LARGE SCALE MOLTEN SODIUM-BASALT CONCRETE TESTS WERE CARRIED OUT IN SUPPORT OF THE NRC STAFF POSITION THAT VIGOROUS SODIUM-CONCRETE
REACTIONS COULD BE EXPECTED. BASALT CONCRETE PENETRATION RATES OF ABOUT 2.5 CM. PER HOUR WERE OBTAINED. THE REACTION CONTINUES
UNTIL THE SODIUM IS CONSUMED ON EITHER BARE CONCRETE OR BENEATH A DEFECTED STEEL LINER. DEFECTS AS SMALL AS 0.6 X 15 CM. DO NOT
PLUG BUT PERMIT ESSENTIALLY ALL OF THE SODIUM TO REACT WITH THE CONTRETE WHILE THE REACTION PRODUCTS DEFORM THE LINER. SILICEOUS
FIREBRICK INSULATING LAYERS BENEATH THE LINERS ALSO REACT READILY WITH THE SODIUM. IF THE SIDE WALLS ARE EXCLUDED, THE TOTAL
CONCRETE PENETRATION IS ABOUT 50% OF THE INITIAL SODIUM POOL DEPTH.

AS INDICATED IN DR. LEVINE'S LETTER OF OCTOBER 11, 1979, NRR REQUESTED (CASE TO LEVINE LETTER DATED 3/7/79) THAT THE CONFIRMATORY
RESEARCH PROGRAM INVESTIGATE THE INHERENT RETENTION CAPABILITY FOR SODIUM AND SOME CORE DEBRIS BE REDIRECTED TOWARDS FFTF RATHER
THAN CRBR FOR WHICH LICENSING ACTIVITIES HAD BEEN SUSPENDED. THERE IS NO LICENSING ACTIVITY ON CRBR AND ITS FUTURE IS UNCERTAIN.
THE FFTF IS ESSENTIALLY COMPLETE, THEREFORE, THE INTEREST IN THIS EFFORT FOR LMFBR'S IS GENERIC, IN NATURE.
APPLICATION OF THE REMAINDER OF THIS EFFORT MAY BE TOWARDS THE PROTOTYPE LARGE BREEDER STUDY.
THE MOST DIRECT

*** NRR: IMPACT OF RESULTS ***

THE RESULTS OF THIS WORK STRONGLY INFLUENCED THE ADVICE AND RECOMMENDATIONS GIVEN TO THE FFTF PROJECT REGARDING THE ADEQUACY OF
EXISTING FFTF CONTAINMENT MARGINS AS REPORTED IN THE STAFF'S SAFETY EVALUATION REPORT HUREG-0358, SUPPLEMENT 1, DATED MAY 1979.
THE RECOMMENDATION MADE BY THE STAFF AND SUPPORTED BY ACRS INCLUDED MEANS FOR MONITORING THE CONTAINMENT ATMOSPHERE FOR RADIATION,
ATMOSPHERE IN THE EVENT OF MELTDOWN TO REDUCE THE RADIOLOGICAL RELEASES.
TEMPERATURE, PRESSURE, OXYGEN, AND THE INCORPORATION OF HYDROGEN IGNITERS AS WELL AS MEANS TO SCRUB/FILTER THE CONTAINMENT

*** NRR: COMMENTS AND REMARKS ***

TESTS WITH AND WITHOUT FLAWED LINERS. (FLAWS SIMULATING HELD CRACKS SHOULD BE CONSIDERED.) FUTURE GENERIC STUDIES OF OTHER CONCRETE AGGRAGATES, CELL CONFIGURATIONS (CYLINDRICAL, RECTANGULAR) SHOULD BE CONDUCTED AS WELL AS DIFFERENT TYPES OF FIREBRICK (E.O.. COMMERCIAL MGO, AL203, ZR02) SHOULD BE EXAMINED IN TERMS OF COMPATIBILITY WITH SODIUM AND ABILITY TO PROTECT THE CONCRETE.

