ML20235B600

Application for Amend 160 to License DPR-54,adding Tech Specs for Min Meteorological Instrumentation Required for Emergency Response Purposes Per Suppl 1 NUREG-0737 & Reg Guide 1.97.Fee Paid

ML20235B600
Person / Time
Site:	Rancho Seco
Issue date:	06/29/1987
From:	Andognini G SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Miraglia F Office of Nuclear Reactor Regulation
Shared Package
ML20235B603	List: ML20235B600 ML20235B641
References
RTR-NUREG-0737, RTR-NUREG-737, RTR-REGGD-01.097, RTR-REGGD-1.097 GCA-87-081, GCA-87-81, TAC-65731, NUDOCS 8707090121
Download: ML20235B600 (6)

Text

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ry gouunSACRAMENTO MUNICIPAL UTILITY DISTRICT C P. O. Box 15830, Sacramento CA 95852-183o,(916) 452-3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CALIFORNIA GCA 87-081 JUN 2 9.1987 Associate Director for Projects Attn: Frank J. Miraglia, Jr.

U. S. Nuclear Regulatory Commission Washington, DC 20555 Docket No. 50-312

. Rancho Seco Nuclear Generating Station Unit # 1 License No. DPR-54 PROPOSED AMENDMENT NO. 160

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Dear Mr. Miraglia:

In accordance with 10 CFR 50.59, the Sacramento Municipal Utility District hereby submits Proposed Amendment No. 160 to Operating License No. DPR-54 for l Rancho Seco Nuclear Generating Station Unit No. 1. 1 Proposed Amendment No. 160 adds, Technical Specifications for the minimum meteorological in:,trumentation required for emergency response purposes pursuant to Supplement 1 to NUREG-0737 and Regulatory Guide 1.97. The proposed amendment ensures that sufficient meteorological data are available for estimating potential radiation doses to the public and for evaluating the need for initiating protective measures. Additionally, the proposed amendment adds surveillance requirements for plant meteorological instrumentation.

Proposed Amendment No.160 is an addition to Technical Specifications.

Currently, the Technical Specifications do not address meteorological instruments. i Attachment 1 provides the Description of the Proposed Change and the associated Safety Analysis. Attachment 2 provides the "No Significant Hazards Determination." Attachment 3 provides the proposed Technical Specifications.

Pursuant to 10 CFR 50.91(b)(1), the Radiological Health Branch of the California State Department of Health Services has been informed of this proposed amendment by copy of this submittal.

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,p 87070hhOD e a pn~ r RANCHO SECO NUCLEAR GENERATING STATION O 1444o Twin Cities Road, Herald, CA 95638 9799;(209) 333 2935 t

' GCA 87-081 Frank J. Miraglia JUN 2 91gp Enclosed is a check in the amount of $150.00 as required by 10 CFR 170.21,

" Schedule of Fees."

If there are any questions concerning this submittal, please contact Mr. Ron H. Colombo at (916) 452-3211, extension 4236.

Sincerely,

/f/ ~Mrsb

. Car.1 Andog i l Chief Executive Officer, Nuclear Sworn to and subscribed before me this 29 day of June, 1987.

l/YL f, cb b/n4hp Notary'P6blic'~/'

Attachment G} .. ESTHER H. HUGHES t cc w/atch: ?t o-J)@f N!.?%

NOTARY PUSUC- CALFOaNIA Y SACRAMENTO COUNTY /

'~ ~ ~"~ ~ ~~ "f e-c My Comm Expkes Oct 21,1989 l G. Kalman, NRC, Bethesda (2)

A. D'Angelo, NRC, Rancho Seco J. B. Martin (2)

MIPC (2)

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FACILITY CHANGE SAFETY ANALYSIS LOG NO. 970, REY. 1 PROPOSED AMENDMENT NO.160 PAGE 1 0F 4 q l

DESCRIPTION:

Proposed Amendment No.160 adds requirements for operability of the meteorological monitoring instrumentation to the Rancho Seco Technical Specifications (Section 3.29, Meteorological Monitoring Instrumentation).

Additionally, the proposed amendment adds surveillance requirements for the instrumentation to Technical Specifications Surveillance Standards (Section ,

4.34). The Table of Contents is changed to reflect the addition of Sections 3.29 and 4.34.

REASON FOR CHANGE:

Purpose Proposed Amendment No.160 specifies the requirements for the minimum meteorological information required for emergency response purposes as specified in Supplement 1 to NUREG-0737 and Regulatory Guide 1.97. for site meteorology. This Technical Specification ensures that sufficient meteorological data is available for estimating potential radiation doses to the public and will be used to evaluate the need for initiating protective measures.

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! Additionally, this proposed amendment adds surveillance requirements for the l instrumentation specified in Section 3.29 of Proposed Amendment No.160.

This is an addition to Technical Specifications; there previously have been no i requirements in Technical Specifications for meteorological instruments.

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l EVALUATION AND BASIS FOR SAFETY FINDINGS:

1 Systems, Subsystems, Components Affected This Proposed Amendment affects the meteorological tower and the monitoring instrumentation associated with the tower.

Safety Functions of Affected Systems / Components The 200-foot meteorological tower is-located on a hill approximately 3000 feet east of the Reactor Building. It was first used to collect data in June 1969. It is a Rohn SSV tower, with open lattice construction, and it supports the meteorological monitoring instrumentation (USAR Appendix 2B.2).

The existing meteorological data acquisition system for Raricho Seco consists of a permanent meteorological tower, instrumentation, and on-line computer.

