(LEAD) (Olympics) S. Korea's Kim Bo-reum wins silver in women's mass start speed skating

(ATTN: ADDS more details from 4th para, photo)

By Kim Boram and Kang Yoon-seung

GANGNEUNG, South Korea, Feb. 24 (Yonhap) -- South Korea's Kim Bo-reum won silver in the new women's mass start speed skating on Saturday at the PyeongChang Winter Games,