RENO-50 Site

June-Ho Choi (Dongshin University)

RENO-50 International workshop (June. 13 ~ 14) Seoul National University

Determination of mass hierarchy Dm213

Neutrino burst from a Supernova in our Galaxy : ~1500 events (@8 kpc) Geo-neutrinos : ~ 300 geo-neutrinos for 5 years Solar neutrinos : with ultra low radioacitivity Reactor physics : non-proliferation Detection of T2K beam : ~120 events/year Test of non-standard physics : sterile/mass varying neutrinos

Requirements for site - low cosmic background : sufficient overburden - low other reactor interference - optimal distance from the reactor cores

Physics with RENO-50

Optimal distance

Max. sensitivity

Reduction of sensitivity

Due to Small flux

Small differencebtw NH and IH

Yoshitaro Takaesu (KIAS/KNRC) : arXiv: 1210.8141

Multi-reactor interference

All Reactors

16.5GW 5kton 10yrs

a = 3%, b = 0.5%

Yoshitaro Takaesu (KIAS/KNRC) : arXiv: 1210.8141

YongGwang only

Other reactor sitesinfluence the sensitivity.

Multi-reactor interference

Distributions ofEach Reactorsconsidered

Reactors direction strongly affects the sensitivity.

16.5GW 5kton 10yrs

a = 3%, b = 0.5%

Including Planned Reactors

Yoshitaro Takaesu (KIAS/KNRC) : arXiv: 1210.8141

NaJu

Reactor site

RENO-50 candidate site

NaJu

Reactor site

RENO-50 Candidate Site

Mt. KumSungAltitude : 450 m

RENO-50 Candidate Site

RENO-50 Candidate Site

Dongshin University

Mt. KumSungAltitude : 450 m

Survival probability

NHIH

Survival probability

Summary

Optimal candidate site - Mt. Kumsung with 450 height - >2σ level for determination of mass hierarchy

Under careful survey for excavation point