ML20151K856
| ML20151K856 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 05/21/1985 |
| From: | Ballard R Office of Nuclear Reactor Regulation |
| To: | Crutchfield D, Novak T Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20151K803 | List: |
| References | |
| FOIA-85 511, FOIA-85-511 NUDOCS 8505300686 | |
| Download: ML20151K856 (3) | |
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MAY 2 l'1985 Docket No.Y 50-458 MEMORANDUM FOR: Dennis M. Crutchfield, Assistant Director for Safety Assessment, DL Thomas M. Novak, Assistant Director for Licensing, DL THRU:
William V. ?ohnston, Assistant Director Materials, Chemical & Environmental Technology, DE FROM:
Ronald L. Ballard, Chief Environmental & Hydrologic Engineering Branch, DE
SUBJECT:
EHEB REVIEW 0F RIVER BEND UNIT 1 TECHNICAL SPECIFICATIONS
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As requested, we have reviewed the hydrologic engineering related technical specifications for River Bend Unit I which consists of Technical Specification 3/4.7.1.2 Ultimate Heat Sink - Limiting Conditions for Operation.
We do not agree with the proposed basin water level at elevation 108' 6" msl. This will not provide for enough water to assure meeting the requirements of R.G. 1.27 and GDC 44. It is our understanding from discussions with the applicant, that the appl.icant intends to propose the elevation of 111' 10" msl as the new limit. We find this water level elevation to be acceptable and have attached a marked-up copy of the 4
technical specification to show our requested changes.
In regard to the applicant's intent to delay fan start on the cooling tower in the event of an accident, we recommend that any technical specifications addressing this item be issued separately at a later date. We recomend this because of the late submittal of the applicant's proposed changes (March 15,1985), and the trade-offs in safety which involve other review branches. Our contractor has made
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Those Listed MAY 211985 an indepe~ dent analysis of the applicant's proposed fan start delay of n
two hours,and has found it acceptable. Our contractor is capable of looking at other scenarios which the Auxiliary Systems Branch (ASB) may wish to consider.
In addition, it is our understanding that ASB will require that a continuous basin water temperature monitoring system be installed in the future. We agree with this requirement particularly in consideration of.
the delayed fan start.
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Ronald L. Ballard, Chief
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Environmental ~& Hydrologic Engineering Branch Division of Engineering
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Attachment:
As stated cc:
D. Houston l
S. Stern J. Ridgely D. Chery R. Wescott DISTRIBUTION:
Dockets EHEB Rdg RLBallard/ file i
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NAME RWescott:ws : DLChery WVJohnston :
5/8/85 5/M/85 lDATE:5/n/85
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' 0FFICIAL RECORD COPY n3 y
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' ULTIMATE HEAT SINK LIMITING CONDITION FOR OPERATION 3.7.1.2. The standby cooling water storage basin shall be OPERAglE TA minimum basin water level at or above elevation W iij to "
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Level, USGS datum, and ea b.
An average basin water temperature of less than or equal to 82*F Two OPERABLE cooling tower fan cells (5 fans per cell) per divisi c.
APPLICABILITY:
OPERATIONAL CONDITIONS 1, 2, 3, 4, 5 and *.
ACTION:
With the requirements of the above specification not sajisfied:
H /, /0 With the basin water level less than Me%" MSL or the temperature a.
the Action required by Specification 3.7.1.1. greater than-8 b.
With any one fan cell inoperable, restore the inop'erable fan cell to OPERABLE status within 30 days or be in at least HOT SHUTDOW the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and COLD SHUJDOWN within the next 24
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e With one fan cell per division inoperable, restore at least one to c.
1 OPERABLE status within 7 days or be in at least HOT SHUTDOWN w i
the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUT 00WN within the ne d.
declare one SSW subsystem inoperable and t by Specification 3.7.1.1.
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In OPERATIONAL CONDITION 4, 5 with no fan cells OPERABLE, dec e.
t the SSW system inoperable and take the ACTION required by Specifi-l cation 3.7.1.1.
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In Operational Condition
- with no fan cells OPERABLE, declare the The provisions of Specification 3.0.3 are not applicab i
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When nancTing irra~diated fuel in prim
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ary or secondary containment.
i RIVER ECID - UNIT 1 3/4 7-3 APR 2 61985
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