ML20065B472

Proposed Tech Specs Re Revision of Decription of Groundwater Monitors

ML20065B472
Person / Time
Site:	Mcguire, McGuire
Issue date:	03/25/1994
From:	DUKE POWER CO.
To:
Shared Package
ML20065B427	List: ML20065B424 ML20065B472
References
NUDOCS 9404040017
Download: ML20065B472 (3)

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FOR INFORMATION ONLY BASES '

SNUBBERS (Continued)

The service life of a snubber is established via manufacturer input and information through consideration of the snubber service conditions and associated installation and maintenance records (newly installed snubber, seal .

replaced, spring replaced, in high radiation area, in high temperature area, etc. . .). The requirement to monitor the snubber service life is included to ensure that the snubbers periodically undergo a performance evaluation in view of their age and operating conditions. These records will provide statistical bases for future consideration of snubber service life. The requirements for.the maintenance of records and the snubber service life review not intended to affect plant operation.

3/4.7.9 SEALED SOURCE CONTAMINATION The limitations on removable contamination for sources requiring leak testing, including alpha emitters, is based on 10 CFR 70.39(c) limits for plutonium. This limitation will ensure that leakage from Byproduct, Source, and Special Nuclear Material sources will not exceed allowable intake values.

Sealed sources are classified into three groups according to their use, * .

with Surveillance Requirements commensurate with the probability of damage to a source in that group. Those sources which are frequently handled are required f to be tested more often than those which are not. Sealed sources which are (

continuously enclosed within a shielded mechanism (i.e., sealed sources within s radiation monitoring or boron measuring devices) are considered to be stored and need not be tested unless they are removed from the shielded mechanism.

3/4.7.10 Deleted S

3/4.7.11 Deleted 3/4.7.12 AREA TEMPERATURE MONITORING The area temperature limitations ensure that safety related equipment will not be subjected to temperatures in excess of their environmental qualification temperatures. Exposure to excessive temperatures may degrade '

equipment and can cause a loss of its OPERABILITY. The temperature limits include an allowance for instrument error of 3.9 F.

3/4.7.13 GROUNOWATER LEVEL This Technical Specification is provided to ensure that groundwater levels will be monitored and prevented from rising to the potential failure limit for the McGuire Units 1 and 2 Auxiliary Buildings. This potential failure limit is based on engineering calculations that have determined that the Auxiliary Buildings are susceptible to overturning due to buoyancy at elevation 737 feet

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Mean Sea level (MSL). Under the requirements of this Technical Specification, if groundwater level exceeds elevation 731 feet MSL, (3 out of 5 Tech Spec McGuire - UgT(1 g.3d g , '> B 3/4 7-6 Amendment No. 98 (Unit 1).

$ 0$00CK 05000369 Amendment No. 80 (Unit 2) p PDR

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GROUN0 WATER LEVEL (Continued) d_

groundwater monitor alarms), and cannot be reduced in one (1) hour, McGuire must begin reducing Units 1 and 2 to Mode 5, Cold Shutdown.

j i Analysis performed by Design Engineering determined that the Reactor and Diesel Generator Buildings are designed to withstand hydrostatic loadings due to 7 groundwater levels up to elevation 760 feet MSL; therefore, no Technical G Specification requirements are specified for these structures.

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Elevation 731 feet MSL is the Technical Specification action level of the five Technical Specification groundwater monitors listed in Table 3.7-7. The East (I Wall exterior monitor alarm at elevation 731 feet MSL is the Alert alarm.due I to-the-geevndweter well being bered to e depth of 730 feet M5L because of under- }

gr4u h ck fermation belcw the well. The other four (4) monitors are Hi-Hi 2 alarms at elevation 731 feet (MSL). /

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The East Wall exterior monitor was-originally on the exterior of the Unit 2 i Auxiliary Building and subsequently was enclosed by the construction of the Equipment Staging Building.

As required by Operations procedures, any alarms on non-Technical Specification groundwater monitors will also be investigated. Additionally, if three (3) out ,

of the five (5) Technical Specification groundwater monitors alarm at levels )

C. below the Technical Specification action levels, Operations will contact Duke Oc M p-Engineering (Civil) for investigation and resolution of the increased (

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groundwater level.

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If one or more of the 5 Technical Specification groundwater monitors is deter- /

mined to be inoperable, the monitor (s) will be considered to be indicating (

above the 731'-0" level until repaired and returned to an operable status. )

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McGuire - UNITS 1 and 2 8 3/4 7-7 Amendment No. 98 (Unit 1) ,7 i Amendment No. 80 (Unit 2-)

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" " " RM ATION ONLY PLANT SYSTEMS g BASES 3/4.7/13 GROUNDWATER 1.EVEL This Technical Specification is provided to ensure that groundwater levels will be monitored and prevented fron rising to the potential failure limit for the McGuire Units I and 2 Auxiliary Buildings. This notential failure limit is based on engineering calculations that have determined that the Auxiliary Buildings are susceptible to overturning due to buoyancy at elevation 737 feet Mean Sea Level (ftSL). Under the requirements of this Technical Specification. l if groundwater level exceeds elevation 731 feet MSL, (3 out of 5 Tech Spec  !

groundwater monitor alams), and cannot be reduced in one (1) hour. !!cGuire )

must begin reducing Units 1 and 2 to tiode 5. Cold Shutdown.

Analysis perfonned by Design Engineering detemined that the Reactor and i i Diesel Generator Buildings are designed to withstand hydrostatic loadings due to groundwater levels up to elevation 760 feet MSL; therefore, no Technical i Specification requirements are specified for these structures.

Elevation 731 feet MSL is the Technical Specification action level of the five Technical Sweification groundwater monitors listed in Table 3.7-7. The East Wall exterior monitor alam at elevation 731 feet MSL is the Alert alam due  !

to the groundwater well being bored to a depth of 730 feet HSL because of. ( l underground rock femation below the well. The other four (4) monitors a're ( '

Hi-H1 alarms at elevation 731 feet (MSL).

The East Wall exterior monitor was originally on the exterior of the Unit 2 Auxiliary Building and subsequently was enclosed by the construction of the Equipment Staging Building.

As required by Operations procedures, any alams on non-Technical Specifica-tion groundwater monitors will also be investigated. Additionally, if three (3) out of the five (5) Technical Soecification Groundwater monitors alam at levels below the Technical Specification action levels, Operations will con-tact Duke Design Engineering (Civil) for investigation and resolution of the increased grtundwater level.

If one or more of the 5 Technical Soecification groundwater monitors is deter-mined to be inoperable, the monitor (s) will be considered to be indicating above the 731'-0" level until repaired and returned to an operable status.

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ficGUIRE - UNITS I and 2 8 3/4 7-8 knendment No. 93 (Unit 11 Anendment flo. 74 (Unit 2)