The purpose of the system is to measure and compile the meteorological data necessary to define the atmospheric diffusion at the site. The system is designed to continue in operation indefinitely so that a broad statisticai base for meteorological conditions at the site can be assembled.

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- FACILITY CHANGE-SAFETY ANALYSIS LOG NO. 970, REY. 1 PROPOSED. AMENDMENT NO.160 PAGE 2 0F 4 Safety Functions of Affected Systems /Conponents (Cont.) ,

The' tower was completely reinstrumented in 1981, and the instrumentation now

- consists of:

• 4 - anemometers to measure wind speed (2 at 60 meters, 2 at 10 meters),

• 4 - vanes to measure wind direction (2 at 60 meters, 2 at 10 meters),

• 4 - detectors to measure temperature (2 at 60 meters, 2 at 10 meters),

• . 2 - detectors to measure dewpoint (at 10 meters)

• 2 - differential amplifiers to compare outputs of the 60-meter and meter temperature instruments to determine atmospheric ld stability, and

• 1 - rain. gauge at 20 feet to measure precipitation.

The dewpoint instrumentation is being removed by ECN R-1554, Rev.1 (see Log No. 995). The NRC concurs with the discontinuance of dewpoint measurements as documented in an NRC letter to the District (3/23/87). 4 Environmental Programs requires meteorological data to generate semi annual effluent reports which contain tabulated raw data. Monthly evaluations of gaseous etfluents and evaluations of sudden atmospheric release use historical d

meteorological data for calculation. The Emergency Preparedness Division ,

requires the capability for continuous assessment of meteorological conditions i during real or potential releases of radiological material in excess of Emergency Action Levels (USAR Appendix 28.6)

Effects on Safety Functions Proposed Amendment No.160 specifies the requirements for operability of the meteorological monitoring instrumentation channels shown in Table 3.29-1 of the Proposed Amendment. It also specifies the required surveillances l necessary to demonstrate the operability of the instrumentation channels shown  !

in the table. This demonstration of operability of the instrumentation enhances the operation of the equipment by promoting the early detection of any equipment degradation.

Analysis of Effects on Safety Functions ,

l NUREG-0103 (Standard Technical Specifications) specifies requirements for meteorological monitoring instrumentation channels to be operable at all ]

times. The instrument channels required are:

1 channel of wind speed, l 1 channel of wind direction, and 1 channel of air temperature / differential temperature.

It also requires the instruments to be demonstrated operable by performance of a channel check and channel ~alibration.

FACILITY CHANGE SAFETY ANALYSIS LOG NO. 970, REY. 1 PROPOSED AMENDMENT NO.160 PAGE 3 0F 4 Analysis of Effects on Safety Functions (Cont.)

Supplement 1 to NUREG-0737 (Requirements for Emergency Response Capability) details the requirement for reliable indication of the meteorological variables (wind direction, wind speed, and atmospheric stability) specified in Reg. Guide 1.97 for site meteorology.

Regulatory Guide 1.97 (Instrumentation for Light-Water-Cor. led Nuclear Power Plants to Assess Plant and Environs Condi"ons During and Following an Accident) specifies that meteorological meat,urements include wind direction, wind speed, and estimation of atmospheric stability.

Proposed Amendment No.160 meets the requirements and specifications of the documents listed above. It requires that the instrumentation listed in Table 3.29-1 be operable at' all times. The instrumentation listed in the table meet the requirements of both NUREG-0737, Supplement 1 and Reg. Guide 1.97, and the guidance of the Standard Technical Specifications. (Delta temperature is obtained by taking the difference between measured air temperatures at 60 meters and 10 meters. With one or more air temperature monitoring channels inoperable for determining delta temperature, the standard deviation of wind direction can be used to determine stability classifications.)

The addition of these requirements and surveillances to the Technical Specifications enhances the capability of the plant to monitor meteorological conditions during real or potential releases of radiological material. ld Summary Proposed Amendment No.160 adds requirements and surveillances concerning meteorological monitoring instrumentation to the Rancho Seco Technical Specifications. The proposed amendment specifies the operability requirement for meteorological instrumentation and lists the type and frequency of surveillances required to insure operability.

This proposed amendment is an enhancement to the meteorological monitoring program in that it will ensure that sufficient meteorological data is available for estimating potential radiation doses and will aid in the early detection of degraded instrumentation channels. It does not change the facility as described in th6 USAR; it does, however, impose requirements which have not previously existed.

This proposed amendment does not introduce any new failure modes and is an enhancement to the function of the meteorological monitoring system.

The probability of occurrence or the consequences of an accident or ,

malfunction of equipment important to safety previously evaluated in the '

safety analysis report will not be increased since the functionality and operation of the meteorological data collection system are not changed by the proposed amendment.

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FACILITY CHANGE SAFETY ANALYSIS LOG NO. 970, REY. 1 PROPOSED AMENDMENT NO.160 PAGE 4 0F 4 Summary (Cont. )

The possibility for an accident or malfunction of a different type than any evaluated previously in the safety analysis report will not be created since the proposed amendment does not change the functionality of the meteorological data collection system, but imposes requirements for operability and equipment i surveillance. ]

The margin of safety as defined in the basis for any Technical Specification is not reduced since the Proposed Amendment is an addition to Technical Specifications and does not change the operation of any safety system.

Therefore, the incorporation of Proposed Amendment No.160 into the Rancho Seco Technical Specifications does not involve an Unreviewed Safety Question. -

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