AN IMPORTANT GOAL OF THE RESEARCH PROGRAM IS TO PRODUCE USEFUL SEISMOTECTONIC AND SEISMIC ZONING MAPS FOR THE STUDY AREA.
FISCAL YEAR 1978 HAS THE SECOND YEAR OF A FIVE-YEAR PROGRAM. RESULTS OF AEROMAGNETIC SURVEYS FUNDED IN FY 77 WERE INTEGRATED WITH
PREVIOUSLY EXISTING DATA IN ADJACENT AREAS. EXTENSIVE GRAVITY SURVEYS WERE MADE IN KENTUCKY AND INDIANA NEAR THE INTERSECTION OF
THE 38TH PARALLEL LINEAMENT AND THE NORTHEASTERN EXTENSION OF THE NEW MADRID SEISMIC ZONE. THE STATIONS WERE GRAVIMETRICALLY
CONSTRUCTED. AN INTERESTING RELATIVE POSITIVE ANOMALY OCCURS PARALLEL TO THE WABASH VALLEY FAULT SYSTEM.

THE GOAL OF THIS RESEARCH BY SEVERAL STATE GEOLOGICAL SURVEYS AND UNIVERSITIES IS TO DEFINE THE STRUCTURAL SETTING AND TECTONIC
HISTORY OF THE REGION AROUND NEW MADRID, MISSOURI IN ORDER TO PROVIDE THE BASES FOR A MORE REALISTIC APPRAISAL OF THE EARTHQUAKE
RISKS IN THE SITING OF NUCLEAR FACILITIES IN THE NORTH AMERICAN MID CONTINENT. IT IS RECOMMENDED THAT THE INFORMATION CONTAINED IN
NUREG'S 0739 AND 0450 BE USED AS A BASIS FOR CONTINUING RESEARCH, AS INPUT TO THE EVALUATION OF SEISMIC RISK IN THE REGION WITHIN
AND AROUND THE MISSISSIPPI EMBAYMENT, AND AS A CONTRIBUTION TO OUR UNDERSTANDING OF INTERPLATE TECTONICS IN GENERAL.

NUREG'S 0739 AND 0450 SUMMARIZE THE STUDIES AND RESULTS OF THE FIRST TWO YEARS OF A FIVE YEAR PROGRAM, THEREFORE, IT IS TOO EARLY
TO ASSESS THE IMPACT CN NUCLEAR POWER PLANT LICENSING EXCEPT IN A VERY PRELIMINARY WAY. THE TOTAL IMPACT CANNOT BE ASSESSED UNTIL
THE OVERALL PROGRAM IS COMPLETED AND SYNTHESIZED WITH SEISMIC MONITORING DATA.

RESEARCH PROJECT CONTROL SYSTEM RESEARCH RESULTS UTILIZATION REPORT

** ISSUED RILS **

RIL IIILE LOFT REACTOR SAFETY PROGRAM RESEARCH RESULTS SPONSORING OFFICE(S): NRR

THE 2ND LOFT RIL SUMMARIZED THE RESULTS OF THE FIRST TWO NUCLEAR LOCE'S PERFORMED AT THE LOFT FACILITY IN FY 1979. THE TWO TESTS
ARE PART OF THE L2 LARGE COLD LEG BREAK EXPERIMENTS. L2-2 WAS CONDUCTED OF A LINEAR HEAT GENERATION RATE OF 8KW/FT AND L2-3 HAS
AT 12 KW/FT. BOTH TESTS, WHICH ASSUMED AVAILABILITY OF OFF-SITE POWER, DISPLAYED A DOUBLE REVERSAL OF CORE FLOW DURING DEPRESSUR-
IZATION. THE RETURN TO POSITIVE CORE FLOW WAS SUFFICIENT TO QUENCH THE CORE PRIOR TO THE INITIATION OF EMERGENCY CORE COOLANT
INJECTION. IMPROVEMENTS ON COMPUTER CODE MODELS AND NODALIZATION ARE IDENTIFIED WHICH PERMIT A GOOD PREDICTION OF THE OBSERVED
ALL OF THE BEST-ESTIMATE CODES USED TO PREDICT L2-3 PREDICTED GENERALLY HIGHER CLADDING TEMPERATURES THAN WERE

PHENOMENA. MEASURED.