 7A thereto. Various engineering drawings of the containment building at different elevations and cross-sections are contained in Section 6.2 of the FSAR.
A' copy of the FSAR is available for public use i l
at the NRC local public docisnent room (LPOR) astablished at the State Library of Pennsylvania, Government Publications Section, Education Building.
Coranonwealth and Walnut Streets, Harrisburg, Pennsylvania. You will be placed i
on the distribution list for receipt of the TMI Program Office weekly status reports.
Enclosed, for discussion purposes, is a preliminary Staff msponse to the proposed draft modifications to proposed technical specification 3.3.1.1 which accompanied your August 22 letter. Tne Staff is prepared to discuss this matter further at your earliest convenience.
Dist Sincerely, NRC Central LPDR
/s/
Shapar/Engelhardt Christenbury/Scinto Steven C. Goldberg Olmstead,~ w t Counsel for NRC Staff Goldberg Chron
Enclosure:
FF(2)
As Stated cc : George F. Trowbridge, Esq. w/ enc 1.
Mr. Steven C. Sholly Dr. Judith H. Johnsrud yd[
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. NRC FORM 318 (9 76) NRCM 0240 DU.S. GOVERNMENT PRINTING OFF.0Et lS's e 149 369
LIMITING CONDITIONS FOR OPFRATION i
~ 3.3 INSTRUMENTATION 3.'3.1 NEUTRON MONITORING INSTRUMENTATION 3.3.1.1-As a minimum, the neutron' monitoring instrumentation channels of
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Table 3.3-1 shall be.0PERABLE.
APPLICABILITY:.When fuel is'in'the reactor pressure vessel.
ACTION:
With only one source range neutron monitoring channel. 0PERABLE, a.
within 30 days either restore two source range channels to OPERABLE status or submit to the NRC, for its. approval, a plan for restoring two source range channels to OPERABLE status, b.
With no source-range neutron monttoring channels OPERABLE, verify compliance with _ the boron concentration requirements of Specification 3.1.1.2 at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by a mass balance calculation and at least once per 7 days by a chemical analysis and restore at least i
one source range channel to.0PERABLE status within 7 days..If not restored to OPERABLE _ status within 7 days, promptly,- but not later than 30 days from loss of OPERABILITY, submit to the NRC, for its
. approval, a plan for restoring the inoperable channel (s) to OPERABLE status.
i
'With no intermediate range neutron monitoring channels 0PERABLE, c.
restore at least one intermediate range channel to OPERABLE status within 7 days.
If not restored to OPERABLE status within 7 days, promptly, but not later than 30 days from loss of OPERABILITY,-
submit:to the NRC, for its approval, a plan for restoring at least one intermediate range channel to OPERABLE status.
+
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' TABLE 3.3-1 NEUTRON MONITORING INSTRUMENTATION G
MINIMUM i'
e E
TOTAL NO.
CHANNELS CHANNELS
}
.5 FUNCTIONAL UNIT OF CHANNELS 10 TRIP OPERABLE b
1.
Intermediate Range, Neutron Flux 5
and Rate 1
0 1
. --4 2.
Source Range, Neutron Flux and Rate 2
0 2
TABLE 3.3-3 ENGINEERED SAFETY FEATURE ACTUATION SYSTEM INSTRUMENTATION MINIMUM TOTAL NO.
CHANNELS CHANNELS F
FUNCTIONAL UNIT OF CHANNELS TO TRIP OPERABLE ACTION Y
N 1.
LOSS OF POWER a.
'4.15 kv Emergency Bus Undervoltage (Loss of Voltage) 1.
Emergency Bus
- 2-1E and 2-2E 2/ Bus 2/ Bus 2/ Bus 10 2.
. Emergency Bus
- 2-3E and 2-4E 2/ Bus 1/ Bus 2/ Bus 11 ACTION 10 -
With the number of OPERABLE channels one less than the Total Number of Channels, place the inoperabic channel in the tripped condition within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
ACTION 11 -
None except as provided in Specification 3.0.3.
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3/4.3 INSTRUMENTATION BASES
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3/4.3.1 NEUTRON MONITORING INSTRUMENTATION The neutron monitoring instrumentation, which was included in the normal Reactor Protection System Instrumentation, provides information regarding the shutdown status of the core and it will be used to monitor the core and to ensure that the core remains subcritical.
With the core in its present subcritical configuration, only the source range neutron channels read on scale; the intermediate range channels are reading off scale low. The intermediate range channels would only come on scale if the reactor should reach an approximately critical condition.
Therefore, the Action statements have been directed towards establishing a high priority for restoring inoperable source range channels to an OPERABLE status and towards obtaining NRC approval of the plans for restoring in-operable channels to an OPERABLE status if the inoperability cannot be readily remedied.
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