ML17053C295

Forwards List of Mods Installed or Completed During 1980

ML17053C295
Person / Time
Site:	Nine Mile Point
Issue date:	01/16/1981
From:	Lempges T NIAGARA MOHAWK POWER CORP.
To:	NRC COMMISSION (OCM)
References
NMP-2833, NUDOCS 8102100368
Download: ML17053C295 (4)

Text

REGULATORY ~ ORNATION DISTRIBUTION SYN (RIBS)

ACCESSION NBR t 8102100368 DOC ~ DATE! 81/01/16 NOTARIZED!'O DOCKET FACIL':50 220 NineI Mi)e Point Nuclear StationE Unit iE Niagara Powe 05000220 AUTH BYNAME AUTHOR AFFILIATION LEMPGES~ T ~ E ~

Ni agara Mohawk< Power Cor p, RECIP ~ NAME RECIPIENT AFFILIATION Commissioners

SUBJECT:

Forwards list ot mods installed or completed during 1980>>

DISTRIBUTION CODE:

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The following modifications were installed and completed during 1980 and are safety-rel'ated.

79.12 Anticipated Transient Without Scram cwork Package fr'1 Reactor Recirc.

Pump Trip on High Reactor Pressure and Low-Low Reactor Level 80.07 Vent 6 Purge Valve Mechanical Stops Limit opening on containment MOV 6 AOV isolation valves to 40% stroke 80 F 11 Reroute Cable Power Board 101 to Power Board 103 Provide separation on cable route of normal supply to P.B.

103 (E.D.G.)

80.43 Torus Saddles Provide additional support to torus shell

80. 50 Torus Room Vent Penetrations Provide penetrations to torus containment room above flooding level to allow ventilation for 80.43 work 80.64 Separate Fuel Oil Lines to Diesel Generators Eliminate inner tie on diesel generator fuel supply lines

80. 70 APRM LPRM Selection Provide additional LPRM selections for APRM's to eliminate failed LPRM chambers from APRM assignment 78.34 Fire Protection Phase 1 and 2 Structural modifications safety and non-safety related to provide stair towers and area separation for fire protection A safety analysis was performed for each safety-related modification.

For each modification, the probability of occurrance or the possibility a different type of an accident or malfunction than those evaluated in the safety analysis report did not change or were enhanced.

Also the margin of safety as defined in the basis of the Technical Specifications did not change.

Based on the above, these modifications did not constitute any unreviewed safety questions.